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Title: FERMI OBSERVATIONS OF TeV-SELECTED ACTIVE GALACTIC NUCLEI

Journal Article · · Astrophysical Journal
 [1]; ; ; ; ; ;  [2];  [3];  [4]; ; ; ;  [5];  [6];  [7];  [8];  [9];  [10];  [11];  [12]
  1. Space Science Division, Naval Research Laboratory, Washington, DC 20375 (United States)
  2. W. W. Hansen Experimental Physics Laboratory, Kavli Institute for Particle Astrophysics and Cosmology, Department of Physics and SLAC National Accelerator Laboratory, Stanford University, Stanford, CA 94305 (United States)
  3. Santa Cruz Institute for Particle Physics, Department of Physics and Department of Astronomy and Astrophysics, University of California at Santa Cruz, Santa Cruz, CA 95064 (United States)
  4. Department of Astronomy, Stockholm University, SE-106 91 Stockholm (Sweden)
  5. Istituto Nazionale di Fisica Nucleare, Sezione di Pisa, I-56127 Pisa (Italy)
  6. Laboratoire AIM, CEA-IRFU/CNRS/Universite Paris Diderot, Service d'Astrophysique, CEA Saclay, 91191 Gif sur Yvette (France)
  7. Istituto Nazionale di Fisica Nucleare, Sezione di Trieste, I-34127 Trieste (Italy)
  8. Rice University, Department of Physics and Astronomy, MS-108, P.O. Box 1892, Houston, TX 77251 (United States)
  9. Istituto Nazionale di Fisica Nucleare, Sezione di Padova, I-35131 Padova (Italy)
  10. Istituto Nazionale di Fisica Nucleare, Sezione di Perugia, I-06123 Perugia (Italy)
  11. Dipartimento di Fisica 'M. Merlin' dell'Universita e del Politecnico di Bari, I-70126 Bari (Italy)
  12. Laboratoire Leprince-Ringuet, Ecole polytechnique, CNRS/IN2P3, Palaiseau (France)
+ Show Author Affiliations

We report on observations of TeV-selected active galactic nuclei (AGNs) made during the first 5.5 months of observations with the Large Area Telescope (LAT) on-board the Fermi Gamma-ray Space Telescope (Fermi). In total, 96 AGNs were selected for study, each being either (1) a source detected at TeV energies (28 sources) or (2) an object that has been studied with TeV instruments and for which an upper limit has been reported (68 objects). The Fermi observations show clear detections of 38 of these TeV-selected objects, of which 21 are joint GeV-TeV sources, and 29 were not in the third EGRET catalog. For each of the 38 Fermi-detected sources, spectra and light curves are presented. Most can be described with a power law of spectral index harder than 2.0, with a spectral break generally required to accommodate the TeV measurements. Based on an extrapolation of the Fermi spectrum, we identify sources, not previously detected at TeV energies, which are promising targets for TeV instruments. Evidence for systematic evolution of the gamma-ray spectrum with redshift is presented and discussed in the context of interaction with the extragalactic background light.

OSTI ID:
21392551
Journal Information:
Astrophysical Journal, Vol. 707, Issue 2; Other Information: DOI: 10.1088/0004-637X/707/2/1310; ISSN 0004-637X
Country of Publication:
United States
Language:
English

Cited By (36)

