SBC Internal Lamp P-flat Monitoring
Abstract
We report on a Cycle 23 calibration program to monitor the status of the SBC P-flat. We find random pixel to pixel changes to be small, with only 2% of pixels having changed by more than 3. There are coherent changes that we measure to be above the poisson errors, in some regions as high as 4% peak to peak. We recommend that the ACS team obtain new observations in order to create a new P-flat. We also measured the degradation of the deuterium lamp used to create internal flats. The brightness of the lamp is currently 65% of its initial level, the degradation being dependent on lifetime usage.
- Publication:
-
Instrument Science Report ACS 2016-02
- Pub Date:
- March 2016
- Bibcode:
- 2016acs..rept....2A
- Keywords:
-
- Hubble Space Telescope;
- Space Telescope Science Institute;
- STScI;
- HST