Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981apjs...46..117u&link_type=abstract
Astrophysical Journal Supplement Series, vol. 46, June 1981, p. 117-139.
Astronomy and Astrophysics
Astronomy
61
Blue Stars, Milky Way Galaxy, Quasars, Stellar Magnitude, Ultraviolet Astronomy, White Dwarf Stars, Astronomical Catalogs, Astronomical Photography, Astronomical Photometry
Scientific paper
Objects have been selected for relative ultraviolet excess from a Palomar Schmidt field centered on Kapteyn Selected Area 57, near the north galactic pole. Object selection to B = 20 mag has been made by a novel semiquantitative technique, permitting a two parameter color classification. All known quasars in the field have been rediscovered. Four new quasars are reported here. The integral number counts of the listed objects are given as a function of their assigned color classes. The population of objects belonging to color classes 1A, 1, and 1B should be comprised primarily of quasars and white dwarfs and should be virtually complete to B = 18.5 mag.
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