hw/ASTR8060_HW4_solution.ipynb

{
 "cells": [
  {
   "cell_type": "markdown",
   "id": "af98b8fd-ae7f-472b-8192-2a20e5f37015",
   "metadata": {},
   "source": [
    "# ASTR8060 Homework 4 Solution\n",
    "\n",
    "J. Runnoe <br>\n",
    "Fall 2021 <br>\n",
    "\n",
    "This notebook does the critical steps to complete ASTR8060 HW4. It does not include the full exploration of the data, which can vary substantially by person."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 1,
   "id": "vanilla-serial",
   "metadata": {},
   "outputs": [],
   "source": [
    "# import block\n",
    "import numpy as np\n",
    "from astropy.io import fits\n",
    "%matplotlib inline\n",
    "from matplotlib import pyplot as plt\n",
    "from astropy.visualization import hist\n",
    "import ccdproc as ccdp\n",
    "from matplotlib import rc\n",
    "from datetime import datetime\n",
    "from ccdproc import ImageFileCollection\n",
    "import ccdproc as ccdp\n",
    "from astropy.modeling.models import Polynomial1D,Chebyshev1D,Legendre1D,Hermite1D, Gaussian1D\n",
    "from astropy.modeling import fitting\n",
    "from astropy.stats import mad_std\n",
    "from astropy.nddata import CCDData\n",
    "from scipy import stats\n",
    "from astropy import units as u"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "id": "level-davis",
   "metadata": {},
   "outputs": [
    {
     "name": "stderr",
     "output_type": "stream",
     "text": [
      "WARNING: AstropyDeprecationWarning: block_reduce was moved to the astropy.nddata.blocks module.  Please update your import statement. [astropy.nddata.utils]\n"
     ]
    }
   ],
   "source": [
    "# import convenience plotting functions downloaded from \n",
    "# here: https://github.com/mwcraig/ccd-reduction-and-photometry-guide\n",
    "phot_tutorial_dir = '/Users/runnojc1/Software/py/ccd-reduction-and-photometry-guide/notebooks/'\n",
    "import sys\n",
    "sys.path.insert(0,phot_tutorial_dir)\n",
    "from convenience_functions import show_image"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "formal-belly",
   "metadata": {},
   "source": [
    "## Workspace and data preparation\n",
    "\n",
    "Identify the data and reduced directories. These will need to be set by computer. The data_dir variable should be set to a directory containing the raw data. The reduced_dir variable should be set to an empty directory where the reduced data will be stored.\n",
    "\n",
    "Copy over relevant image files and update their header keywords. This step is messy because the files for different types of frames are all over the place in the log.txt file. The approach here is to generate arrays of filenames by counting iteratively from the lowest to highest number relevant for a particular file type, then delete any unnecessary numbers from the list. The filters are hardcoded in to assign the correct filter to the correct filename, based on information in the log. An alternative (and possibly cleaner) to this approach would be to store lists of the relevant file types or filters."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 4,
   "id": "yellow-visit",
   "metadata": {},
   "outputs": [],
   "source": [
    "data_dir = '/Users/runnojc1/Dropbox/Research/teaching/F2021/ASTR8060/Imaging/'            # raw data directory\n",
    "reduced_dir = '/Users/runnojc1/Dropbox/Research/teaching/F2021/ASTR8060/Imaging_reduced/' # working directory"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 5,
   "id": "western-disabled",
   "metadata": {},
   "outputs": [],
   "source": [
    "# read in the biases, they're in a093-a111.fits\n",
    "# add some keywords to their headers and save\n",
    "# them to the reduced/ directory\n",
    "bias_files = ['a'+str(i).zfill(3)+'.fits' for i in np.arange(19)+93]\n",
    "hdus = [fits.open(data_dir+file) for file in bias_files]\n",
    "hdrs = [hdu[0].header for hdu in hdus]\n",
    "    \n",
    "for i in range(np.size(hdus)):\n",
    "    hdrs[i]['imagetyp'] = 'bias'\n",
    "    hdrs[i]['object']   = 'none'\n",
    "    hdrs[i]['biassec']  = '[2141:2200,1:2048]' # FITS indexing, row/col reversed\n",
    "    hdrs[i]['trimsec']  = '[54:2101,1:2048]'\n",
    "    hdrs[i]['filter']   = 'none'\n",
    "    \n",
    "    hdus[i].writeto(reduced_dir+bias_files[i],overwrite=True)\n",
    "    \n",
    "del hdus\n",
    "del hdrs"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 6,
   "id": "canadian-belgium",
   "metadata": {},
