On-Orbit Flat Fields and Absolute Calibration of STIS

Details On-Orbit Flat Fields and Absolute Calibration of STIS On-Orbit Flat Fields and Absolute Calibration of STIS

Jan 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996stis.rept...15b&link_type=abstract

Instrument Science Report STIS 96-015, 21 pages

Physics

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

Scientific paper

The Space Telescope Imaging Spectrograph (STIS) is a second generation HST instrument with three 2-dimensional detectors: a far-UV CsI MAMA, a near-UV CsTe MAMA, and a visible/near-IR CCD. STIS will obtain science data in both imaging and several spectroscopic modes, so that flat field corrections and absolute photometric calibrations are required for many different instrumental configurations. The basic calibration philosophy is to obtain the bulk of the flat field data from the internal calibration sources, while the deviation of the internal lamps from the external OTA illumination at the focal plane (i.e. "vignetting") will be measured by external sources in selected modes. Some of these external sources will be standard stars and will also define the absolute photometric sensitivity with the required ~1% internal consistency for all supported science modes and grating settings.

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