WFPC2 Clocks-ON Close Out

Details WFPC2 Clocks-ON Close Out WFPC2 Clocks-ON Close Out

Jan 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002wfpc.rept....1s&link_type=abstract

Instrument Science Report 2002-01, 14 pages

Computer Science

Hubble Space Telescope, Hst, Space Telescope Science Institute, Wide Field Camera 2, Wfc2

Scientific paper

We present results from an analysis of WFPC2 standard star observations and dark frames obtained with the serial clocks ON. The photometric calibration accuracy of WFPC2 is monitored by observing the white dwarf standard star GRW+70D5824 (HIC 66578; DA; V=12.77; B-V=-0.09) with serial clocks OFF. However, a few tests of the clocks ON mode have been performed, including a recent Cycle 10 calibration program (9252). A comparison of the clocks ON and OFF photometric observations show that there is no significant difference between the results of the two modes. A comparison of the dark frames taken with serial clocks ON and OFF does, however, reveals a small difference (a few %) in the dark current between the two modes.

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