Discovery and spectrophotometry of the quasars in the -40 zone of the CTIO Curtis Schmidt survey.
Abstract
The paper considers the discovery and spectrophotometry of the quasars in the -40 deg zone of a Curtis Schmidt survey. 128 quasars were discovered, and spectroscopic observations with the SIT vidicon produced a spectral atlas which showed 90% of the candidates to be quasars and 80% to have z greater than 1.8. The quasars with unusual emission-line strengths, widths, or ratios are indicated, and 14 quasars with very strong absorption lines are mentioned along with quasars that may be large-amplitude variables. It is concluded that the new data confirm earlier results that the space density of the most luminous quasars is constant over the interval of z in the 1.9-3.25 range and is consistent with Schmidt's exponential density law.
- Publication:
-
The Astrophysical Journal Supplement Series
- Pub Date:
- February 1980
- DOI:
- 10.1086/190653
- Bibcode:
- 1980ApJS...42..333O
- Keywords:
-
- Astronomical Catalogs;
- Quasars;
- Stellar Spectrophotometry;
- Absorption Spectra;
- Emission Spectra;
- Line Spectra;
- Luminosity;
- Red Shift;
- Schmidt Cameras;
- Space Density;
- Tables (Data);
- Vidicons;
- Astrophysics