FERMI LARGE AREA TELESCOPE AND MULTI-WAVELENGTH OBSERVATIONS OF THE FLARING ACTIVITY OF PKS 1510-089 BETWEEN 2008 SEPTEMBER AND 2009 JUNE

Abdo, A A; Ackermann, M; Ajello, M; Allafort, A; Bechtol, K; Berenji, B; Blandford, R D; Agudo, I; Aller, H D; Aller, M F; Antolini, E; Arkharov, A A; Axelsson, M; Bach, U; Baldini, L; Bellazzini, R; Ballet, J; Barbiellini, G; Bastieri, D; Berdyugin, A

doi:10.1088/0004-637X/721/2/1425

Title: FERMI LARGE AREA TELESCOPE AND MULTI-WAVELENGTH OBSERVATIONS OF THE FLARING ACTIVITY OF PKS 1510-089 BETWEEN 2008 SEPTEMBER AND 2009 JUNE

Journal Article · Fri Oct 01 00:00:00 EDT 2010 · Astrophysical Journal

DOI:https://doi.org/10.1088/0004-637X/721/2/1425· OSTI ID:21464759

Abdo, A A ^[1]; Ackermann, M; Ajello, M; Allafort, A; Bechtol, K; Berenji, B; Blandford, R D ^[2]; Agudo, I ^[3]; Aller, H D; Aller, M F ^[4]; Antolini, E ^[5]; Arkharov, A A ^[6]; Axelsson, M ^[7]; Bach, U ^[8]; Baldini, L; Bellazzini, R ^[9]; Ballet, J ^[10]; Barbiellini, G ^[11]; Bastieri, D ^[12]; Berdyugin, A ^[13]

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)
Instituto de Astrofisica de Andalucia, CSIC, Apdo. 3004, Granada 18080 (Spain)
Department of Astronomy, University of Michigan, Ann Arbor, MI 48109-1042 (United States)
Istituto Nazionale di Fisica Nucleare, Sezione di Perugia, I-06123 Perugia (Italy)
Pulkovo Observatory, 196140 St. Petersburg (Russian Federation)
Department of Astronomy, Stockholm University, SE-106 91 Stockholm (Sweden)
Max-Planck-Institut fuer Radioastronomie, Auf dem Huegel 69, 53121 Bonn (Germany)
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)
Tuorla Observatory, University of Turku, FI-21500 Piikkioe (Finland)

We report on the multi-wavelength observations of PKS 1510-089 (a flat spectrum radio quasar (FSRQ) at z = 0.361) during its high activity period between 2008 September and 2009 June. During this 11 month period, the source was characterized by a complex variability at optical, UV, and {gamma}-ray bands, on timescales down to 6-12 hr. The brightest {gamma}-ray isotropic luminosity, recorded on 2009 March 26, was {approx_equal}2 x 10{sup 48} erg s{sup -1}. The spectrum in the Fermi Large Area Telescope energy range shows a mild curvature described well by a log-parabolic law, and can be understood as due to the Klein-Nishina effect. The {gamma}-ray flux has a complex correlation with the other wavelengths. There is no correlation at all with the X-ray band, a weak correlation with the UV, and a significant correlation with the optical flux. The {gamma}-ray flux seems to lead the optical one by about 13 days. From the UV photometry, we estimated a black hole mass of {approx_equal}5.4 x 10{sup 8} M{sub sun} and an accretion rate of {approx_equal}0.5 M{sub sun} yr{sup -1}. Although the power in the thermal and non-thermal outputs is smaller compared to the very luminous and distant FSRQs, PKS 1510-089 exhibits a quite large Compton dominance and a prominent big blue bump (BBB) as observed in the most powerful {gamma}-ray quasars. The BBB was still prominent during the historical maximum optical state in 2009 May, but the optical/UV spectral index was softer than in the quiescent state. This seems to indicate that the BBB was not completely dominated by the synchrotron emission during the highest optical state. We model the broadband spectrum assuming a leptonic scenario in which the inverse Compton emission is dominated by the scattering of soft photons produced externally to the jet. The resulting model-dependent jet energetic content is compatible with a scenario in which the jet is powered by the accretion disk, with a total efficiency within the Kerr black hole limit.

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OSTI ID:: 21464759

Journal Information:: Astrophysical Journal, Vol. 721, Issue 2; Other Information: DOI: 10.1088/0004-637X/721/2/1425; ISSN 0004-637X

Country of Publication:: United States

Language:: English

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Ejection of Double knots from the radio core of PKS 1510--089 during the strong gamma-ray flares in 2015 Park, Jongho; Lee, Sang-Sung; Kim, Jae-Young arXiv https://doi.org/10.48550/arxiv.1904.11118	text	January 2019

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Title: FERMI LARGE AREA TELESCOPE AND MULTI-WAVELENGTH OBSERVATIONS OF THE FLARING ACTIVITY OF PKS 1510-089 BETWEEN 2008 SEPTEMBER AND 2009 JUNE

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