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VII/26D Uppsala General Catalogue of Galaxies (UGC) (Nilson 1973)
The following files can be converted to FITS (extension .fit .fit.Z .fgz)
catalog.dat errors.dat
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Query from: http://vizier.cds.unistra.fr/viz-bin/VizieR?-source=VII/26D
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Beginning of ReadMe :VII/26D Uppsala General Catalogue of Galaxies (UGC) (Nilson 1973)
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Uppsala General Catalogue of Galaxies (UGC)
Nilson P.
<Uppsala Astron. Obs. Ann. 6 (1973)>
=1973UGC...C......0N (SIMBAD/NED BibCode)
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ADC_Keywords: Galaxy catalogs
Description:
The Uppsala General Catalogue of Galaxies (UGC) is an essentially
complete catalogue of galaxies to a limiting diameter of 1.0' and/or
to a limiting apparent magnitude of 14.5 on the blue prints of the
Palomar Observatory Sky Survey (POSS). Coverage is limited to the sky
north of declination -02.5degrees. Galaxies smaller than 1.0' in
diameter but brighter than 14.5 mag may be included from the Catalogue
of Galaxies and of Clusters of Galaxies (CGCG, Zwicky et al.
1961-1968); all such galaxies in the CGCG are included in the UGC. The
galaxies are ordered by 1950 right ascension.
The catalogue contains descriptions of the galaxies and their
surrounding areas, plus conventional system classifications and
position angles for flattened galaxies. Galaxy diameters on both the
blue and red POSS prints are included and the classifications and
descriptions are given in such a way as to provide as accurate an
account as possible of the appearance of the galaxies on the prints.
Only the data portion of the published UGC is included in the
machine-readable version.
The order of the records is strictly by UGC number; i.e., the Addenda
records follow their main catalogue counterparts in the file. The
colons (indicating uncertainty) and various other codes (parentheses,
brackets) are not included in the machine-readable version of the
catalogue. Several possible improvements to the catalogue might
consist of adding codes corresponding to the published version, a
second file containing abbreviations and terminology and a third file
with the extensive notes. It would also be important to add an
asterisk or some other code to data records having a note in the
proposed third file.
This document describes the machine-readable version of the UGC as
distributed by the Astronomical Data Centers. It is intended to enable
users to read and process the data without problems or guesswork. For
additional details regarding the classifications, measurement of
apparent magnitudes, and data content, the source reference should be
consulted. A copy of this document should accompany any
machine-readable copy of the catalogue.