Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990mnras.243..692m&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 243, April 15, 1990, p. 692-712. Research supported by
Astronomy and Astrophysics
Astronomy
378
Astronomical Photometry, Galactic Mass, Image Analysis, Sky Surveys (Astronomy), Stellar Structure, Galactic Clusters, Galactic Evolution, Hubble Constant, Photographic Plates, Spatial Distribution
Scientific paper
A survey of 20 million images brighter than b(j) = 22 in an area of 4300 sq degrees covering the southern galactic cap is constructed. The survey is based on 185 contiguous, high galactic latitude UKSTU J survey plates which have been digitized. This paper describes the image analysis and parameterization used. The accuracy of the resulting measurements is assessed by comparing repeat scans of fields, comparing original plates to copy plates, and comparing the areas of overlap between neighboring fields. The image surface brightness profiles are used to distinguish galaxies from stars and merged images. The completeness of the galaxy sample and the contamination from stellar images is estimated from extensive visual checks of the plates.
Efstathiou George
Loveday Jon
Maddox Steve J.
Sutherland Will J.
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