Discovery of two bright low-redshift quasars by the Hamburg quasar survey.
Abstract
Two bright low-redshift quasars, HS 0624+6907 (V = 14.2^m^, z = 0.370) and HS 1227+4530 (V = 16.3^m^, z = 0.194) have been discovered by follow-up spectroscopy of candidates selected from objective prism plates of the Hamburg Schmidt sky survey. Accordingly, HS 0624+6907 is the brightest quasar discovered by optical selection. Its spectrum and absolute magnitude (M = -28.0^m^) closely resemble those of 3C273 except for the presence of very narrow O III-emission lines. HS 1227+4530 is less luminous (M = -24.0^m^). We discuss the possibility that some bright low-redshift quasars have escaped detection because their objective-prism spectra are similar to those of subluminous F stars.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- October 1989
- Bibcode:
- 1989A&A...223L...1G
- Keywords:
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- Astronomical Spectroscopy;
- Quasars;
- Red Shift;
- Sky Surveys (Astronomy);
- Emission Spectra;
- Luminosity;
- Magnitude;
- Spectral Line Width;
- Astrophysics