Ultraviolet and X-ray observations of the BL Lac PKS 0548-322.
Abstract
Spectrophotometric observations of the BL Lac object PKS 0548-322 were made with ultraviolet and X-ray instruments on the IUE and HEAO-2 satellites. Two observations in each spectral region, one set of which was obtained simultaneously are presented. A power law of energy index approximately 1.0 gives a good description of the data from ultraviolet through X-ray frequencies. This source is reported to be variable on short timescales (Gilmore 1980); the implications of the spectral properties and apparent variability are discussed in light of a relativistic jet model. Findings support the jet picture of BL Lac objects.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- October 1982
- DOI:
- 10.1086/160311
- Bibcode:
- 1982ApJ...261...12U
- Keywords:
-
- Astronomical Spectroscopy;
- Bl Lacertae Objects;
- Ultraviolet Spectra;
- X Ray Spectra;
- Heao 2;
- Infrared Spectra;
- Iue;
- Quasars;
- Relativistic Theory;
- Spectrum Analysis;
- Astrophysics