Comparison of GSC photometry in three southern fields

Details Comparison of GSC photometry in three southern fields Comparison of GSC photometry in three southern fields

Jul 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990aj....100..280r&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 100, July 1990, p. 280-289.

Astronomy and Astrophysics

Astronomy

3

Astronomical Catalogs, Astronomical Photometry, Southern Sky, Star Distribution, Regression Analysis, Sky Surveys (Astronomy), Stellar Magnitude

Scientific paper

Entries in the Guide Star Catalog (GSC) within three southern declination fields surveyed by Ratnatunga in 1983 are studied. All three fields have high galactic latitude. About 98 percent of the 13,540 GSC entries within the total survey area of 60 deg sq are cross identified. Using over 9000 stars in the magnitude range J between 12.5 and 15.5, the random rms precision in photometric magnitude within these fields is estimated to be 0.1-0.2 mag, much lower than the total rms accuracy of 0.4 mag estimated in GSC. Some of the scanned images of the remaining unmatched entries were visually inspected to identify the cause of discrepancy.

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