Flats: Preliminary HRC Data and On-Orbit Plans

Details Flats: Preliminary HRC Data and On-Orbit Plans Flats: Preliminary HRC Data and On-Orbit Plans

Apr 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999acs..rept....1b&link_type=abstract

Instrument Science Report ACS 99-01, 25 pages

Computer Science

Hubble Space Telescope, Hst, Space Telescope Science Institute, Advanced Camera For Surveys, Acs, Stsci

Scientific paper

The Advanced Camera for Surveys (ACS) has three detectors: a large format 4096x4096 CCD Wide Field Channel (WFC), a 1024x1024 CCD High Resolution Channel (HRC), and a 1024x1024 MAMA Solar Blind Channel (SBC). The flat field baseline goal is to obtain a complete set of pixel-to-pixel P-flats before launch and to use the onboard lamps to track changes. A second goal of the ground calibration program is to obtain the low frequency L-flat variation over the field of view. Changes in the L-flats can be determined from dithered observations of star fields on orbit. An overall precision of better than 1% per resolution element in the combined fine and coarse flat field structure is required.

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