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VERITAS Observations of Six Bright, Hard-spectrum Fermi-LAT Blazars
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2012 (English)In: Astrophysical Journal, ISSN 0004-637X, E-ISSN 1538-4357, Vol. 759, no 2, article id 102Article in journal (Refereed) Published
Abstract [en]

We report on VERITAS very high energy (VHE; E ≥ 100 GeV) observations of six blazars selected from the Fermi Large Area Telescope First Source Catalog (1FGL). The gamma-ray emission from 1FGL sources was extrapolated up to the VHE band, taking gamma-ray absorption by the extragalactic background light into account. This allowed the selection of six bright, hard-spectrum blazars that were good candidate TeV emitters. Spectroscopic redshift measurements were attempted with the Keck Telescope for the targets without Sloan Digital Sky Survey spectroscopic data. No VHE emission is detected during the observations of the six sources described here. Corresponding TeV upper limits are presented, along with contemporaneousFermi observations and non-concurrent Swift UVOT and X-Ray Telescope data. The blazar broadband spectral energy distributions (SEDs) are assembled and modeled with a single-zone synchrotron self-Compton model. The SED built for each of the six blazars shows a synchrotron peak bordering between the intermediate- and high-spectrum-peak classifications, with four of the six resulting in particle-dominated emission regions.

Place, publisher, year, edition, pages
2012. Vol. 759, no 2, article id 102
Keywords [en]
BL Lacertae objects: general, gamma rays: galaxies
National Category
Astronomy, Astrophysics and Cosmology
Research subject
Physics, Astroparticle Physics
Identifiers
URN: urn:nbn:se:lnu:diva-42799DOI: 10.1088/0004-637X/759/2/102OAI: oai:DiVA.org:lnu-42799DiVA, id: diva2:807543
Available from: 2015-04-23 Created: 2015-04-23 Last updated: 2017-12-04Bibliographically approved

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Prokoph, Heike

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