FOC Absolute Sensitivity (F/48 Relay)

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Scientific paper

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Hst Proposal Id #4243

Scientific paper

The absolute DQE for the f/48 camera has not yet been directly measured in orbit. This has been in part due to the absence of faint enough standards. This proposal will attempt to correct this deficiency by observations of UV standard stars with combinations of filters and small formats to achieve count rates that are not seriously nonlinear. Because of the use of small formats, interactive acquisitions will be required as well as special commanding for nonstandard formats. Internal LED exposures will also be necessary to geometrically calibrate the nonstandard format and to tie its absolute response to those of other formats (there is a significant format- dependent response variation for f/48).

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