Calibrating the WFPC2 astrometry for MDS

Details Calibrating the WFPC2 astrometry for MDS Calibrating the WFPC2 astrometry for MDS

Jan 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997hstc.work..361r&link_type=abstract

The 1997 HST Calibration Workshop with a New Generation of Instruments, p. 361

Astronomy and Astrophysics

Astronomy

2

Calibrating, Astrometry, Data Processing, Image Processing, Distortion, Software Development Tools, Sky Surveys (Astronomy), Cosmic Rays, Cross Correlation, Precooling, Hubble Space Telescope, Cameras

Scientific paper

The Hubble Space Telescope (HST) Medium Deep Survey has optimized an automated procedure to associate and stack WFPC2 data. The coordinates listed in HST WFPC2 image and/or jitter file headers are often found to be insufficient to stack images for cosmic ray removal. We discuss results from software developed for the HST Medium Deep Survey (MDS) pipeline to evaluate these shifts by cross-correlation of the images. We will also discuss the distortion of the pre-cool-down WFPC2 field and attempts to derive absolute coordinates for MDS WFPC2 observations using the USNO-Al.0 half billion object catalog.

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