(2010) Discovery of a GeV blazar shining through the galactic plane. Astrophysical Journal Letters, Vol.718 (No.2). L166-L170. doi:10.1088/2041-8205/718/2/L166 ISSN 2041-8205.

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Abstract

The Fermi Large Area Telescope (LAT) discovered a new gamma-ray source near the Galactic plane, Fermi J0109+6134, when it flared brightly in 2010 February. The low Galactic latitude (b = -1 degrees.2) indicated that the source could be located within the Galaxy, which motivated rapid multi-wavelength follow-up including radio, optical, and X-ray observations. We report the results of analyzing all 19 months of LAT data for the source, and of X-ray observations with both Swift and the Chandra X-ray Observatory. We determined the source redshift, z = 0.783, using a Keck Low-Resolution Imaging Spectrometer observation. Finally, we compiled a broadband spectral energy distribution (SED) from both historical and new observations contemporaneous with the 2010 February flare. The redshift, SED, optical line width, X-ray absorption, and multi-band variability indicate that this new GeV source is a blazar seen through the Galactic plane. Because several of the optical emission lines have equivalent width > 5 angstrom, this blazar belongs in the flat-spectrum radio quasar category.

Item Type:	Journal Article
Subjects:	Q Science > QB Astronomy
Divisions:	Faculty of Science, Engineering and Medicine > Science > Physics
Library of Congress Subject Headings (LCSH):	Gamma ray sources
Journal or Publication Title:	Astrophysical Journal Letters
Publisher:	IOP Publishing Ltd
ISSN:	2041-8205
Official Date:	1 August 2010
Dates:	Date Event 1 August 2010 Published
Volume:	Vol.718
Number:	No.2
Number of Pages:	5
Page Range:	L166-L170
DOI:	10.1088/2041-8205/718/2/L166
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access
Date of first compliant deposit:	3 December 2015
Date of first compliant Open Access:	3 December 2015
Funder:	Kavli Institute for Particle Astrophysics and Cosmology, Istituto nazionale di astrofisica (Italy) (INAF), Centre national d'études spatiales (France) (CNES), United States. National Aeronautics and Space Administration (NASA), United States. Dept. of Energy, France. Commissariat à l'énergie atomique (CEA), Institut national de physique nucléaire et de physique des particules, Agenzia spaziale italiana [Italian Space Agency] (ASI), Istituto nazionale di fisica nucleare (INFN), Japan. Monbushō, Kō-enerugī Kasokuki Kenkyū Kikō (Japan), Uchū Kōkū Kenkyū Kaihatsu Kikō, Knut och Alice Wallenbergs Stiftelse (Sweden), Sweden. Vetenskapsrådet [Research Council], Rymdstyrelsen [Swedish National Space Board] (SNSB), Centre national de la recherche scientifique (France) (CNRS), European Research Council (ERC)
Grant number:	ERC-StG-200911 (ERC)
Related URLs:	Other Repository

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