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Re-calibration of GSC2.3 with UCAC2

Published online by Cambridge University Press:  01 October 2007

Z. H. Tang ,
Z. X. Qi ,
Y. Yu ,
R. L. Smart ,
B. Bucciarelli ,
M. G. Lattanzi  and
A. Spagna
Z. H. Tang
Affiliation:
Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai 200030, China email: zhtang@shao.ac.cn
Z. X. Qi
Affiliation:
Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai 200030, China email: zhtang@shao.ac.cn Graduate School of the Chinese Academy of Sciences, Beijing 100039, China
Y. Yu
Affiliation:
Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai 200030, China email: zhtang@shao.ac.cn
R. L. Smart
Affiliation:
INAF-Astronomical Observatory of Turin, Pino-Torinese 2010025, Italy
B. Bucciarelli
Affiliation:
INAF-Astronomical Observatory of Turin, Pino-Torinese 2010025, Italy
M. G. Lattanzi
Affiliation:
INAF-Astronomical Observatory of Turin, Pino-Torinese 2010025, Italy
A. Spagna
Affiliation:
INAF-Astronomical Observatory of Turin, Pino-Torinese 2010025, Italy
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Abstract

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To make GSC-II more accurate and useful, it is necessary to re-calibrate GSC-II when a better reference catalogue (UCAC2) is available. With UCAC2 as the reference, preliminary re-calibration of some sample plates from GSC2.3 were carried out with different methods, such as Global, Mask and Filter. The results indicate that a 7th-order polynomial is sufficient to account for the influence of Schmidt plate deformation on the measured coordinates of stars. The magnitude equation can be eliminated after correcting for a common magnitude equation. The RMS of the re-calibrated data is around ±0.2~0.3 arcsec.

Keywords

astrometrycatalogssurveys
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 3 , Symposium S248: A Giant Step: from Milli- to Micro-arcsecond Astrometry , October 2007 , pp. 334 - 336
Copyright
Copyright © International Astronomical Union 2008

References

Zacharias, , et al. 2004, AJ, 127, 3043CrossRefGoogle Scholar
Jeffrey, R. P., et al. 2003, AJ, 125, 1559Google Scholar
Dick, W. R., et al. 1991, AN, 312, 113, 120Google Scholar
Bucciarelli, B., et al. 2008, this volume, p. 316Google Scholar