WFC3 Thermal Vac Testing: UVIS Gain Results

Physics

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

Scientific paper

The integrated WFC3 instrument recently underwent testing under thermal vacuum (TV) conditions in the GSFC SES (Goddard Space Flight Center Space Environment Simulator). One of the tests was procedure UVIS03: relative gain as a function of temperature. Analysis of the UVIS03 data show that the gain ratios, relative to the nominal 1.5, are 1.01-1.04, 2.09-2.15, and 4.28-4.39 at a detector temperature of -82C. A check of the absolute gain of the nominal 1.5 setting was performed using flatfields from the linearity (UVIS05) test; gains were measured at 1.53, 1.52, 1.56, and 1.55, with errors <0.01, for quadrants A,B,C, and D.

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