Advanced

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.; Agudo, I.; Ajello, M.; Allafort, A.; Aller, H. D.; Aller, M. F.; Antolini, E.; Arkharov, A. A. and Axelsson, Magnus LU , et al. (2010) In Astrophysical Journal 721(2). p.1425-1447
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 similar or equal to 2 x 1048 erg s-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. -ray flux has a complex correlation with the other wavelengths. There is no correlation at all with the X-ray... (More)
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 similar or equal to 2 x 1048 erg s-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. -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. -ray flux seems to lead the optical one by about 13 days. From the UV photometry, we estimated a black hole mass of similar or equal to 5.4 x 10(8)M(circle dot) and an accretion rate of similar or equal to 0.5M(circle dot) yr(-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. (Less)
Please use this url to cite or link to this publication:
author
, et al. (More)
(Less)
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
quasars:, individual (PKS 1510-089), galaxies: jets, gamma rays: galaxies, galaxies: active
in
Astrophysical Journal
volume
721
issue
2
pages
1425 - 1447
publisher
University of Chicago Press
external identifiers
  • wos:000282193600041
  • scopus:78149342054
ISSN
0004-637X
DOI
10.1088/0004-637X/721/2/1425
language
English
LU publication?
yes
id
b7237b46-e8cc-4089-b917-58097f6e3236 (old id 1695473)
date added to LUP
2010-10-25 15:55:37
date last changed
2018-06-03 04:00:59
@article{b7237b46-e8cc-4089-b917-58097f6e3236,
  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 similar or equal to 2 x 1048 erg s-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. -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. -ray flux seems to lead the optical one by about 13 days. From the UV photometry, we estimated a black hole mass of similar or equal to 5.4 x 10(8)M(circle dot) and an accretion rate of similar or equal to 0.5M(circle dot) yr(-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.},
  author       = {Abdo, A. A. and Ackermann, M. and Agudo, I. and Ajello, M. and Allafort, A. and Aller, H. D. and Aller, M. F. and Antolini, E. and Arkharov, A. A. and Axelsson, Magnus and Bach, U. and Baldini, L. and Ballet, J. and Barbiellini, G. and Bastieri, D. and Bechtol, K. and Bellazzini, R. and Berdyugin, A. and Berenji, B. and Blandford, R. D. and Blinov, D. A. and Bloom, E. D. and Boettcher, M. and Bonamente, E. and Borgland, A. W. and Bouvier, A. and Bregeon, J. and Brez, A. and Brigida, M. and Bruel, P. and Buehler, R. and Buemi, C. S. and Burnett, T. H. and Buson, S. and Caliandro, G. A. and Cameron, R. A. and Caraveo, P. A. and Carosati, D. and Carrigan, S. and Casandjian, J. M. and Cavazzuti, E. and Cecchi, C. and Celik, Oe and Chekhtman, A. and Chen, W. P. and Cheung, C. C. and Chiang, J. and Ciprini, S. and Claus, R. and Cohen-Tanugi, J. and Conrad, J. and Corbel, S. and Costamante, L. and Dermer, C. D. and de Angelis, A. and de Palma, F. and Donato, D. and do Couto e Silva, E. and Drell, P. S. and Dubois, R. and Dumora, D. and Farnier, C. and Favuzzi, C. and Fegan, S. J. and Ferrara, E. C. and Focke, W. B. and Forne, E. and Fortin, P. and Fukazawa, Y. and Funk, S. and Fusco, P. and Gargano, F. and Gasparrini, D. and Gehrels, N. and Germani, S. and Giebels, B. and Giglietto, N. and Giordano, F. and Giroletti, M. and Glanzman, T. and Godfrey, G. and Grenier, I. A. and Grove, J. E. and Guiriec, S. and Gurwell, M. A. and Gusbar, C. and Gomez, J. L. and Hadasch, D. and Hagen-Thorn, V. A. and Hayashida, M. and Hays, E. and Horan, D. and Hughes, R. E. and Johannesson, G. and Johnson, A. S. and Johnson, W. N. and Kamae, T. and Katagiri, H. and Kataoka, J. and Kawai, N. and Kimeridze, G. and Knoedlseder, J. and Konstantinova, T. S. and Kopatskaya, E. N. and Koptelova, E. and Kovalev, Y. Y. and Kurtanidze, O. M. and Kuss, M. and Lahteenmaki, A. and Lande, J. and Larionov, V. M. and Larionova, E. G. and Larionova, L. V. and Larsson, S. and Latronico, L. and Lee, S. -H. and Leto, P. and Lister, M. L. and Longo, F. and Loparco, F. and Lott, B. and Lovellette, M. N. and Lubrano, P. and Madejski, G. M. and Makeev, A. and Massaro, E. and Mazziotta, M. N. and McConville, W. and McEnery, J. E. and McHardy, I. M. and Michelson, P. F. and Mitthumsiri, W. and Mizuno, T. and Moiseev, A. A. and Monte, C. and Monzani, M. E. and Morozova, D. A. and Morselli, A. and Moskalenko, I. V. and Murgia, S. and Naumann-Godo, M. and Nikolashvili, M. G. and Nolan, P. L. and Norris, J. P. and Nuss, E. and Ohno, M. and Ohsugi, T. and Okumura, A. and Omodei, N. and Orlando, E. and Ormes, J. F. and Ozaki, M. and Paneque, D. and Panetta, J. H. and Parent, D. and Pasanen, M. and Pelassa, V. and Pepe, M. and Pesce-Rollins, M. and Piron, F. and Porter, T. A. and Pushkarev, A. B. and Raino, S. and Raiteri, C. M. and Rando, R. and Razzano, M. and Reimer, A. and Reimer, O. and Reinthal, R. and Ripken, J. and Ritz, S. and Roca-Sogorb, M. and Rodriguez, A. Y. and Roth, M. and Roustazadeh, P. and Ryde, F. and Sadrozinski, H. F. -W. and Sander, A. and Scargle, J. D. and Sgro, C. and Sigua, L. A. and Smith, P. D. and Sokolovsky, K. and Spandre, G. and Spinelli, P. and Starck, J. -L. and Strickman, M. S. and Suson, D. J. and Takahashi, H. and Takahashi, T. and Takalo, L. O. and Tanaka, T. and Taylor, B. and Thayer, J. B. and Thayer, J. G. and Thompson, D. J. and Tibaldo, L. and Tornikoski, M. and Torres, D. F. and Tosti, G. and Tramacere, A. and Trigilio, C. and Troitsky, I. S. and Umana, G. and Usher, T. L. and Vandenbroucke, J. and Vasileiou, V. and Vilchez, N. and Villata, M. and Vitale, V. and Waite, A. P. and Wang, P. and Winer, B. L. and Wood, K. S. and Yang, Z. and Ylinen, T. and Ziegler, M.},
  issn         = {0004-637X},
  keyword      = {quasars:,individual (PKS 1510-089),galaxies: jets,gamma rays: galaxies,galaxies: active},
  language     = {eng},
  number       = {2},
  pages        = {1425--1447},
  publisher    = {University of Chicago Press},
  series       = {Astrophysical Journal},
  title        = {Fermi Large Area Telescope and Multi-Wavelength Observations of the Flaring Activity of Pks 1510-089 between 2008 September and 2009 June},
  url          = {http://dx.doi.org/10.1088/0004-637X/721/2/1425},
  volume       = {721},
  year         = {2010},
}