AstroDither: Drizzling with Astrometry Included

Details AstroDither: Drizzling with Astrometry Included AstroDither: Drizzling with Astrometry Included

Jan 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21914515f&link_type=abstract

American Astronomical Society, AAS Meeting #219, #145.15

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Scientific paper

We present a new package of programs for aligning and drizzling HST images. AstroDither works on the principle that all astrometric and distortion information should be included in the calibrated image. Large external astrometric calibration files are no longer required. If the user wishes, multiple astrometric solutions can be contained in one header, and full astrometric solutions, including all distortion information, can be passed to other users or back as small FIITS files which we call headerlets. This approach greatly simplifies aligning images to each other or to external catalogs, and has allowed us to replace MultiDrizzle with a new program, AstroDrizzle, that handles absolute astrometry more naturally and with greater accuracy.

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