Photometric Cross-Calibration using Stellar Flux Standards

Details Photometric Cross-Calibration using Stellar Flux Standards Photometric Cross-Calibration using Stellar Flux Standards

Jul 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008hst..prop11889b&link_type=abstract

HST Proposal ID #11889. Cycle 17

Physics

Scientific paper

a} Verify the ACS HRC and WFC photometric calibrations with a repeat visit to one of the three primary WDs. b} Measure the change in sensitivity with time for bright stars, {which would include any small CTE contributions.} c} Continue to investigate the 2% discrepancy between ACS flux calibration and that of STIS {ACS ISR 2007-06}. The goal is to measure any filter bandpass shifts in ACS or rule out the possibility of shifts as the primary contributors to the ACS/STIS discrepancy for cool stars.;

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