Astronomy and Astrophysics – Astrophysics
Scientific paper
2007-06-29
Proc. 30th Int. Cosm. Ray Conf., R. Caballero et al. (eds.), UNAM, Mexico City, 2008, Vol. 3, pg. 881-884
Astronomy and Astrophysics
Astrophysics
4 pages, 4 figures, to appear in the proceedings of the 30th International Cosmic Ray Conference, Merida, July 2007
Scientific paper
Since 2002, the number of detected blazars at E_\gamma > 100 GeV has more than doubled. I study all currently known BL Lac-type objects with published energy spectra. Their intrinsic energy spectra are reconstructed by removing extragalactic background light attenuation effects. The emission properties are then compared and correlated among each other, with X-ray data, and with the individual black hole masses. In addition, I consider temporal properties of the very high energy gamma-ray flux. Key findings concern the flux--black hole mass and variability scale--black hole mass connections and the correlation of the spectral slope and the luminosity. As a specific application, the study allows to constrain the still undetermined redshift of the blazar PG 1553+113.
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