FERMI LARGE AREA TELESCOPE OBSERVATIONS OF MISALIGNED ACTIVE GALACTIC NUCLEI

Abdo, A A; Ackermann, M; Ajello, M; Bechtol, K; Berenji, B; Blandford, R D; Bloom, E D; Borgland, A W; Bouvier, A; Baldini, L; Bellazzini, R; Bregeon, J; Brez, A; Ballet, J; Barbiellini, G; Bastieri, D; Bonamente, E; Brandt, T J; Brigida, M; Bruel, P

doi:10.1088/0004-637X/720/1/912

FERMI LARGE AREA TELESCOPE OBSERVATIONS OF MISALIGNED ACTIVE GALACTIC NUCLEI

Journal Article · Wed Sep 01 04:00:00 EDT 2010 · Astrophysical Journal

DOI:https://doi.org/10.1088/0004-637X/720/1/912· OSTI ID:21460093

Abdo, A A ^[1]; Ackermann, M; Ajello, M; Bechtol, K; Berenji, B; Blandford, R D; Bloom, E D; Borgland, A W; Bouvier, A ^[2]; Baldini, L; Bellazzini, R; Bregeon, J; Brez, A ^[3]; Ballet, J ^[4]; Barbiellini, G ^[5]; Bastieri, D ^[6]; Bonamente, E ^[7]; Brandt, T J ^[8]; Brigida, M ^[9]; Bruel, P ^[10]

Space Science Division, Naval Research Laboratory, Washington, DC 20375 (United States)
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)
Istituto Nazionale di Fisica Nucleare, Sezione di Pisa, I-56127 Pisa (Italy)
Laboratoire AIM, CEA-IRFU/CNRS/Universite Paris Diderot, Service d'Astrophysique, CEA Saclay, 91191 Gif sur Yvette (France)
Istituto Nazionale di Fisica Nucleare, Sezione di Trieste, I-34127 Trieste (Italy)
Istituto Nazionale di Fisica Nucleare, Sezione di Padova, I-35131 Padova (Italy)
Istituto Nazionale di Fisica Nucleare, Sezione di Perugia, I-06123 Perugia (Italy)
Centre d'Etude Spatiale des Rayonnements, CNRS/UPS, BP 44346, F-30128 Toulouse Cedex 4 (France)
Dipartimento di Fisica 'M. Merlin' dell'Universita e del Politecnico di Bari, I-70126 Bari (Italy)
Laboratoire Leprince-Ringuet, Ecole polytechnique, CNRS/IN2P3, Palaiseau (France)

Analysis is presented for 15 months of data taken with the Large Area Telescope (LAT) on the Fermi Gamma-ray Space Telescope for 11 non-blazar active galactic nuclei (AGNs), including seven FRI radio galaxies and four FRII radio sources consisting of two FRII radio galaxies and two steep spectrum radio quasars. The broad line FRI radio galaxy 3C 120 is reported here as a {gamma}-ray source for the first time. The analysis is based on directional associations of LAT sources with radio sources in the 3CR, 3CRR, and MS4 (collectively referred to as 3C-MS) catalogs. Seven of the eleven LAT sources associated with 3C-MS radio sources have spectral indices larger than 2.3 and, except for the FRI radio galaxy NGC 1275 that shows possible spectral curvature, are well described by a power law. No evidence for time variability is found for any sources other than NGC 1275. The {gamma}-ray luminosities of FRI radio galaxies are significantly smaller than those of the BL Lac objects detected by the LAT, whereas the {gamma}-ray luminosities of the FRII sources are quite similar to those of FSRQs, which could reflect different beaming factors for the {gamma}-ray emission. A core dominance (CD) study of the 3CRR sample indicates that sources closer to the jet axis are preferentially detected with the Fermi LAT, insofar as the {gamma}-ray-detected misaligned AGNs have larger CD at a given average radio flux. The results are discussed in view of the AGN unification scenario.

