WFPC2 CTE Characterization

Details WFPC2 CTE Characterization WFPC2 CTE Characterization

2002-12-04

arxiv.org/abs/astro-ph/0212117v1

Astronomy and Astrophysics

Astrophysics

2002 HST Calibration Workshop proceedings. 10 pages. Postscript copy with all figures from the author's web site, http://www

Scientific paper

The limiting factor of the accuracy of WFPC2 photometry is the CTE loss, which has increased to the level of 50% or more for faint stars at the top of the chips. I describe recent work on characterizing this effect, and provide improved equations for CTE correction. I also examine issues affecting background measurement, which if not done correctly can introduce artificial nonlinearities into photometry.

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