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.
@article{arxiv.astro-ph/0212208,
title = {Calibration of Geometric Distortion in the ACS Detectors},
author = {G. R. Meurer and D. Lindler and J. P. Blakeslee and C. Cox and A. R. Martel and H. D. Tran and R. J. Bouwens and H. C. Ford and M. Clampin and G. F. Hartig and M. Sirianni and G. de Marchi},
journal= {arXiv preprint arXiv:astro-ph/0212208},
year = {2007}
}
Comments
to appear in "Proceedings of the 2002 HST Calibration Workshop", S. Arribas, A. Koekemoer, and B. Whitmore, eds.; 4 pages, 2 figures each containing two panels