   "outputs": [],
   "source": [
    "# read in the flats, they're in a005-a062.fits\n",
    "# add some keywords to their headers and save\n",
    "# them to the reduced/ directory\n",
    "flat_files = ['a'+str(i).zfill(3)+'.fits' for i in np.arange(58)+5]\n",
    "\n",
    "# delete saturated/bad flats from the list\n",
    "del flat_files[16], flat_files[23:26], flat_files[47]\n",
    "\n",
    "hdus = [fits.open(data_dir+file) for file in flat_files]\n",
    "hdrs = [hdu[0].header for hdu in hdus]\n",
    "\n",
    "for i in range(np.size(hdus)):\n",
    "    hdrs[i]['imagetyp'] = 'skyflat'\n",
    "    hdrs[i]['object']   = 'none'\n",
    "    hdrs[i]['biassec']  = '[2141:2200,1:2048]'# FITS standard\n",
    "    hdrs[i]['trimsec']  = '[54:2101,1:2048]'\n",
    "    \n",
    "    if ((i>=16) & (i<=22)):\n",
    "        hdrs[i]['filter']   = 'U'\n",
    "    elif ((i>=22) & (i<= 33)):\n",
    "        hdrs[i]['filter']   = 'B'\n",
    "    elif ((i>=33) & (i<= 40)):\n",
    "        hdrs[i]['filter']   = 'V'        \n",
    "    elif ((i>=40) & (i<= 46)):\n",
    "        hdrs[i]['filter']   = 'R'        \n",
    "    elif ((i>=46) & (i<= 52)):\n",
    "        hdrs[i]['filter']   = 'I'  \n",
    "    else:\n",
    "        hdrs[i]['filter']   = 'Ha'\n",
    "    \n",
    "    hdus[i].writeto(reduced_dir+flat_files[i],overwrite=True)\n",
    "\n",
    "del hdus\n",
    "del hdrs"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 7,
   "id": "municipal-corner",
   "metadata": {},
   "outputs": [],
   "source": [
    "# now do the darks\n",
    "dark_files = ['d'+str(i).zfill(3)+'.fits' for i in np.arange(15)+1]\n",
    "hdus = [fits.open(data_dir+file) for file in dark_files]\n",
    "hdrs = [hdu[0].header for hdu in hdus]\n",
    "    \n",
    "for i in range(np.size(hdus)):\n",
    "    hdrs[i]['imagetyp'] = 'dark'\n",
    "    hdrs[i]['biassec']  = '[2141:2200,1:2048]' # FITS standard\n",
    "    hdrs[i]['trimsec']  = '[54:2101,1:2048]'\n",
    "    hdrs[i]['filter']   = 'none'\n",
    "    \n",
    "    hdus[i].writeto(reduced_dir+dark_files[i],overwrite=True)\n",
    "    \n",
    "del hdus\n",
    "del hdrs"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 8,
   "id": "reflected-plymouth",
   "metadata": {},
   "outputs": [],
   "source": [
    "# now do the pg1633 science images, they're all over the place so generate the full\n",
    "# range and then delete the intervals between exposure sets\n",
    "science_files = ['a'+str(i).zfill(3)+'.fits' for i in np.arange(173)+74]\n",
    "del science_files[19:56]\n",
    "del science_files[29:91]\n",
    "del science_files[39:64]\n",
    "\n",
    "hdus = [fits.open(data_dir+file) for file in science_files]\n",
    "hdrs = [hdu[0].header for hdu in hdus]\n",
    "\n",
    "for i in range(np.size(hdus)):\n",
    "    hdrs[i]['imagetyp'] = 'science'\n",
    "    hdrs[i]['object']   = 'pg1633'\n",
    "    hdrs[i]['biassec']  = '[2141:2200,1:2048]' # FITS standard\n",
    "    hdrs[i]['trimsec']  = '[54:2101,1:2048]'\n",
    "    \n",
    "    if ((i>=7) & (i<=8)) | ((i>=19) & (i<=20)) | ((i>=29) & (i<=30)) | ((i>=39) & (i<=40)):\n",
    "        hdrs[i]['filter']   = 'U'\n",
    "    elif ((i>=8) & (i<=10)) | ((i>=20) & (i<=22)) | ((i>=30) & (i<=32)) | ((i>=40) & (i<=42)):\n",
    "        hdrs[i]['filter']   = 'B' \n",
    "    elif ((i>=0) & (i<=6)) | ((i>=10) & (i<=12)) | ((i>=22) & (i<=24)) | ((i>=32) & (i<=34)) | ((i>=42) & (i<=44)):\n",
    "        hdrs[i]['filter']   = 'V'        \n",
    "    elif ((i>=12) & (i<=14)) | ((i>=24) & (i<=26)) | ((i>=34) & (i<=36)) | ((i>=44) & (i<=46)):\n",
    "        hdrs[i]['filter']   = 'R'        \n",
    "    elif ((i>=14) & (i<=16)) | ((i>=26) & (i<=28)) | ((i>=36) & (i<=38)) | ((i>=46) & (i<=48)):\n",
    "        hdrs[i]['filter']   = 'I'  \n",
    "    else:\n",
    "        hdrs[i]['filter']   = 'Ha'\n",
    "    \n",
    "    hdus[i].writeto(reduced_dir+science_files[i],overwrite=True)\n",
    "\n",
    "del hdus\n",
    "del hdrs"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 9,
   "id": "established-algorithm",
   "metadata": {},
   "outputs": [],
   "source": [
    "# now do the other ngc6823 science images, they're in two sets\n",
    "science_files = ['a'+str(i).zfill(3)+'.fits' for i in np.arange(11)+153]\n",
    "\n",
    "hdus = [fits.open(data_dir+file) for file in science_files]\n",
    "hdrs = [hdu[0].header for hdu in hdus]\n",
    "\n",
