J.H. Fan1,2 - G.Z. Xie 3 - R. Bacon 1
1 - CRAL Observatoire de Lyon, 9 avenue Charles André, 69563 Saint-Genis-laval Cedex, France
2 - Center for Astrophysics, Guangzhou Normal University, Guangzhou 510400, China e-mail:email@example.com
3 - Yunnan Observatory, Chinese Academy of Sciences, Kunming 650011, China
Received June 30; accepted October 7, 1998
In this paper, the central black hole masses and the Doppler factors are derived for PKS 0528+134, PKS 0537-441, 3C 279, PKS 1406-074, PKS 1622-297, Q1633+382, Mkn 501, and BL Lacertae. The masses obtained are in the range of (1 - 7) and compared with that obtained with the Klein-Nishina cross section considered (Dermer & Gehrels 1995). If we considered only the Thomson cross section, the masses are in the range of . The masses obtained from our method are less sensitive to the flux than those obtained from Dermer & Gehrels (1995) method. The masses obtained from two flares (1991 and 1996 flares) of 3C 279 are almost the same. For 3C 279 and BL Lacertae, viewing angle, , and Lorentz factor, , are estimated from the derived Doppler factor and the measured superluminal velocity. For 3C 279, , for = 3.37; , for = 4.89; for BL Lacertae, , .
Key words: black holes -- BL Lacertae objects -- galaxies: jets
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