WFC3 Ambient-2 Testing: Calibration Subsystem Performance

Details WFC3 Ambient-2 Testing: Calibration Subsystem Performance WFC3 Ambient-2 Testing: Calibration Subsystem Performance

May 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007wfc..rept...14b&link_type=abstract

Instrument Science Report WFC3 2007-14, 19 pages

Physics

Hubble Space Telescope, Hst, Space Telescope Science Institute, Wide Field Camera 3, Wfc3, Ambient Calibration Tests, Uvis-2 Detector

Scientific paper

This report summarizes the behavior of the calsystem in the UVIS, based upon the recent ambient calibration tests (April 2007) using the UVIS-2 detector. Due to schedule constraints, only a small subset of the nominal UVIS calsystem tests were run; no IR data were acquired. The illumination patterns and features observed in the tungsten and deuterium data are described and the characteristics of the flatfields are evaluated in light of the calsystem requirements. Based on the limited dataset, the UVIS calsystem, both tungsten and deuterium, satisfies the uniformity specification (< factor of two over the full field of view), meets the flux requirement (>16.7 e-/s/pix) for all but one filter (FQ437N quad filter+deuterium lamp at medium currenty yields ~12 e-/s/pix), and fulfills the short-term stability needs (better than 1% over one hour).

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