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HSTCAL 1.2.0rc2 Release Notes

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@jamienoss jamienoss released this 04 May 17:31
1.2.0rc2
43bc710

HSTCAL Version 1.2.0rc2

The following updates, specified in separate sections for each instrument, have been included with this release.

HSTCAL package updates

  • waf installer upgraded to 1.9.9 to support Python 3.6.
  • Added --O3 and --release-with-symbols options in build configuration.
  • Enhanced platform check by installer.
  • HSTCAL error codes were consolidated into a single global include file.

ACS

  • Fixed uninitialized variable in prinfo.c.
  • Corrected --version reporting and added -r to report version string that was previously reported by --version.

STIS

  • calstis version 3.4.1

  • fixed a bug that garbled some FITS HISTORY keywords

  • fixed a bug in the bar finding algorithm

  • fixed a bug in processing highres echelle data in which the error and dq arrays were incorrectly calculated

    No keyword changes.

    The only science changes will be to longslit spectroscopic data and high resolution echelle data.

  • Affects old data

  • Users should re-retrieve affected datasets from the archive

  • updated reference files delivered by science team

WFC3

  • calwf3 updates to version 3.4.1 with this release

Photometry Keyword Updates

  • There are default description strings in calwf3 which are used when the keyword is being added to a header where it doesn't already exist. This update makes the text consistent among all UVIS headers, including the global header keywords that calwf3 adds for user convenience that are not populated in the raw headers during conversion. See issue #67 for more details. The table below details the changes to the photometry header keywords:
Detector Extension Keyword Previous Updated
UVIS 0,1,4 PHOTCORR populate photometric header keywords NO CHANGE
UVIS 0,1,4 FLUXCORR convert to absolute flux units Scale UVIS2 to match UVIS1 using PHTRATIO
UVIS 0 PHOTFLAM inverse sensitivity Inverse sensitivity, ergs/cm2/A/e-
UVIS 1,4 PHOTFLAM Inverse sensitivity, ergs/cm2/A/e- NO CHANGE
UVIS 0 PHOTZPT zero point ST magnitude zero point
UVIS 1, 4 PHOTZPT zero point ST magnitude zero point
UVIS 0 PHTFLAM1 photometry scaling for chip 1 Ch1 Inv Sens, use PHOTFLAM for UV filters
UVIS 1,4 PHTFLAM1 PHOTFLAM on chip1 when scales are not uniform Ch1 Inv Sens, use PHOTFLAM for UV filters
UVIS 0 PHTFLAM2 photometry scaling for chip 2 Ch2 Inv Sens, use PHOTFLAM if FLUXCORR=COMPLETE
UVIS 1,4 PHTFLAM2 PHOTFLAM on chip2 when scales are not uniform Ch2 Inv Sens, use PHOTFLAM if FLUXCORR=COMPLETE
UVIS 0 PHTRATIO photometry scaling for chip2 to chip 1 PHTFLAM2/PHTFLAM1 ratio
UVIS 1,4 PHTRATIO Ratio of PHTFLAM1/PHTFLAM2 PHTFLAM2/PHTFLAM1 ratio
UVIS 1,4 PHOTMODE observation con Observing configuration
UVIS 1,4 PHOTFNU inverse sensitivity, Jy*Sec/electron Inverse sensitivity, Jy*sec/e-
UVIS 1,4 PHOTPLAM pivot wavelength NO CHANGE
UVIS 1,4 PHOTBW RMS bandwidth NO CHANGE

  • Affects old data, all UVIS data will be affected since the keywords are commonly populated

  • Users should re-retrieve affected datasets from the archive for updated header keywords

  • Affects full-frame and subarray UVIS datasets for all filters

  • Code cleanup specific to issue #55 and issue #63; these do not change any data results

Updated reference files which will be part of the reprocessing

This software update itself does not affect data values, just header keyword descriptions. However, the team will be delivering updated reference files at the same time which will be used during reprocessing with calwf3 version 3.4.1. The following reference files will be delivered and used by the archive for reprocessing after this software change has been installed.

Keyword Description Applied Date Range for the new file (USEAFTER) selection keywords Content update or format change?
IMPHTTAB photometry table used by calwf3 All UVIS data DETECTOR = UVIS, PHOTCORR = PERFORM Update
BIASFILE bias reference file All UVIS data DETECTOR = UVIS, BIASCORR = PERFORM Update
FLSHFILE post-flash reference file July 2012 - present DETECTOR = UVIS Update

Reprocessing will begin after the delivery of the reference files and those will affect header keyword values and data for the following:

  • IMPHTTAB: only affects UVIS data which has PHOTCORR = PERFORM, this excludes calibration files like darks and biases
  • BIASFILE: only affects UVIS data which is corrected for bias, including subarrays, except for charge injected data, data which has been read out using a single amplifier, or data from modes which are no longer supported. The science team also plans to begin delivering one bias per year.
  • FLSHFILE: applies to all data taken with post-flash
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