GHRS Ssa Peakup - 2

Details GHRS Ssa Peakup - 2 GHRS Ssa Peakup - 2

Jul 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992hst..prop.4926s&link_type=abstract

HST Proposal ID #4926

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Hst Proposal Id #4926

Scientific paper

Flight software 4.0 includes an important new capability for the GHRS--return to brightest point following a spiral search. This is now the default target acquisition mode. A successful test of this capability has permitted another important new capability to be implemented--the SSA PEAKUP. The SSA PEAKUP allows for centering of a target in the SSA--this capability had been lost due to the spherically-aberrated PSF being much larger than the SSA. Now, by using the return to brightest point algorithm, a spiral search of small size will be used to 'find' the center of the target image and place it in the center of the SSA. This proposal is a slight modification of the sensitivity monitoring proposal (4124). In this version we include duplicated LSA and SSA exposures to define the SSA photometric sensitivity.

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