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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

Abstract

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 exhibitsmore » 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.« less

Authors:
 [1]; ; ; ; ; ;  [2];  [3]; ;  [4];  [5];  [6];  [7];  [8]; ;  [9];  [10];  [11];  [12];  [13]
  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. Instituto de Astrofisica de Andalucia, CSIC, Apdo. 3004, Granada 18080 (Spain)
  4. Department of Astronomy, University of Michigan, Ann Arbor, MI 48109-1042 (United States)
  5. Istituto Nazionale di Fisica Nucleare, Sezione di Perugia, I-06123 Perugia (Italy)
  6. Pulkovo Observatory, 196140 St. Petersburg (Russian Federation)
  7. Department of Astronomy, Stockholm University, SE-106 91 Stockholm (Sweden)
  8. Max-Planck-Institut fuer Radioastronomie, Auf dem Huegel 69, 53121 Bonn (Germany)
  9. Istituto Nazionale di Fisica Nucleare, Sezione di Pisa, I-56127 Pisa (Italy)
  10. Laboratoire AIM, CEA-IRFU/CNRS/Universite Paris Diderot, Service d'Astrophysique, CEA Saclay, 91191 Gif sur Yvette (France)
  11. Istituto Nazionale di Fisica Nucleare, Sezione di Trieste, I-34127 Trieste (Italy)
  12. Istituto Nazionale di Fisica Nucleare, Sezione di Padova, I-35131 Padova (Italy)
  13. Tuorla Observatory, University of Turku, FI-21500 Piikkioe (Finland)
Publication Date:
OSTI Identifier:
21464759
Resource Type:
Journal Article
Journal Name:
Astrophysical Journal
Additional Journal Information:
Journal Volume: 721; Journal Issue: 2; Other Information: DOI: 10.1088/0004-637X/721/2/1425; Journal ID: ISSN 0004-637X
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ACCRETION DISKS; BLACK HOLES; FLARING; GALAXIES; GAMMA RADIATION; LUMINOSITY; PHOTOMETRY; PHOTONS; QUASARS; TELESCOPES; WAVELENGTHS; X RADIATION; BOSONS; COSMIC RADIO SOURCES; ELECTROMAGNETIC RADIATION; ELEMENTARY PARTICLES; IONIZING RADIATIONS; MASSLESS PARTICLES; OPTICAL PROPERTIES; PHYSICAL PROPERTIES; RADIATIONS

Citation Formats

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, and Berdyugin, A. FERMI LARGE AREA TELESCOPE AND MULTI-WAVELENGTH OBSERVATIONS OF THE FLARING ACTIVITY OF PKS 1510-089 BETWEEN 2008 SEPTEMBER AND 2009 JUNE. United States: N. p., 2010. Web. doi:10.1088/0004-637X/721/2/1425.
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. FERMI LARGE AREA TELESCOPE AND MULTI-WAVELENGTH OBSERVATIONS OF THE FLARING ACTIVITY OF PKS 1510-089 BETWEEN 2008 SEPTEMBER AND 2009 JUNE. United States. https://doi.org/10.1088/0004-637X/721/2/1425
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, and Berdyugin, A. Fri . "FERMI LARGE AREA TELESCOPE AND MULTI-WAVELENGTH OBSERVATIONS OF THE FLARING ACTIVITY OF PKS 1510-089 BETWEEN 2008 SEPTEMBER AND 2009 JUNE". United States. https://doi.org/10.1088/0004-637X/721/2/1425.
@article{osti_21464759,
title = {FERMI LARGE AREA TELESCOPE AND MULTI-WAVELENGTH OBSERVATIONS OF THE FLARING ACTIVITY OF PKS 1510-089 BETWEEN 2008 SEPTEMBER AND 2009 JUNE},
author = {Abdo, A A and Ackermann, M and Ajello, M and Allafort, A and Bechtol, K and Berenji, B and Blandford, R D and Agudo, I and Aller, H D and Aller, M F and Antolini, E and Arkharov, A A and Axelsson, M and Bach, U and Baldini, L and Bellazzini, R and Ballet, J and Barbiellini, G and Bastieri, D and Berdyugin, A},
abstractNote = {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.},
doi = {10.1088/0004-637X/721/2/1425},
url = {https://www.osti.gov/biblio/21464759}, journal = {Astrophysical Journal},
issn = {0004-637X},
number = 2,
volume = 721,
place = {United States},
year = {2010},
month = {10}
}

Works referencing / citing this record:

Long-term multiwavelength studies of high-redshift blazar 0836+710
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Polarization structure of 12 gamma-ray quasars at 5 and 15 GHz
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Long-term multiwavelength studies of high-redshift blazar 0836+710
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VERY RAPID HIGH-AMPLITUDE GAMMA-RAY VARIABILITY IN LUMINOUS BLAZAR PKS 1510–089 STUDIED WITH FERMI -LAT
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Radio and γ-ray follow-up of the exceptionally high-activity state of PKS 1510−089 in 2011
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Polarization structure of 12 gamma-ray quasars at 5 and 15 GHz
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H.E.S.S. discovery of VHE γ -rays from the quasar PKS 1510−089
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Multiwavelength observations of a VHE gamma-ray flare from PKS 1510−089 in 2015
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Oblique Shocks as the Origin of Radio to Gamma-Ray Variability in Active Galactic Nuclei
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Constraining the Location of Gamma-Ray Flares in Luminous Blazars
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Long-term Multiband Study of High-redshift Blazar S5 0836+71
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Exploring the nature of the 2016 γ-ray emission in the blazar 1749+096
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On the origin of gamma-rays in Fermi blazars: beyondthe broad-line region
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Kinematics of Parsec-scale Jets of Gamma-Ray Blazars at 43 GHz within the VLBA-BU-BLAZAR Program
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On the Multiwavelength Emission from CTA 102
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Multi-frequency Variability Study of Ton 599 during the High Activity of 2017
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Ejection of Double Knots from the Radio Core of PKS 1510–089 during the Strong Gamma-Ray Flares in 2015
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Two-zone Emission Modeling of PKS 1510-089 during the High State of 2015
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