AGILE detection of intense gamma-ray emission from the blazar PKS 1510-089

被引：26

作者：

Pucella, G. ^{[1
]}

Vittorini, V. ^{[1
,2
]}

D'Ammando, F. ^{[1
,3
]}

Tavani, M. ^{[1
,3
]}

Raiteri, C. M. ^{[4
]}

Villata, M. ^{[4
]}

Argan, A. ^{[1
]}

Barbiellini, G. ^{[5
,6
]}

Boffelli, F. ^{[7
,8
]}

Bulgarelli, A. ^{[9
]}

Caraveo, P. ^{[10
]}

Cattaneo, P. W. ^{[7
]}

Chen, A. W. ^{[2
,10
]}

Cocco, V. ^{[1
]}

Costa, E. ^{[1
]}

DelMonte, E. ^{[1
]}

De Paris, G. ^{[1
]}

Di Cocco, G. ^{[9
]}

Donnarumma, I. ^{[1
]}

Evangelista, Y. ^{[1
]}

Feroci, M. ^{[1
]}

Fiorini, M. ^{[9
]}

Froysland, T. ^{[2
,3
]}

Fuschino, F. ^{[9
]}

Galli, M. ^{[11
]}

Gianotti, F. ^{[9
]}

Giuliani, A. ^{[10
]}

Labanti, C. ^{[9
]}

Lapshov, I. ^{[1
]}

Lazzarotto, F. ^{[1
]}

Lipari, P. ^{[12
]}

Longo, F. ^{[5
,6
]}

Marisaldi, M. ^{[9
]}

Mereghetti, S. ^{[10
]}

Morselli, A. ^{[13
]}

Pacciani, L. ^{[1
]}

Pellizzoni, A. ^{[10
]}

Perotti, F. ^{[10
]}

Picozza, P. ^{[13
]}

Prest, M. ^{[14
]}

Rapisarda, M. ^{[15
]}

Rappoldi, A. ^{[7
]}

Soffitta, P. ^{[1
]}

Trifoglio, M. ^{[9
]}

Trois, A. ^{[1
]}

Vallazza, E. ^{[5
,6
]}

Vercellone, S. ^{[10
]}

Zambra, A. ^{[1
]}

Zanello, D. ^{[12
]}

Antonelli, L. A. ^{[16
]}

机构：

[1] INAF IASF Roma, I-00133 Rome, Italy

[2] CIFS Torino, I-10133 Turin, Italy

[3] Univ Roma Tor Vergata, Dip Fis, I-00133 Rome, Italy

[4] OATo, INAF, I-10025 Pino Torinese, Torino, Italy

[5] Ist Nazl Fis Nucl, I-34127 Trieste, Italy

[6] Dip Fis, I-34127 Trieste, Italy

[7] Ist Nazl Fis Nucl, I-27100 Pavia, Italy

[8] Univ Pavia, Dipartimento Fis Nucl & Teor, I-27100 Pavia, Italy

[9] INAF IASF Bologna, I-40129 Bologna, Italy

[10] INAF IASF Milano, I-20133 Milan, Italy

[11] ENEA, I-40129 Bologna, Italy

[12] INFN Roma La Sapienza, I-00185 Rome, Italy

[13] INFN Roma Tor Vergata, I-00133 Rome, Italy

[14] Univ Insubria, Dip Fis, I-22100 Como, Italy

[15] ENEA, I-00044 Frascati, Roma, Italy

[16] ASI ASDC, I-00044 Frascati, Roma, Italy

[17] ASI, I-00198 Rome, Italy

[18] Univ Michigan, Dept Astron, Ann Arbor, MI 48109 USA

[19] Armenzano Astron Observ, I-06083 Perugia, Italy

[20] St Petersburg State Univ, Astron Inst, St Petersburg, Russia

[21] Circolo AStrofili Talmassons, I-33030 Udine, Italy

来源：

ASTRONOMY & ASTROPHYSICS | 2008年 / 491卷 / 02期

关键词：

gamma rays: observations; radiation mechanisms: non-thermal; quasars: individual: PKS 1510-089;

D O I：

10.1051/0004-6361:200810594

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Context. We report the detection by the AGILE (Astro-rivelatore Gamma a Immagini LEggero) satellite of an intense gamma-ray flare from the source AGL J1511-0909, associated with the powerful quasar PKS 1510-089, during ten days of observations from 23 August to 1 September 2007. Aims. During the observation period, the source was in optical decrease following a flaring event monitored by the GLAST- AGILE Support Program (GASP) of the Whole Earth Blazar Telescope (WEBT). The simultaneous gamma-ray, optical, and radio coverage allows us to study the spectral energy distribution and the theoretical models based on the synchrotron and inverse Compton (IC) emission mechanisms. Methods. AGILE observed the source with its two co-aligned imagers, the Gamma-Ray Imaging Detector and the hard X-ray imager Super-AGILE sensitive in the 30 MeV divided by 50 GeV and 18 divided by 60 keV bands, respectively. Results. Between 23 and 27 August 2007, AGILE detected gamma-ray emission from PKS 1510-089 when this source was located similar to 50 degrees off-axis, with an average flux of (270 +/- 65) x 10(-8) photons cm(-2) s(-1) for photon energy above 100 MeV. In the following period, 28 August-1 September, after a satellite re-pointing, AGILE detected the source at similar to 35 degrees off-axis, with an average flux (E > 100 MeV) of (195 +/- 30) x 10(-8) photons cm(-2) s(-1). No emission was detected by Super-AGILE, with a 3-sigma upper limit of 45 mCrab in 200 ks. Conclusions. The spectral energy distribution is modelled with a homogeneous one-zone synchrotron self Compton (SSC) emission plus contributions by external photons: the SSC emission contributes primarily to the X-ray band, whereas the contribution of the IC from the external disc and the broad line region match the hard gamma-ray spectrum observed.

引用

页码：L21 / L24

页数：4

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