    "for i in range(np.size(hdus)):\n",
    "    hdrs[i]['imagetyp'] = 'science'\n",
    "    hdrs[i]['object']   = 'ngc6823'\n",
    "    hdrs[i]['biassec']  = '[2141:2200,1:2048]' # FITS standard\n",
    "    hdrs[i]['trimsec']  = '[54:2101,1:2048]'\n",
    "    \n",
    "    if ((i>=9) & (i<=11)):\n",
    "        hdrs[i]['filter']   = 'U'\n",
    "    elif ((i>=7) & (i<=8)):\n",
    "        hdrs[i]['filter']   = 'B' \n",
    "    elif ((i>=4) & (i<=6)):\n",
    "        hdrs[i]['filter']   = 'V'        \n",
    "    elif ((i>=2) & (i<=3)):\n",
    "        hdrs[i]['filter']   = 'R'        \n",
    "    elif ((i>=0) & (i<=1)):\n",
    "        hdrs[i]['filter']   = 'I'  \n",
    "    \n",
    "    hdus[i].writeto(reduced_dir+science_files[i],overwrite=True)\n",
    "\n",
    "del hdus\n",
    "del hdrs"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "private-timothy",
   "metadata": {},
   "source": [
    "## Overscan subtraction, trim, and master bias subtraction\n",
    "\n",
    "Do overscan substraction, trim the images, and save with *ot.fits filenames. Then make a master bias using an average combine and 3 sigma clipping. Subtract the master bias from all frames and save with *otz.fits flags."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 10,
   "id": "activated-conservation",
   "metadata": {},
   "outputs": [],
   "source": [
    "# make an image collection \n",
    "imgs = ImageFileCollection(reduced_dir,glob_include='[ad]???.fits',glob_exclude='*ot*.fits') # exclude master*, otz files in case of rerun"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 11,
   "id": "italian-passion",
   "metadata": {},
   "outputs": [],
   "source": [
    "# set a model to characterize overscan columns\n",
    "model = Polynomial1D(3)\n",
    "\n",
    "# loop over all frames and do subtraction and trim\n",
    "for ccd, file_name in imgs.ccds(ccd_kwargs={'unit': 'adu'},return_fname=True):\n",
    "    ccd = ccdp.subtract_overscan(ccd, fits_section=ccd.header['biassec'], median=False, model=model)  # subtract overscan, fits index\n",
    "    ccd = ccdp.trim_image(ccd,fits_section=ccd.header['trimsec']) # trim images\n",
    "    outfile = file_name.strip('.fits')+'ot.fits'\n",
    "    ccd.write(reduced_dir+'/'+outfile, overwrite=True) # save the result"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 12,
   "id": "entertaining-quantity",
   "metadata": {},
   "outputs": [
    {
     "name": "stderr",
     "output_type": "stream",
     "text": [
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:splitting each image into 11 chunks to limit memory usage to 350000000.0 bytes.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n"
     ]
    },
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: splitting each image into 11 chunks to limit memory usage to 350000000.0 bytes. [ccdproc.combiner]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n"
     ]
    },
    {
     "name": "stderr",
     "output_type": "stream",
     "text": [
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n"
     ]
    },
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n"
     ]
    },
    {
     "name": "stderr",
     "output_type": "stream",
     "text": [
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n"
     ]
    },
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n"
     ]
    },
    {
     "name": "stderr",
     "output_type": "stream",
     "text": [
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n"
     ]
    },
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n"
     ]
    },
    {
     "name": "stderr",
     "output_type": "stream",
     "text": [
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n"
     ]
    },
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n"
     ]
    },
    {
     "name": "stderr",
     "output_type": "stream",
     "text": [
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n"
     ]
    },
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n"
     ]
    },
    {
     "name": "stderr",
     "output_type": "stream",
     "text": [
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n"
     ]
    },
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n"
     ]
    },
    {
     "name": "stderr",
     "output_type": "stream",
     "text": [
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n"
     ]
    },
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n"
     ]
    },
    {
     "name": "stderr",
     "output_type": "stream",
