Agile detection of a strong gamma-ray flare from the blazar 3C 454.3

被引：69

作者：

Vercellone, S. ^{[1
]}

Chen, A. W. ^{[1
,2
]}

Giuliani, A. ^{[1
]}

Bulgarelli, A. ^{[3
]}

Donnarumma, I. ^{[4
]}

Lapshov, I. ^{[4
]}

Tavani, M. ^{[4
,5
]}

Argan, A. ^{[4
]}

Barbiellini, G. ^{[6
]}

Caraveo, P. ^{[1
]}

Cocco, V. ^{[4
]}

Costa, E. ^{[4
]}

D'Ammando, F. ^{[4
,5
]}

Del Monte, E. ^{[4
]}

De Paris, G. ^{[4
]}

Di Cocco, G. ^{[3
]}

Evangelista, Y. ^{[4
]}

Feroci, M. ^{[4
]}

Fiorini, M. ^{[1
]}

Froysland, T. ^{[2
,5
]}

Fuschino, F. ^{[3
]}

Galli, M. ^{[7
]}

Gianotti, F. ^{[3
]}

Labanti, C. ^{[3
]}

Lazzarotto, F. ^{[4
]}

Lipari, P. ^{[8
]}

Longo, F. ^{[6
]}

Marisaldi, M. ^{[3
]}

Mauri, F. ^{[9
]}

Mereghetti, S. ^{[1
]}

Morselli, A. ^{[10
]}

Pacciani, L. ^{[4
]}

Pellizzoni, A. ^{[1
]}

Perotti, F. ^{[1
]}

Picozza, P. ^{[10
]}

Prest, M. ^{[11
]}

Pucella, G. ^{[4
]}

Rapisarda, M. ^{[12
]}

Soffitta, P. ^{[4
]}

Trifoglio, M. ^{[3
]}

Trois, A. ^{[4
]}

Vallazza, E. ^{[6
]}

Vittorini, V. ^{[5
]}

Zambra, A. ^{[1
]}

Zanello, D. ^{[8
]}

Pittori, C. ^{[13
]}

Verrecchia, F. ^{[13
]}

Gasparrini, D. ^{[13
]}

Cutini, S. ^{[13
]}

Giommi, P. ^{[13
]}

机构：

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

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

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

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

[5] Univ Roma Tor Vergata, Dipartimento Fis, I-00133 Rome, Italy

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

[7] ENEA Bologna, I-40059 Medicica, BO, Italy

[8] Ist Nazl Fis Nucl, I-00185 Rome, Italy

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

[10] Ist Nazl Fis Nucl, I-00133 Rome, Italy

[11] Univ Insubria, Dipartimento Fis, I-22100 Como, Italy

[12] ENEA, I-00044 Frascati, Rome, Italy

[13] ASI ASDC, I-00044 Frascati, Rome, Italy

[14] ASI, I-00198 Rome, Italy

来源：

ASTROPHYSICAL JOURNAL LETTERS | 2008年 / 676卷 / 01期

关键词：

gamma rays : observations; quasars : individual (3C 454.3);

D O I：

10.1086/587170

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report the first blazar detection by AGILE. AGILE detected 3C 454.3 during a period of strongly enhanced optical emission in 2007 July. AGILE observed the source with a dedicated repointing during the period 2007 July 24-30 with its two co-aligned imagers, the Gamma-Ray Imaging Detector and the hard X-ray imager Super-AGILE sensitive in the 30 MeV to 50 GeV and 18-60 keV ranges, respectively. Over the entire period, AGILE detected gamma-ray emission from 3C 454.3 at a significance level of 13.8 sigma with an average flux (E > 100 MeV) of (280 +/- 40) x 10(-8) photons cm(-2) s(-1). The gamma-ray flux appears to be variable toward the end of the observation. No emission was detected by Super-AGILE in the energy range 20-60 keV, with a 3 sigma upper limit of 2.3 x 10(-3) photons cm(-2) s(-1). The gamma-ray flux level of 3C 454.3 detected by AGILE is the highest ever detected for this quasar and among the most intense gamma-ray sluxes ever detected from flat-spectrum radio quasars.

引用

页码：L13 / L16

页数：4

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