Spectral energy distributions and high-energy emission of BL Lac type objects
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 sou...
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| Format: | Text |
| Language: | unknown |
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arXiv
2008
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| Online Access: | https://dx.doi.org/10.48550/arxiv.0802.0399 https://arxiv.org/abs/0802.0399 |
| Summary: | 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. : v.2: selection effects quantified, discussion of Auger results on BL Lac correlations extended. 5 pages, 4 figures, mn2e.cls style. The definitive version is available at http://www.blackwellsynergy.com |
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