     "text": [
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n"
     ]
    },
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n"
     ]
    },
    {
     "name": "stderr",
     "output_type": "stream",
     "text": [
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n"
     ]
    },
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n"
     ]
    },
    {
     "name": "stderr",
     "output_type": "stream",
     "text": [
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n"
     ]
    },
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n"
     ]
    },
    {
     "name": "stderr",
     "output_type": "stream",
     "text": [
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n"
     ]
    },
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n"
     ]
    },
    {
     "name": "stderr",
     "output_type": "stream",
     "text": [
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n"
     ]
    },
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n"
     ]
    },
    {
     "name": "stderr",
     "output_type": "stream",
     "text": [
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n"
     ]
    },
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n"
     ]
    },
    {
     "name": "stderr",
     "output_type": "stream",
     "text": [
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n"
     ]
    },
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n"
     ]
    },
    {
     "name": "stderr",
     "output_type": "stream",
     "text": [
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n"
     ]
    },
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n"
     ]
    },
    {
     "name": "stderr",
     "output_type": "stream",
     "text": [
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n"
     ]
    },
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n"
     ]
    },
    {
     "name": "stderr",
     "output_type": "stream",
     "text": [
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n"
     ]
    },
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n"
     ]
    },
    {
     "name": "stderr",
     "output_type": "stream",
     "text": [
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n"
     ]
    },
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n"
     ]
    },
    {
     "name": "stderr",
     "output_type": "stream",
     "text": [
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n"
     ]
    },
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n"
     ]
    },
    {
     "name": "stderr",
     "output_type": "stream",
     "text": [
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n"
     ]
    },
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n"
     ]
    },
    {
     "name": "stderr",
     "output_type": "stream",
     "text": [
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n"
     ]
    },
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n"
     ]
    },
    {
     "name": "stderr",
     "output_type": "stream",
     "text": [
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n"
     ]
    },
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n"
     ]
    },
    {
     "name": "stderr",
     "output_type": "stream",
     "text": [
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n",
      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n"
     ]
    },
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n",
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n"
     ]
    }
   ],
   "source": [
    "# make a master bias from overscan subtracted, trimmed frames\n",
    "# this does a mean combined with 3 sigma clipping\n",
    "imgs = ccdp.ImageFileCollection(reduced_dir,glob_include='[ad]???ot.fits',glob_exclude='master*')\n",
    "biases = imgs.files_filtered(imagetyp='bias', include_path=True)\n",
    "\n",
    "master_bias = ccdp.combine(biases,\n",
    "                             method='average',\n",
    "                             sigma_clip=True, sigma_clip_low_thresh=3, sigma_clip_high_thresh=3,\n",
    "                             sigma_clip_func=np.ma.median, sigma_clip_dev_func=mad_std,\n",
    "                             mem_limit=350e6, unit=u.adu\n",
    "                            )\n",
    "\n",
    "master_bias.meta['combined'] = True\n",
    "master_bias.write(reduced_dir+'master_bias.fits',overwrite=True)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 13,
   "id": "statistical-wallpaper",
   "metadata": {},
   "outputs": [
