Improved Sensitivity SBC Prisms

Details Improved Sensitivity SBC Prisms Improved Sensitivity SBC Prisms

Jul 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006hst..prop11056w&link_type=abstract

HST Proposal ID #11056. Cycle 15

Physics

Scientific paper

The flux calibration of the SBC PR110L and PR130L will be improved by observing for each prism white dwarf standards WD1657+343 and LTT9491. The blue standard star WD1657+343 has previously been observed with ACS/SBC and will serve as a reference point to track time dependent variations. LTT9491 is much redder and thus will be used to investigate the sensitivity curve of ?red? targets to check for a potential red leak of the SBC. Additionally, LTT9491 shows various strong absorption lines which can be used to confirm the wavelength calibration of the PR110L and PR130L prisms. The standard stars are observed at a variety of pointings across the SBC detector in order to map spatial variations. LTT9491 will also be observed with ACS/HRC PR200L to obtain an improved flux calibration from about 1800 A to 4000 A.

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