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GSC 1.2 — A Subplate Reduction of the GSC

Published online by Cambridge University Press:  26 July 2016

B. Bucciarelli ,
J.B. Doggett ,
C.R. Sturch ,
B.M. Lasker ,
B.J. McLean ,
M.G. Lattanzi  and
L.G. Taff
B. Bucciarelli
Affiliation:
Space Telescope Science Institute, Baltimore, MD 21218, U.S.A.
J.B. Doggett
Affiliation:
Space Telescope Science Institute, Baltimore, MD 21218, U.S.A.
C.R. Sturch
Affiliation:
Space Telescope Science Institute, Baltimore, MD 21218, U.S.A. Astronomy Programs, Computer Sciences Corporation
B.M. Lasker
Affiliation:
Space Telescope Science Institute, Baltimore, MD 21218, U.S.A.
B.J. McLean
Affiliation:
Space Telescope Science Institute, Baltimore, MD 21218, U.S.A.
M.G. Lattanzi
Affiliation:
Space Telescope Science Institute, Baltimore, MD 21218, U.S.A. Astrophys. Dept. SSD, ESA, on leave from Osservatorio Astronomico di Torino
L.G. Taff
Affiliation:
Space Telescope Science Institute, Baltimore, MD 21218, U.S.A.

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The original version of the HST Guide Star Catalog (GSC 1.0, Lasker et al. 1990, and following papers) contains systematic errors which typically begin from the plate center and increase with radius (Taff et al. 1990a). In a residual plot against CAMC stars this shows as high correlations between neighboring residuals. This is due to the inability of a global polynomial to map the metric of a Schmidt plate. A new reduction of the GSC measures (GSC 1.2) based on the subplate method (Taff 1989) is partially complete. We report on it for the northern data from the Palomar Quick V plates, with 20 minute exposures, nearly all taken in the 1982–1984 interval.

Type
Part Six: Calibration: Astrometric and Photometric
Information
Symposium - International Astronomical Union , Volume 161: Astronomy from Wide-Field Imaging , 1994 , pp. 277 - 279
Copyright
Copyright © Kluwer 1994 

References

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