Physics
Scientific paper
Jul 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008hst..prop11872n&link_type=abstract
HST Proposal ID #11872. Cycle 17
Physics
Scientific paper
This proposal uses FGS1r in Treansfer mode to observe four stars with B-V values 0.2, 0.6, 1.4, and 2.0, to form the basis of the FGS point source library of interference fringes as a function of a star's spectral color. This library will be used to analyze binary star science observations, and to monitor any long-term changes in the FGS1r S-curves. In addition, this proposal uses FGS1r in Position mode to observe the B-V = 0.2 and 2.0 stars and several nearby reference stars, all of which "fit" in the FGS1r pickle at the selected HST ORIENTs in visits 01 and 02. These Visits are to execute when the target field is in the anti-Sun direction {Dec 20-23, 2009}. The orient of visit 01 differs from that of visit 02 by 195 degrees so that the "lateral color" induced shift of the star's centroid can be determined as a function of B-V. Visit 03 {Upgren69} is to execute before SM4. Visit 04 {HD233877} is to execute Feb-April 2010 as a stability monitor.;
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