An Astrometric Calibration Field Near the Ecliptic Pole

Details An Astrometric Calibration Field Near the Ecliptic Pole An Astrometric Calibration Field Near the Ecliptic Pole

Jul 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005hst..prop10753r&link_type=abstract

HST Proposal ID #10753

Astronomy and Astrophysics

Astronomy

Hst Proposal Id #10753

Scientific paper

This program will obtain deep ACS astrometry of a Large Magellanic Cloud star field lying within the planned continuous viewing zone of the James Webb Space Telescope, which extends to a 5 degree radius from the Ecliptic pole. To allow a full astrometric solution to be calculated, controlling for distortions within ACS that may be time variable over periods of months to years, we will observe our target field at two distinct roll angles separated by approximately 90 degrees. To help control for large scale distortions, we will "chop" the observations in at least one roll angle, using offsets of order half the ACS field of view.

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