BeppoSAX Spectral Survey of BL Lacs - new spectra and results

Details BeppoSAX Spectral Survey of BL Lacs - new spectra and results BeppoSAX Spectral Survey of BL Lacs - new spectra and results

2001-12-13

arxiv.org/abs/astro-ph/0112311v1

Astronomy and Astrophysics

Astrophysics

14 pages, 9 figures, accepted by A&A

Scientific paper

10.1051/0004-6361:20011752

We present BeppoSAX LECS, MECS, and PDS spectra of eleven X-ray selected BL Lacertae objects. Combining these sources with the ones presented elsewhere we have a sample of 21 BL Lacs from the Einstein Medium Sensitivity and Einstein Slew Survey. The sample shows strong correlations of several physical parameters with the peak frequency of the synchrotron branch of the spectral energy distribution. In particular the peak frequency is correlated to the X-ray spectral shape: objects with the peak near to the X-ray band show harder and straighter X-ray spectra than those of the low energy peaked sources. This work shows that the recently proposed unification scenario for different types of blazars can hold also within the class of high frequency peaked BL Lac objects.

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