The redshift and magnitude distribution of faint quasars

Details The redshift and magnitude distribution of faint quasars The redshift and magnitude distribution of faint quasars

Aug 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980apj...240...10v&link_type=abstract

Astrophysical Journal, Part 1, vol. 240, Aug. 15, 1980, p. 10-19. NSF-supported research.

Astronomy and Astrophysics

Astrophysics

26

Cosmology, Luminosity, Quasars, Red Shift, Spectral Energy Distribution, Stellar Magnitude, Astronomical Spectroscopy, Microdensitometers, Optical Measurement, Telescopes

Scientific paper

Microdensitometry of survey plates obtained with a transmission grating on the KPNO 4 m telescope has produced magnitudes for 53 faint quasars. The results supplement and confirm 4 existing samples obtained with similar techniques. All such samples are summarized, giving a total of 467 quasars with redshifts. From this summary, the differential number counts of quasars do not increase by more than about 3.5 times per magnitude interval, fainter than 18th mag. Such an increase reflects primarily the luminosity function of quasars in the range 1.8-2.4.

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