WFC3 UVIS Full Well Depths, and Linearity Near and Beyond Saturation

Details WFC3 UVIS Full Well Depths, and Linearity Near and Beyond Saturation WFC3 UVIS Full Well Depths, and Linearity Near and Beyond Saturation

Jul 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010hstc.worke..63g&link_type=abstract

"2010 Space Telescope Science Institute Calibration Workshop - Hubble after SM4. Preparing JWST, held 21-23 July 2010 at Space T

Physics

Scientific paper

Maps of full well depth ranging from 63-72K electrons are presented. Both ACS and STIS showed excellent linearity beyond saturation when the gain used sampled full well - one simply needs to sum over all the pixels bled into to recover accurate photometry. I show that WFC3/UVIS photometry requires a simple calibration to obtain good results beyond saturation. With this calibration it is possible to recover photometry for saturated point sources to near 1% even for stars that are 7 magnitudes beyond saturation.

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