The continuous spectrum of Markarian 421 during periods of X-ray satellite observations.
Abstract
New UBVRI photometry of Mrk 421 obtained during periods of X-ray satellite observations are presented. An X-ray light curve for 1977 November from the HEAO A-1 experiment is also given. The decomposition of the UBVR fluxes into a compact nonthermal component and an extended galactic component shows that there are coordinated variations in the optical nonthermal and X-ray emission. The data are consistent with the hypothesis that the mini-BL Lac object is emitting by the synchrontron-self-Compton process. The host galaxy of this composite source has properties like those of a giant elliptical.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- October 1980
- DOI:
- 10.1086/158319
- Bibcode:
- 1980ApJ...241...74M
- Keywords:
-
- Astronomical Photometry;
- Bl Lacertae Objects;
- Continuous Spectra;
- Galactic Radiation;
- Spaceborne Astronomy;
- Ubv Spectra;
- Elliptical Galaxies;
- Light Curve;
- Satellite Observation;
- X Ray Astronomy;
- Astrophysics;
- BL Lacertae Objects:Elliptical Galaxies;
- Elliptical Galaxies:Photometry;
- Elliptical Galaxies:X-Ray Sources