Spectral energy distributions and high-energy emission of BL Lac type objects
Based on identifications from the Véron and Quasars.org catalogues, 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 s...
| Published in: | Monthly Notices of the Royal Astronomical Society: Letters |
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| Main Author: | |
| Format: | Text |
| Language: | English |
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Oxford University Press
2008
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| Online Access: | http://mnrasl.oxfordjournals.org/cgi/content/short/388/1/L79 https://doi.org/10.1111/j.1745-3933.2008.00503.x |
| Summary: | Based on identifications from the Véron and Quasars.org catalogues, 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 ultrahigh-energy cosmic rays from the previously studied Akeno Giant Air-Shower Array, Yakutsk and High-Resolution Fly's Eye samples is dominated by low-energy-peaked BLLs. |
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