Physics
Scientific paper
Jul 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002hst..prop.9603n&link_type=abstract
HST Proposal ID #9603
Physics
Hst Proposal Id #9603
Scientific paper
This proposal obtains reference point source Transfer Functions {S-Curves} for FGS1r through the F583W filter and the F5ND attenuator at the center position of the FGS1r FOV for a variety of stars with different stellar spectral colors. The data will be added to the library of point source interferograms that was assembled from the Cycles 8 and 9 calibration programs. These Transfer Functions are needed to support the analysis of GO science data for the study of close and wide binary star systems and for determining the angular size and shape of extended sources. This proposal observes stars that have been observed in previous cycles to check for long term temporal stability of the FGS1r S-curves. This proposal monitors the cycle 10 calibration the FGS1r Lateral Color response {using stars Latcol-A and Latcol-B}, as well as calibrates the "Pos/Trans" bias of a star's position as determined from Transfer mode and Position mode observations, and finally the shift of a star's centroid when observed with F5ND relative to that when observed with F583W {the cross filter shift} is calibrated for the fainter stars in this proposal {stars brighter than V=8 can not be observed with F583W.}
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