A preliminary look at astrometric accuracy as a function of photon counts

Details A preliminary look at astrometric accuracy as a function of photon counts A preliminary look at astrometric accuracy as a function of photon counts

Nov 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985aj.....90.2397g&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 90, Nov. 1985, p. 2397, 2398. Research supported by the Allegheny Observatory and Un

Astronomy and Astrophysics

Astronomy

5

Astrometry, Astronomical Photometry, Photons, Accuracy, Position (Location)

Scientific paper

The importance of photon counts as a factor in the accuracy of astrometric positions is illustrated by a preliminary look at data collected with the Allegheny Observatory's photon-counting detector, the Multichannel Astrometric Photometer. Twenty estimates are plotted of the standard errors, per hour, of astrometric positions obtained with the photometer and the blue-light lens of the observatory's 30-inch refractor. The agreement between the estimated standard errors in the X and Y coordinates supports the conclusion that, as predicted by Drake, the accuracy is dependent upon the count rate.

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