IR Dark Monitor
Abstract
Analysis of ground and on-orbit observations has shown that dark current is most effectively removed from external science images when using a composite dark calibration image created from a number of individual dark calibration images taken with the same sample sequence, exposure time, and aperture. Regular collection of dark calibration frames for all sample-sequence/aperture size combinations used by Cycle 19 IR-channel external observations is essential. They will be used to monitor variations in the dark current signal and will provide the input images necessary to generate timely, high-quality composite dark calibration frames which will be delivered to the calibration database system {CDBS} on an as-needed basis.
- Publication:
-
HST Proposal
- Pub Date:
- October 2011
- Bibcode:
- 2011hst..prop12695D