WFC3 TV2 Testing: IR Channel Non-linearity Correction and Unstable Pixel Masking

Details WFC3 TV2 Testing: IR Channel Non-linearity Correction and Unstable Pixel Masking WFC3 TV2 Testing: IR Channel Non-linearity Correction and Unstable Pixel Masking

Nov 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007wfc..rept...25h&link_type=abstract

Instrument Science Report WFC3 2007-25, 15 pages

Physics

Hubble Space Telescope, Hst, Space Telescope Science Institute, Wide Field Camera 3, Wfc3, Thermal Vacuum 2, Tv2

Scientific paper

Using data taken during WFC3's Thermal Vacuum 2 (TV2) testing campaign, we have characterized the non-linearity of the IR-1 detector. Cubic polynomials were used to fit the signal and produce correction coefficients to remove the non-linearity effects. We have also created a mask that identifies pixels with non-nominal behavior. This population of pixels represents 4.1% of the total number of active pixels in the IR channel, and should be ignored in subsequent data analyses. A minimum of 5.2% of the active pixels fail to meet the CEI Spec for a saturation level above 70,000 e-.

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