Temperature Reductions toMitigate the WF4 Anomaly

Details Temperature Reductions toMitigate the WF4 Anomaly Temperature Reductions toMitigate the WF4 Anomaly

Apr 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007wfpc.rept....1d&link_type=abstract

Instrument Science Report 2007-01, 7 pages

Computer Science

Performance

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

Scientific paper

The WF4 anomaly is characterized by low or zero bias levels, faint horizontal streaks,and low photometric counts (reduced gain) on the WF4 detector. In an effort to mitigate these effects, the temperature of the WFPC2 electronics has been reduced three timessince January 2006. Each temperature reduction has temporarily restored the WF4 biasand gain to near-normal (pre-anomaly) levels with no significant degradation of instrument performance. As the underlying electronics failure progresses, additional temperature adjustments will be necessary.

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