Calibration of ACS/WFC Half-Speed Readout Mode

Details Calibration of ACS/WFC Half-Speed Readout Mode Calibration of ACS/WFC Half-Speed Readout Mode

Jul 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008hst..prop11890g&link_type=abstract

HST Proposal ID #11890. Cycle 17

Computer Science

Performance

Scientific paper

This program is designed to assess and calibrate the performance of ACS/WFC using the half-speed {slow} readout mode {hereafter abbreviated "SRM"} to potentially reduce WFC readnoise. We will obtain calibration biases, darks, and lamp flats at both GAIN=1 and GAIN=2 in order to measure the SRM readnoise, gain, and linearity, as well as CTE and crosstalk using dark-frame hot pixels and cosmic ray hits. This program includes a repeat of SM4/ACS Proposal 11510 {PI M. Chiaberge} for observations of 47 Tuc with half-FOV sized dithers to check impact of CTE on photometry with SRM. For each pointing we will obtain 2 CR-SPLITs and 2-point dithering to allow cosmic ray and hot-pixel rejection and provide a set of "clean" stars for the CTE analysis.;

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