OSTI ID:: 21460093

Journal Information:: Astrophysical Journal, Journal Name: Astrophysical Journal Journal Issue: 1 Vol. 720; ISSN ASJOAB; ISSN 0004-637X

Country of Publication:: United States

Language:: English

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The Gamma-Ray Source agl J2241+4454 as the Possible Counterpart of mwc 656 Munar-Adrover, Pere; Sabatini, S.; Piano, Giovanni The Astrophysical Journal, Vol. 829, Issue 2 https://doi.org/10.3847/0004-637x/829/2/101	journal	September 2016
The Connection Between the Radio jet and the Gamma-Ray Emission in the Radio Galaxy 3c 120 Casadio, Carolina; Gómez, José L.; Grandi, Paola The Astrophysical Journal, Vol. 808, Issue 2 https://doi.org/10.1088/0004-637x/808/2/162	journal	July 2015
Fast γ-ray Variability: A Common Feature and Powerful Probe for Jetted AGNs Liao, Neng-hui Galaxies, Vol. 6, Issue 3 https://doi.org/10.3390/galaxies6030068	journal	July 2018
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 Brown, Anthony M.; Adams, Jenni Monthly Notices of the Royal Astronomical Society, Vol. 413, Issue 4 https://doi.org/10.1111/j.1365-2966.2011.18351.x	journal	March 2011
HUNTING FOR TREASURES AMONG THE FERMI UNASSOCIATED SOURCES: A MULTIWAVELENGTH APPROACH Acero, F.; Donato, D.; Ojha, R. The Astrophysical Journal, Vol. 779, Issue 2 https://doi.org/10.1088/0004-637x/779/2/133	journal	December 2013
X-Ray and GeV Gamma-Ray Variability of the Radio Galaxy NGC 1275 Fukazawa, Yasushi; Shiki, Kensei; Tanaka, Yasuyuki The Astrophysical Journal, Vol. 855, Issue 2 https://doi.org/10.3847/1538-4357/aaabc0	journal	March 2018
FIRST DETECTION IN GAMMA-RAYS OF A YOUNG RADIO GALAXY: FERMI -LAT OBSERVATIONS OF THE COMPACT SYMMETRIC OBJECT PKS 1718−649 Migliori, G.; Siemiginowska, A.; Sobolewska, M. The Astrophysical Journal, Vol. 821, Issue 2 https://doi.org/10.3847/2041-8205/821/2/l31	journal	April 2016
TANAMI: Tracking Active Galactic Nuclei with Austral Milliarcsecond Interferometry: II. Additional sources Müller, C.; Kadler, M.; Ojha, R. Astronomy & Astrophysics, Vol. 610 https://doi.org/10.1051/0004-6361/201731455	journal	February 2018
The High Energy View of FR0 Radio Galaxies Baldi, Ranieri Diego; Torresi, Eleonora; Migliori, Giulia Galaxies, Vol. 7, Issue 3 https://doi.org/10.3390/galaxies7030076	journal	September 2019
The radio/gamma-ray connection in Active Galactic Nuclei in the era of the Fermi Large Area Telescope Ackermann, M.; Ajello, M.; Allafort, A. arXiv https://doi.org/10.48550/arxiv.1108.0501	text	January 2011
The high-energy gamma-ray detection of G73.9+0.9, a supernova remnant interacting with a molecular cloud Zdziarski, A. A.; Malyshev, D.; De Ona Wilhelmi, E. Deutsches Elektronen-Synchrotron, DESY, Hamburg https://doi.org/10.3204/pubdb-2016-01252	text	January 2016
WHY HAVE MANY OF THE BRIGHTEST RADIO-LOUD BLAZARS NOT BEEN DETECTED IN GAMMA-RAYS BY FERMI ? Lister, M. L.; Aller, M. F.; Aller, H. D. The Astrophysical Journal, Vol. 810, Issue 1 https://doi.org/10.1088/2041-8205/810/1/l9	journal	August 2015
