Spectral energy distributions and high-energy emission of BL Lac type objects

Details Spectral energy distributions and high-energy emission of BL Lac type objects Spectral energy distributions and high-energy emission of BL Lac type objects

2008-02-04

arxiv.org/abs/0802.0399v2

Mon. Not. Roy. Astron. Soc. Lett., 388 (2008) L79

Astronomy and Astrophysics

Astrophysics

v.2: selection effects quantified, discussion of Auger results on BL Lac correlations extended. 5 pages, 4 figures, mn2e.cls s

Scientific paper

10.1111/j.1745-3933.2008.00503.x

Based on identifications from the Veron and Quasars.org catalogs, we determine the optical-to-X-ray spectral indices for a sample of 201 BL Lac type objects (BLLs) and search for trends in the distribution of these indices of the sources detected in high-energy bands. We find that EGRET-detected sources are low-energy peaked and that the positional correlation with the arrival directions of ultra-high-energy cosmic rays from the previously studied AGASA, Yakutsk and High Resolution Fly's Eye samples is dominated by low-energy-peaked BLLs.

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