ACS SBC Geometric Distortion Calibration

Details ACS SBC Geometric Distortion Calibration ACS SBC Geometric Distortion Calibration

Jul 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001hst..prop.9027h&link_type=abstract

HST Proposal ID #9027

Computer Science

Hst Proposal Id #9027

Scientific paper

This activity will obtain a series of images to evaluate the geometric distortion over the field of view of the ACS SBC channel, after its image quality has been optimized with the corrector mechanism. Images will be obtained in filter F125LP, with a pattern of POS-TARG offsets in each axis. These data will be complemented by the images of the same field obtained in proposal 9024, "ACS SBC Flat Field Strability", which utilizes a similar image offsetting technique at larger spatial scales. The observations may be scheduled back-to-back with those from proposal 9024. NGC 6681 {18.7 h, -32 deg} will be the target, as this star field has been used extensively by the STIS program for UV PSF measurement and photometry.

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