CCD Full-Field Sensitivity Monitor C17

Details CCD Full-Field Sensitivity Monitor C17 CCD Full-Field Sensitivity Monitor C17

Jul 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008hst..prop11854p&link_type=abstract

HST Proposal ID #11854. Cycle 17

Astronomy and Astrophysics

Astronomy

Scientific paper

Measure a photometric standard star field in Omega Cen in 50CCD mode every few months to monitor CCD sensitivity over the whole field of view. Keep the spacecraft orientation within a suitable range {+/- 5 degrees} to keep the same stars in the same part of the CCD for every measurement. This test will give a direct transformation of the 50CCD magnitudes to the Johnson-Cousins system for red sources. These transformations should be accurate to 1%. The stability of these transformations will be measured to the sub-percent level. These observations also provide a check of the astrometric and PSF stability of the instrument over its full field of view.;

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