    {
     "name": "stderr",
     "output_type": "stream",
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    },
    {
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     ]
    },
    {
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     "output_type": "stream",
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    },
    {
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     ]
    },
    {
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     ]
    },
    {
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     ]
    },
    {
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     "output_type": "stream",
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      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n"
     ]
    },
    {
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     ]
    },
    {
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     "output_type": "stream",
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    },
    {
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     ]
    },
    {
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     "output_type": "stream",
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    },
    {
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     ]
    },
    {
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    },
    {
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     ]
    },
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    },
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     ]
    },
    {
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    },
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     ]
    },
    {
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    },
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    },
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    },
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    },
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    },
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    },
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     "output_type": "stream",
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    },
    {
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     "output_type": "stream",
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    },
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    },
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     "output_type": "stream",
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     "output_type": "stream",
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      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n"
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     "output_type": "stream",
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    {
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     "output_type": "stream",
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      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n"
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    },
    {
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     "output_type": "stream",
     "text": [
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n"
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     "output_type": "stream",
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      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n"
     ]
    },
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n"
     ]
    },
    {
     "name": "stderr",
     "output_type": "stream",
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      "INFO:astropy:using the unit adu passed to the FITS reader instead of the unit adu in the FITS file.\n"
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     "output_type": "stream",
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      "INFO: using the unit adu passed to the FITS reader instead of the unit adu in the FITS file. [astropy.nddata.ccddata]\n"
     ]
    }
   ],
   "source": [
    "# subtract the master bias from all frames\n",
    "for ccd, file_name in imgs.ccds(ccd_kwargs={'unit': 'adu'},return_fname=True):\n",
    "    frame_nobias = ccdp.subtract_bias(ccd, master_bias)\n",
    "    outfile = file_name.strip('.fits')+'tz.fits'\n",
    "    frame_nobias.write(reduced_dir+'/'+outfile, overwrite=True) # save the result   "
   ]
  }
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