VERITAS Observations of Six Bright, Hard-Spectrum Fermi-LAT Blazars

VERITAS Collaboration

doi:10.1088/0004-637X/759/2/102

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VERITAS Observations of Six Bright, Hard-Spectrum Fermi-LAT Blazars

Journal article

Open access

Peer reviewed

VERITAS Observations of Six Bright, Hard-Spectrum Fermi-LAT Blazars

VERITAS Collaboration

The Astrophysical journal, Vol.759(2), 102

10/26/2012

DOI: 10.1088/0004-637X/759/2/102

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Abstract

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 (SDSS) spectroscopic data. No VHE emission is detected during the observations of the six sources described here. Corresponding TeV upper limits are presented, along with contemporaneous Fermi observations and non-concurrent Swift UVOT and XRT 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 show a synchrotron peak bordering between the intermediate- and high-spectrum-peak classifications, with four of the six resulting in particle-dominated emission regions.

Astrophysics

Cosmology

Extragalactic Astrophysics

Galaxy Astrophysics

High Energy Astrophysical Phenomena

Instrumentation

Methods for Astrophysics

Solar

Stellar Astrophysics

Details

Title: Subtitle: VERITAS Observations of Six Bright, Hard-Spectrum Fermi-LAT Blazars
Creators: VERITAS Collaboration
Contributors: P Kaaret (Contributor) - University of Iowa, Physics and Astronomy
Resource Type: Journal article
Publication Details: The Astrophysical journal, Vol.759(2), 102
DOI: 10.1088/0004-637X/759/2/102
ISSN: 0004-637X
eISSN: 1538-4357
Publisher: Institute of Physics (IOP)
Grant note: unidentified / Natural Sciences and Engineering Research Council of Canada (nserc_______::NSERC) 10/RFP/AST2748 / Science Foundation Ireland (sfi_________::SFI) 0548180 / National Science Foundation (nsf_________::NSF)
Language: English
Date published: 10/26/2012
Academic Unit: Physics and Astronomy
Record Identifier: 9984199793802771

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