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Search of MeV–GeV counterparts of TeV sources with AGILE in pointing mode journal February 2016
Energy loss in intergalactic pair beams: Particle-in-cell simulation journal January 2016
The BL-Lacertae gamma-ray blazar PKS 1424+240 associated with a group of galaxies at z = 0.6010 journal April 2016
THE FIRST CATALOG OF ACTIVE GALACTIC NUCLEI DETECTED BY THE FERMI LARGE AREA TELESCOPE journal April 2010
THE SECOND CATALOG OF ACTIVE GALACTIC NUCLEI DETECTED BY THE FERMI LARGE AREA TELESCOPE journal December 2011
The Connection Between the Radio jet and the Gamma-Ray Emission in the Radio Galaxy 3c 120 journal July 2015
Constraints on the Intergalactic Magnetic Field with Gamma-Ray Observations of Blazars journal November 2015
FERMI LARGE AREA TELESCOPE FIRST SOURCE CATALOG journal May 2010
Unidentified sources in the Fermi-LAT second source catalog: the case for DM subhalos journal November 2012
Discovery of Variability in the very high Energy γ-Ray Emission of 1es 1218+304 with Veritas journal January 2010
A METHOD FOR SETTING UPPER LIMITS TO THE EXTRAGALACTIC BACKGROUND LIGHT WITH FERMI -LAT AND TeV OBSERVATIONS OF BLAZARS journal April 2010
The Discovery of γ-Ray Emission from the Blazar rgb J0710+591 journal April 2010
DEGREE-SCALE GeV “JETS” FROM ACTIVE AND DEAD TeV BLAZARS journal July 2010
TIME DELAY OF CASCADE RADIATION FOR TeV BLAZARS AND THE MEASUREMENT OF THE INTERGALACTIC MAGNETIC FIELD journal May 2011
Discovery of very high energy γ-ray emission from the blazar 1ES 0033+595 by the MAGIC telescopes journal November 2014
The long-term Swift observations of the high-energy peaked BL Lacertae source 1ES 1959+650 journal January 2016
Strong X-ray flaring activity of the BL Lacertae source OJ 287 in 2016 October–2017 April journal July 2018
Unravelling the unusually curved X-ray spectrum of RGB J0710 + 591 using AstroSat observations journal December 2019
No indications of axionlike particles from Fermi journal March 2011
Axion-like particles and recent observations of the cosmic infrared background radiation journal September 2017
High-energy γ-ray properties of the Fanaroff-Riley type I radio galaxy NGC 1275: High-energy γ-ray properties of the FR I radio galaxy NGC 1275 journal March 2011
Evidence for Strong Extragalactic Magnetic Fields from Fermi Observations of TeV Blazars journal April 2010
X-Ray Flaring Activity of mrk 421 in the First half of 2013 journal October 2016
DISCOVERY OF γ -RAY EMISSION FROM THE RADIO-INTERMEDIATE QUASAR III ZW 2: VIOLENT JET ACTIVITY WITH INTRADAY γ -RAY VARIABILITY journal October 2016
Discovery of high and very high-energy emission from the BL Lacertae object SHBL J001355.9–185406 text January 2013
Discovery of very high energy γ-ray emission from the blazar 1ES 0033+595 by the MAGIC telescopes text January 2015
The First Catalog of Active Galactic Nuclei Detected by the Fermi Large Area Telescope text January 2010
The Discovery of gamma-Ray Emission From The Blazar RGB J0710+591 text January 2010
No Indications of Axion-Like Particles From Fermi text January 2010
Dark matter subhaloes as gamma-ray sources and candidates in the first Fermi-LAT catalogue text January 2011
Unidentified sources in the Fermi-LAT second source catalog: the case for DM subhalos text January 2012
Discovery of high and very high-energy emission from the BL Lac object SHBL J001355.9-185406 text January 2013
The BL-Lac gamma-ray blazar PKS 1424+240 associated with a group of galaxies at z=0.6010 text January 2016

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Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
CATALOGS
EXTRAPOLATION
GALAXY NUCLEI
GAMMA RADIATION
GAMMA SPECTRA
GEV RANGE
RED SHIFT
TELESCOPES
TEV RANGE
VISIBLE RADIATION
DOCUMENT TYPES
ELECTROMAGNETIC RADIATION
ENERGY RANGE
IONIZING RADIATIONS
MATHEMATICAL SOLUTIONS
NUMERICAL SOLUTION
RADIATIONS
SPECTRA