Spectral study of BL Lac objects from Ginga.
Abstract
GINGA observed 5 BL Lac objects (3C 371, PKS 2155-304, H 0323+022, Mrk 421 and OJ 287) during 1987. Intensities of 3C 371 and OJ 287 were close to or less than the 3 confusion limit (0.2 mCrab in 2 - 10 keV) for the other three sources, good energy spectra were obtained in every 1000 to 2000 sec. They all showed significant intensity variations during the GINGA observations. The relation betwen the intensity and the spectral index was studied.
- Publication:
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Physics of Neutron Stars and Black Holes
- Pub Date:
- 1988
- Bibcode:
- 1988pnsb.conf..361O
- Keywords:
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- X-Ray Spectra: BL Lacertae Objects