WFC3/UVIS Read Noise Aug 2009 - Apr 2017
Abstract
This report updates the study of the WFC3/UVIS read noise using data taken over a period from August 2009 to June of 2017. The read noise was measured using full-frame UVIS bias images and computed over the main CCD image area. Overall the read noise has increased by 0.06 to 0.075 e- (a 2%-2.6% increase since 2010 - 0.01 electrons per year) and the trends remain linear with no deviations or sudden changes. The increases in read noise are an indirect measure of the CTE degradation as well as the growth in the number of hot pixels.
- Publication:
-
Space Telescope WFC Instrument Science Report
- Pub Date:
- June 2017
- Bibcode:
- 2017wfc..rept...17K
- Keywords:
-
- Hubble Space Telescope;
- HST;
- Space Telescope Science Institute;
- STScI;
- WFC3;
- UVIS;
- read noise;
- calibration