From the Blazar Sequence to the Blazar Envelope: Revisiting the Relativistic jet Dichotomy in Radio-Loud Active Galactic Nuclei Meyer, Eileen T.; Fossati, Giovanni; Georganopoulos, Markos IOP https://doi.org/10.13016/m2mqfb-qm3t	collection	January 2011
Revealing the Broad Line Region of NGC 1275: The Relationship to Jet Power Punsly, Brian; Marziani, Paola; Bennert, Vardha N. The Astrophysical Journal, Vol. 869, Issue 2 https://doi.org/10.3847/1538-4357/aaec75	journal	December 2018
The γ-Ray Emission Region in the Fanaroff-Riley ii Radio Galaxy 3c 111 Grandi, P.; Torresi, E.; Stanghellini, C. The Astrophysical Journal, Vol. 751, Issue 1 https://doi.org/10.1088/2041-8205/751/1/l3	journal	April 2012
The High Energy View of FR0 Radio Galaxies Baldi, Ranieri D.; Torresi, Eleonora; Migliori, Giulia arXiv https://doi.org/10.48550/arxiv.1909.04113	preprint	January 2019
The high-energy gamma-ray detection of G73.9+0.9, a supernova remnant interacting with a molecular cloud Zdziarski, Andrzej A.; Malyshev, Denys; de Oña Wilhelmi, Emma Monthly Notices of the Royal Astronomical Society, Vol. 455, Issue 2 https://doi.org/10.1093/mnras/stv2167	journal	November 2015
Six Years of Fermi-Lat and Multi-Wavelength Monitoring of the Broad-Line Radio Galaxy 3c 120: jet Dissipation at Sub-Parsec Scales from the Central Engine Tanaka, Y. T.; Doi, A.; Inoue, Y. The Astrophysical Journal, Vol. 799, Issue 2 https://doi.org/10.1088/2041-8205/799/2/l18	journal	January 2015
Diffuse γ-Ray Emission from Misaligned Active Galactic Nuclei Di Mauro, M.; Calore, F.; Donato, F. The Astrophysical Journal, Vol. 780, Issue 2 https://doi.org/10.1088/0004-637x/780/2/161	journal	December 2013
The Circinus Galaxy Revisited with 10 yr Fermi -LAT Data Guo, Xiao-Lei; Xin, Yu-Liang; Liao, Neng-Hui The Astrophysical Journal, Vol. 885, Issue 2 https://doi.org/10.3847/1538-4357/ab44ba	journal	November 2019
DISCOVERY OF γ -RAY EMISSION FROM THE RADIO-INTERMEDIATE QUASAR III ZW 2: VIOLENT JET ACTIVITY WITH INTRADAY γ -RAY VARIABILITY Liao, Neng-Hui; Xin, Yu-Liang; Fan, Xu-Liang The Astrophysical Journal Supplement Series, Vol. 226, Issue 2 https://doi.org/10.3847/0067-0049/226/2/17	journal	October 2016
Suzaku Observations of gamma-Ray Bright Radio Galaxies: Origin of the X-ray Emission and Broad-Band Modelin Fukazawa, Yasushi; Finke, Justin; Stawarz, Lukasz arXiv https://doi.org/10.48550/arxiv.1410.2733	text	January 2014
Gamma-ray emission in radio galaxies under the VLBI scope: I. Parsec-scale jet kinematics and high-energy properties of Angioni, R.; Ros, E.; Kadler, M. Astronomy & Astrophysics, Vol. 627 https://doi.org/10.1051/0004-6361/201935697	journal	July 2019
Compton Dominance and the Blazar Sequence Finke, Justin D. The Astrophysical Journal, Vol. 763, Issue 2 https://doi.org/10.1088/0004-637x/763/2/134	journal	January 2013
The Origins of the Gamma-Ray Flux Variations of NGC 1275 Based on Eight Years of Fermi -LAT Observations Tanada, K.; Kataoka, J.; Arimoto, M. The Astrophysical Journal, Vol. 860, Issue 1 https://doi.org/10.3847/1538-4357/aac26b	journal	June 2018
