Bias and dark calibration of ACS data

Physics

Scientific paper

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Hubble Space Telescope, Hst, Space Telescope Science Institute, Advanced Camera For Surveys, Acs, Bias, Dark Calibration

Scientific paper

We describe the routine production of the "superbias" and "superdark" reference files that are used to calibrate ACS science data in the pipeline (CALACS). These files are identified by the BIASFILE and DARKFILE keywords in the header of every ACS science image. We describe the primary bias and dark features contained in these files, and provide some guidance on how ACS users can produce even higher signal-to-noise calibrations for datasets with extraordinary calibration requirements (e.g. deep field observations).

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