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Merge pull request #205 from spacetelescope/force_update_html
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Force HTML update to pages fixed in PRs 202 and 203.
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dulude authored Feb 20, 2024
2 parents d98f404 + 71a1514 commit 43f62c5
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"\n",
"However, accurate relative photometry can be obtained as long as a large enough aperture is selected to contain the spilled flux ([ACS ISR 2004-01](http://www.stsci.edu/files/live/sites/www/files/home/hst/instrumentation/acs/documentation/instrument-science-reports-isrs/_documents/isr0401.pdf)). While one could simply use a larger circular aperture, that may introduce error when working with a crowded field (where bright stars are often located).\n",
"\n",
"Here we present a method to identify and perform photometry on saturated sources by defining a custom aperture that is a combination of a standard 0.5\" arcsecond circular aperture and the pixels affected by saturation trails. This method has been tested on ACS/WFC observations of 47 Tuc in the F606W band. The plot below shows the results of using this alternative method to recover flux.\n",
"Here we present a method to identify and perform photometry on saturated sources by defining a custom aperture that is a combination of a standard 0.5\" arcsecond circular aperture and the pixels affected by saturation trails. This method has been tested on ACS/WFC observations of 47 Tuc in the F606W band. The plot below shows the results of using this alternative method to recover flux. \n",
"\n",
"<img src=photometry_recovery.png width =\"900\" title=\"\" alt=\"\">\n",
"\n",
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"\n",
"This notebook has been prepared as a demo on how to perform aperture photometry in SBC images that contain an elevated dark rate. This problem arises when the detector temperature goes above ~25 ºC. \n",
"\n",
"More information on the dark rate can be found in [ISR ACS 2017-04](http://www.stsci.edu/files/live/sites/www/files/home/hst/instrumentation/acs/documentation/instrument-science-reports-isrs/_documents/isr1704.pdf) (Avila 2017).\n",
"More information on the dark rate can be found in [ISR ACS 2017-04](http://www.stsci.edu/files/live/sites/www/files/home/hst/instrumentation/acs/documentation/instrument-science-reports-isrs/_documents/isr1704.pdf) (Avila 2017). \n",
"\n",
"### This tutorial will show you how to...\n",
"\n",
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"name": "python",
"nbconvert_exporter": "python",
"pygments_lexer": "ipython3",
"version": "3.9.13"
"version": "3.8.12"
}
},
"nbformat": 4,
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4 changes: 2 additions & 2 deletions notebooks/ACS/acs_subarrays/acs_subarrays.ipynb
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"#### 1. [Post-SM4 Subarray Data](#_postsm4) \n",
"\n",
"* Update header keywords.\n",
"* Clean Subarray images with the option to correct CTE losses.\n",
"* Clean Subarray images with the option to correct CTE losses. \n",
"* Update WCS solution.\n",
"\n",
"#### 2. [Custom Subarray Data](#_custom)\n",
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"name": "python",
"nbconvert_exporter": "python",
"pygments_lexer": "ipython3",
"version": "3.9.13"
"version": "3.8.12"
}
},
"nbformat": 4,
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"- Display the data.\n",
"- Investigate data quality & check for anomalies.\n",
"- Inspect JIF (jitter/observing log) header keywords for problems.\n",
"- Determine if a HOPR is warranted.\n",
"- Determine if a HOPR is warranted. \n",
"\n",
"## Table of Contents\n",
"\n",
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"By the end of this tutorial, you will: \n",
"- Compute aperture photometry on FLC frames acquired at three unique epochs and apply the new time-dependent inverse sensitivity (PHOTFLAM) keywords.\n",
"- Recompute aperture photometry on modified FLC frames with 'equalized' countrate values.\n",
"- Redrizzle the 'equalized' FLC frames and compute aperture photometry on the DRC products.\n",
"- Redrizzle the 'equalized' FLC frames and compute aperture photometry on the DRC products. \n",
"\n",
"## Table of Contents\n",
"[Introduction](#intro) <br>\n",
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"name": "python",
"nbconvert_exporter": "python",
"pygments_lexer": "ipython3",
"version": "3.11.6"
"version": "3.8.12"
}
},
"nbformat": 4,
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