STIS-19 FUV MAMA Dark Measure

Details STIS-19 FUV MAMA Dark Measure STIS-19 FUV MAMA Dark Measure

Jul 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008hst..prop11390p&link_type=abstract

HST Proposal ID #11390. Cycle 17

Computer Science

Scientific paper

The STIS MAMA HV power supplies are turned on only during each day?s block of SAA-free orbits. The FUV MAMA dark current glow has been determined to increase with the length of time the FUV HV power supply has been on. The rate of this daily increase has changed over the years and also appears to be sensitive to temperature. To measure the rate at which the dark current increases, as soon as possible after the completion of STIS-17 {11350} completes a series of five 1380s FUV MAMA dark exposures spread over 5 or more orbits of a single SAA period will be taken. A second block of five exposures should be done near the end of the SMOV period when the temperature of the aft shroud and STIS are in the range expected for normal Cycle 17 operations.;

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