Gamma-Ray Localization of Terrestrial Gamma-Ray Flashes

被引：41

作者：

Marisaldi, M. ^{[1
]}

Argan, A. ^{[2
]}

Trois, A. ^{[3
]}

Giuliani, A. ^{[4
]}

Tavani, M. ^{[3
,5
]}

Labanti, C. ^{[1
]}

Fuschino, F. ^{[1
]}

Bulgarelli, A. ^{[1
]}

Longo, F. ^{[6
]}

Barbiellini, G. ^{[6
,7
]}

Del Monte, E. ^{[3
]}

Moretti, E. ^{[6
]}

Trifoglio, M. ^{[1
]}

Costa, E. ^{[3
]}

Caraveo, P. ^{[4
]}

Cattaneo, P. W. ^{[8
]}

Chen, A. ^{[4
]}

D'Ammando, F. ^{[9
]}

De Paris, G. ^{[2
]}

Di Cocco, G. ^{[1
]}

Di Persio, G. ^{[3
]}

Donnarumma, I. ^{[3
]}

Evangelista, Y. ^{[3
]}

Feroci, M. ^{[3
]}

Ferrari, A. ^{[10
,11
]}

Fiorini, M. ^{[4
]}

Froysland, T. ^{[5
]}

Galli, M. ^{[12
]}

Gianotti, F. ^{[1
]}

Lapshov, I. ^{[13
]}

Lazzarotto, F. ^{[3
]}

Lipari, P. ^{[14
,15
]}

Mereghetti, S. ^{[4
]}

Morselli, A. ^{[16
]}

Pacciani, L. ^{[3
]}

Pellizzoni, A. ^{[17
]}

Perotti, F. ^{[4
]}

Picozza, P. ^{[5
,16
]}

Piano, G. ^{[3
,5
,16
]}

Pilia, M. ^{[17
,18
]}

Prest, M. ^{[18
]}

Pucella, G. ^{[19
]}

Rapisarda, M. ^{[19
]}

Rappoldi, A. ^{[8
]}

Rubini, A. ^{[3
]}

Sabatini, S. ^{[3
]}

Soffitta, P. ^{[3
]}

Striani, E. ^{[3
]}

Vallazza, E. ^{[7
]}

Vercellone, S. ^{[9
]}

机构：

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

[2] INAF, Rome, Italy

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

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

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

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

[7] INFN Trieste, I-34127 Trieste, Italy

[8] INFN Pavia, I-27100 Pavia, Italy

[9] INAF IASF Palermo, I-90146 Palermo, Italy

[10] Univ Turin, Dipartimento Fis, Turin, Italy

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

[12] ENEA, I-40129 Bologna, Italy

[13] IKI, Moscow, Russia

[14] Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy

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

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

[17] INAF Osservatorio Astronom Cagliari, I-09012 Capoterra, CA, Italy

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

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

[20] INAF, Osservatorio Astronom Brera, I-20121 Milan, Italy

[21] ASI Sci Data Ctr, I-00044 Rome, Italy

[22] Agenzia Spaziale Italiana, I-00198 Rome, Italy

来源：

PHYSICAL REVIEW LETTERS | 2010年 / 105卷 / 12期

关键词：

Gamma rays;

D O I：

10.1103/PhysRevLett.105.128501

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Terrestrial gamma-ray flashes (TGFs) are very short bursts of high-energy photons and electrons originating in Earth's atmosphere. We present here a localization study of TGFs carried out at gamma-ray energies above 20 MeV based on an innovative event selection method. We use the AGILE satellite Silicon Tracker data that for the first time have been correlated with TGFs detected by the AGILE Mini-Calorimeter. We detect 8 TGFs with gamma-ray photons of energies above 20 MeV localized by the AGILE gamma-ray imager with an accuracy of similar to 5-10 degrees at 50 MeV. Remarkably, all TGF-associated gamma rays are compatible with a terrestrial production site closer to the subsatellite point than 400 km. Considering that our gamma rays reach the AGILE satellite at 540 km altitude with limited scattering or attenuation, our measurements provide the first precise direct localization of TGFs from space.

引用

页数：5

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