Statistics – Computation
Scientific paper
Aug 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993kfnt....9...86r&link_type=abstract
Kinematika i Fizika Nebesnykh Tel (ISSN 0233-7665), vol. 9, no. 4, p. 86-94.
Statistics
Computation
1
Distortion, Photographic Measurement, Photographic Plates, Pleiades Cluster, Schmidt Telescopes, Astrometry, Astronomical Catalogs, Astronomical Observatories
Scientific paper
The plates of the Pleiades cluster obtained with the Schmidt telescope (80/120/240) at Baldone, Latvia, were reduced. A mean radial distortion coefficient of -5.5 x 10 exp -8/sq mm is computed on the basis of measurements of 244 stars from the PPM catalog in the 4.2 x 4.2 deg field. The reduction errors are shown to decrease by a factor of two when the distortion in the measured star coordinates is taken into account; in this case the complicated reduction polynomials do not yield a substantial gain in coordinate computation accuracy as compared to the linear model.
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