Determination of Low-Frequency Flat-Field Structure from Photometry of Stellar Fields

Details Determination of Low-Frequency Flat-Field Structure from Photometry of Stellar Fields Determination of Low-Frequency Flat-Field Structure from Photometry of Stellar Fields

Sep 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003acs..rept...10v&link_type=abstract

Instrument Science Report ACS 2003-10, 21 pages

Physics

Hubble Space Telescope, Hst, Space Telescope Science Institute, Advanced Camera For Surveys, Acs, Stsci

Scientific paper

A method is presented for determination of the low-frequency flat-field (L-flat) structure from photometry of a stellar field that is imaged multiple times with different pointing or roll. A numerical implementation of the algorithm is presented and its accuracy verified using tests with artificially generated data. The software was used to generate the L-flats currently in the ACS pipeline. Newly implemented features in the software should allow further improvements in these L-flats.

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