SDSS Primary Standards

Details SDSS Primary Standards SDSS Primary Standards

Jul 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002hst..prop.9664g&link_type=abstract

HST Proposal ID #9664

Physics

Hst Proposal Id #9664

Scientific paper

The ACS HRC and WFC cameras have Sloan Digital Sky Survey standard filters, the first use of these on HST. Calibration of the u, g, r, i, z filters in ACS will be obtained in order to assure that observers can place HST and SDSS observations on a common system. The SDSS has adopted the 10th magnitude star, BD+17D4708 as their fundamental reference. STIS calibration spectra of this will be obtained over the full 0.2-1.0+ micron range covered by G230LB, G430L and G750L in order to generate a reference spectrum of this star in the HST system in order for SYNPHOT to generate robust synthetic magnitudes {the STIS observations are through the STIS program, 9631, Bohlin PI}. ACS observations will be obtained through the SDSS filters in order to reference u, g, r, i, z photometry to the same fundamental standard used by SDSS. In addition, since this will become a useful additional standard star, we will also obtain observations through the full suite of ACS UV-optical filters in order to assist photometric transformations between different systems.

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