Calibration of Geometric Distortion in the ACS Detectors

Details Calibration of Geometric Distortion in the ACS Detectors Calibration of Geometric Distortion in the ACS Detectors

2002-12-09

arxiv.org/abs/astro-ph/0212208v1

Astronomy and Astrophysics

Astrophysics

to appear in "Proceedings of the 2002 HST Calibration Workshop", S. Arribas, A. Koekemoer, and B. Whitmore, eds.; 4 pages, 2 f

Scientific paper

The off-axis location of the Advanced Camera for Surveys (ACS) is the chief (but not sole) cause of strong geometric distortion in all detectors: the Wide Field Camera (WFC), High Resolution Camera (HRC), and Solar Blind Camera (SBC). Dithered observations of rich star cluster fields are used to calibrate the distortion. We describe the observations obtained, the algorithms used to perform the calibrations and the accuracy achieved.

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