MAMA Bright Object Checking: Experience from Cycle 7 and Recommendations for Cycle 8

Details MAMA Bright Object Checking: Experience from Cycle 7 and Recommendations for Cycle 8 MAMA Bright Object Checking: Experience from Cycle 7 and Recommendations for Cycle 8

Mar 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998stis.rept....8l&link_type=abstract

Instrument Science Report STIS 98-08, 6 pages

Physics

Hubble Space Telescope, Hst, Space Telescope Science Institute, Stis, Space Telescope Imaging Spectrograph

Scientific paper

The observed maximum local and global count rates of all STIS MAMA exposures during SMOV and Cycle 7 until February 1998 have been analyzed. There are no exposures reaching the trigger limit of the onboard safety mechanisms. No local screening limit violations are found but two targets slightly exceed the echelle global screening limits of 200,000 counts/sec. No revisions to the existing screening procedures are necessary. We recommend somewhat less conservative local rate screening limits of 100 counts/sec/pixel and 75 counts/sec/pixel for both MAMAs in undispersed and dispersed modes during Cycle 8, respectively. No changes to the global screening limits are recommended.

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