ACS CCD Image Quality Verification

Details ACS CCD Image Quality Verification ACS CCD Image Quality Verification

Jul 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001hst..prop.9015h&link_type=abstract

HST Proposal ID #9015

Physics

Hst Proposal Id #9015

Scientific paper

This program will obtain a series of images to evaluate the point source image quality over the fields of view of the ACS HRC and WFC channels in normal imaging {non-coronagraphic} mode, after the corrector mechanisms have been used to optimize the image focus and symmetry. A moderate density open cluster, NGC-188, will be the target, since it is available year-round and has suitable density and magnitude distribution. Images will be obtained in the F502N and F625W filters, with 0.5 px dithers in each axis of the WFC to improve PSF sampling. Larger { 10 arcsec} POS-TARG offsets will be used to improve the sampling over the HRC field, while maintaining mean star separation {>5 arcsec} adequate for PSF evaluation to a reasonable radius.

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