Evolution of WFPC2 Superbiases

Details Evolution of WFPC2 Superbiases Evolution of WFPC2 Superbiases

May 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008wfpc.rept....2t&link_type=abstract

Instrument Science Report WFPC2 2008-02, 19 pages

Physics

Hubble Space Telescope, Hst, Space Telescope Science Institute, Wfpc2

Scientific paper

We examine the evolution of the WFPC2 superbiases from 1996 to 2007. Relatively little change is seen, implying generally good stability of the readout electronics during the 14+ years of WFPC2 mission. Most of the observed change results from the evolution of the dark current contained in the bias frames. The 2007 superbias also shows reduced row-to-row fluctuations in the WF4 CCD, which is a side-effect of the software used to remove the horizontal streaks associated with the WF4 anomaly.

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