WFC3 SMOV Program 11433: IR Internal Flat Field Observations

Details WFC3 SMOV Program 11433: IR Internal Flat Field Observations WFC3 SMOV Program 11433: IR Internal Flat Field Observations

Oct 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009wfc..rept...42h&link_type=abstract

Instrument Science Report WFC3 2009-42, 22 pages

Computer Science

Hubble Space Telescope, Hst, Space Telescope Science Institute, Wide Field Camera 3, Wfc3

Scientific paper

We have analyzed the internal flat field behavior of the WFC3/IR channel using data obtained during the Servicing Mission Observatory Verification (SMOV) for Program 11433. The detector was illuminated to a high signal level through each filter using the Tungsten 2 lamp. Comparison of the resulting flat field images to those collected during ground testing reveals similar illumination patterns, and an increase in the Tungsten lamp flux of 6-10%. Signal rates show that the lamp's irradiance was constant to within 0.5% during these observations. These data show that the on-orbit internal flats can be used to update the calibration flat field images. Roughly 30% of the observations associated with this proposal were contaminated by a light leak while HST was pointed at the Earth. There is currently no strategy aimed at mitigating the effects of this light leak.

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