2008/02/29 by S. Troitsky, Sergey Troitsky
Physics and Astronomy · #Air shower #Astronomy #Astrophysics #Astrophysics and Cosmic Phenomena #BL Lac object #Blazar #Cosmic ray #Dark Matter and Cosmic Phenomena #Egret #Energy (signal processing) #Galaxy #Gamma ray #Physics #Quasar #Radio Astronomy Observations and Technology #Spectral energy distribution #astro-ph
paper · pdf · doi:10.1111/j.1745-3933.2008.00503.x
published as Mon. Not. Roy. Astron. Soc. Lett., 388 (2008) L79 · 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
openalex publication_date 2008/06/17 · arxiv created 2008/07/11 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Abstract 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.