PC 0910+5625: an Optically Selected Quasar with a Redshift of 4.04
Abstract
The authors report the discovery of the second quasar with a redshift greater than 4. This object, which has an r magnitude of 21.0, was detected on a CCD grism survey. The spectrum of the quasar has strong, relatively narrow (but resolved) emission lines; there is a deep absorption trough ≡100 Å wide on the blue wing of the Lyman-α line; and the continuum at wavelengths shorter than the absorption feature is far weaker that the level present redward of Lyman-α.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- October 1987
- DOI:
- 10.1086/184996
- Bibcode:
- 1987ApJ...321L...7S
- Keywords:
-
- Emission Spectra;
- Quasars;
- Red Shift;
- Spectrum Analysis;
- Astronomical Photometry;
- Lyman Alpha Radiation;
- Spectral Resolution;
- Astronomy;
- COSMOLOGY;
- QUASARS