EXOSAT observations of three bright BL Lac objects.
Abstract
The BL Lac objects Mkn 421, Mkn 501 and 2A 1219+305 were observed by EXOSAT during February and March 1984. All three sources exhibited soft power law X-ray spectra characteristic of BL Lac objects. The low energy absorption of each source was found to be consistent with estimates of the line of sight column density through our Galaxy. Variability on a timescale ⪉days was apparent in Mkn 421 and 2A 1219+305 and on a somewhat longer timescale for Mkn 501.
- Publication:
-
X-ray Astronomy 1984
- Pub Date:
- 1985
- Bibcode:
- 1985xra..conf..467W
- Keywords:
-
- BL Lacertae Objects:X-Ray Spectra;
- X-Ray Spectra:BL Lacertae Objects