FOC Plate Scale - Revised

Details FOC Plate Scale - Revised FOC Plate Scale - Revised

Jul 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991hst..prop.2807p&link_type=abstract

HST Proposal ID #2807

Astronomy and Astrophysics

Astronomy

Hst Proposal Id #2807

Scientific paper

The aim of these tests is to measure the plate scale of the FOC f/48 and f/96 modes. This will be achieved by imaging a pair of astrometric stars (separation 10.5") in the full (512x1024 zoomed) format and the centered (512x512 normal) format of both the f/48 and the f/96 cameras. This sequence of observations will be repeated twice at intervals not less than 4 weeks and not greater than 8 weeks. The change in telescope roll angle over this period will rotate this pair of stars relative to the photocathode and will unambiguously define the platescale for both relays. The observations will be analyzed off-line using CDBS, and the analysis will be used to update the FOC reference files in SOGS.

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