Physics
Scientific paper
Nov 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009wfc..rept...29b&link_type=abstract
Instrument Science Report WFC3 2009-29, 6 pages
Physics
Hubble Space Telescope, Hst, Space Telescope Science Institute, Wide Field Camera 3, Wfc3
Scientific paper
This report summarizes the gain results obtained from the SMOV UVIS Detector Functional program, proposal #11419. Based on internal calibration flatfields, the gain at the
nominal 1.5 setting was measured at 1.61, 1.61, 1.63, and 1.62 e-/DN, with errors <0.01 e- /DN, for quadrants A, B, C, and D, respectively. These values are ~3% higher than those measured in ground test images and to date have been stable on-orbit: a preliminary mea- surement of the recent Cycle 17 gain data (proposal 11906, PI Pavlovsky) yielded gains within 1% or better of the SMOV values. The off-nominal gain settings are restricted parameters and unavailable for general use, however, the SMOV proposal obtained data to check these settings on-orbit relative to the nominal 1.5 setting. The values for the off-nominal gains were measured at 1.04, 1.02, 1.04, 1.04 e-/DN and at 2.17, 2.12, 2.17, 2.16 e-/DN for the gain 1.0 and gain 2.0 settings. The exposure times for the gain 4.0 images were erroneously set too low to allow a determination of that setting; the observations were not repeated.
Baggett Sylvia
Borders Tiffany
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