Spectroscopy of Broad-Line Blazars from 1lac Shaw, Michael S.; Romani, Roger W.; Cotter, Garret The Astrophysical Journal, Vol. 748, Issue 1 https://doi.org/10.1088/0004-637x/748/1/49	journal	March 2012
Rapid Gamma-Ray Variability of NGC 1275 Baghmanyan, V.; Gasparyan, S.; Sahakyan, N. The Astrophysical Journal, Vol. 848, Issue 2 https://doi.org/10.3847/1538-4357/aa8c7b	journal	October 2017
Gamma-ray observations of low-luminosity active galactic nuclei de Menezes, Raniere; Nemmen, Rodrigo; Finke, Justin D. arXiv https://doi.org/10.48550/arxiv.2001.03184	text	January 2020
THE RADIO/GAMMA-RAY CONNECTION IN ACTIVE GALACTIC NUCLEI IN THE ERA OF THE FERMI LARGE AREA TELESCOPE Ackermann, M.; Ajello, M.; Allafort, A. The Astrophysical Journal, Vol. 741, Issue 1 https://doi.org/10.1088/0004-637x/741/1/30	journal	October 2011
Gamma-ray observations of low-luminosity active galactic nuclei de Menezes, Raniere; Nemmen, Rodrigo; Finke, Justin D. Monthly Notices of the Royal Astronomical Society, Vol. 492, Issue 3 https://doi.org/10.1093/mnras/staa083	journal	January 2020
From the Blazar Sequence to the Blazar Envelope: Revisiting the Relativistic jet Dichotomy in Radio-Loud Active Galactic Nuclei Meyer, Eileen T.; Fossati, Giovanni; Georganopoulos, Markos The Astrophysical Journal, Vol. 740, Issue 2 https://doi.org/10.1088/0004-637x/740/2/98	journal	October 2011
VLBI and single-dish monitoring of 3C 84 for the period 2009-2011: Radio monitoring of 3C 84 Nagai, H.; Orienti, M.; Kino, M. Monthly Notices of the Royal Astronomical Society: Letters, Vol. 423, Issue 1 https://doi.org/10.1111/j.1745-3933.2012.01269.x	journal	May 2012
Discovery of a Fanaroff–Riley type 0 radio galaxy emitting at γ-ray energies Grandi, Paola; Capetti, Alessandro; Baldi, Ranieri D. Monthly Notices of the Royal Astronomical Society, Vol. 457, Issue 1 https://doi.org/10.1093/mnras/stv2846	journal	January 2016
BLAZARS AS ULTRA-HIGH-ENERGY COSMIC-RAY SOURCES: IMPLICATIONS FOR TeV GAMMA-RAY OBSERVATIONS Murase, Kohta; Dermer, Charles D.; Takami, Hajime The Astrophysical Journal, Vol. 749, Issue 1 https://doi.org/10.1088/0004-637x/749/1/63	journal	March 2012
Broad Line Radio Galaxies Observed with Fermi-LAT: The Origin of the GeV Gamma-Ray Emission Kataoka, J.; Stawarz, L.; Takahashi, Y. arXiv https://doi.org/10.48550/arxiv.1107.3370	text	January 2011
MULTIBAND DIAGNOSTICS OF UNIDENTIFIED 1FGL SOURCES WITH SUZAKU AND SWIFT X-RAY OBSERVATIONS Takeuchi, Y.; Kataoka, J.; Maeda, K. The Astrophysical Journal Supplement Series, Vol. 208, Issue 2 https://doi.org/10.1088/0067-0049/208/2/25	journal	September 2013
SUZAKU OBSERVATIONS OF γ-RAY BRIGHT RADIO GALAXIES: ORIGIN OF THE X-RAY EMISSION AND BROADBAND MODELING Fukazawa, Yasushi; Finke, Justin; Stawarz, Łukasz The Astrophysical Journal, Vol. 798, Issue 2 https://doi.org/10.1088/0004-637x/798/2/74	journal	December 2014

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COSMIC GAMMA SOURCES
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