Determination of Low-Frequency Flat-Field Structure from Photometry of Stellar Fields
Abstract
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.
- Publication:
-
Instrument Science Report ACS 2003-10
- Pub Date:
- September 2003
- Bibcode:
- 2003acs..rept...10V
- Keywords:
-
- Hubble Space Telescope;
- HST;
- Space Telescope Science Institute;
- Advanced Camera for Surveys;
- ACS;
- STScI