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Hubble Space Telescope
FOC Instrument Science Report 060

FOC Instrument Science Report 060 5/15/92

"FOC UV Flat Field Response"
by P. Greenfield

Abstract excerpted from report:

A description is given of the FOC calibration observations of the Orion
Nebula to obtain UV flat fields. The strategy of using multiple offset
exposures to remove Orion Nebula brigthness variations appears to be
successful in obtaining UV flat fields with accuracies (on larger scales)
of 1-2% for f/96 and 2-4% for f/48. Comparisons with ground-based
exposures indicate significant change in f/48 flat field characteristics,
consistent with previous comparisons using LEDs. Calibration reference
files for  RSDP have been generated and delivered.