AGILE OBSERVATIONS OF THE GRAVITATIONAL-WAVE EVENT GW150914

被引：37

作者：

Tavani, M. ^{[1
,2
,3
]}

Pittori, C. ^{[4
,5
]}

Verrecchia, F. ^{[4
,5
]}

Bulgarelli, A. ^{[6
]}

Giuliani, A. ^{[7
]}

Donnarumma, I. ^{[1
]}

Argan, A. ^{[1
]}

Trois, A. ^{[8
]}

Lucarelli, F. ^{[4
,5
]}

Marisaldi, M. ^{[6
]}

Del Monte, E. ^{[1
]}

Evangelista, Y. ^{[1
]}

Fioretti, V. ^{[6
]}

Zoli, A. ^{[6
]}

Piano, G. ^{[1
]}

Munar-Adrover, P. ^{[1
]}

Antonelli, L. A. ^{[4
,5
]}

Barbiellini, G. ^{[9
,10
]}

Caraveo, P. ^{[7
]}

Cattaneo, P. W. ^{[11
]}

Costa, E. ^{[1
]}

Feroci, M. ^{[1
]}

Ferrari, A. ^{[12
]}

Longo, F. ^{[9
,10
]}

Mereghetti, S. ^{[7
]}

Minervini, G. ^{[13
]}

Morselli, A. ^{[14
]}

Pacciani, L. ^{[1
]}

Pellizzoni, A. ^{[8
]}

Picozza, P. ^{[14
]}

Pilia, M. ^{[8
]}

Rappoldi, A. ^{[11
]}

Sabatini, S. ^{[1
]}

Vercellone, S. ^{[15
]}

Vittorini, V. ^{[1
]}

Giommi, P. ^{[4
]}

Colafrancesco, S. ^{[16
]}

Cardillo, M. ^{[17
]}

Galli, M. ^{[18
]}

Fuschino, F. ^{[19
]}

机构：

[1] INAF IAPS, Via Fosso Cavaliere 100, I-00133 Rome, Italy

[2] Univ Roma Tor Vergata, Dip Fis, Via Ric Sci 1, I-00133 Rome, Italy

[3] Gran Sasso Sci Inst, Viale Francesco Crispi 7, I-67100 Laquila, Italy

[4] ASDC, Via Politecn, I-00133 Rome, Italy

[5] INAF OAR, Via Frascati 33, I-00078 Rome, Italy

[6] INAF IASF Bologna, Via Gobetti 101, I-40129 Bologna, Italy

[7] INAF IASF Milano, Via E Bassini 15, I-20133 Milan, Italy

[8] Osservatorio Astron Cagliari, INAF, Str 54, I-09012 Capoterra, Italy

[9] Univ Trieste, Dip Fis, Via Valerio 2, I-34127 Trieste, Italy

[10] Ist Nazl Fis Nucl, Via Valerio 2, I-34127 Trieste, Italy

[11] INFN Pavia, Via Bassi 6, I-27100 Pavia, Italy

[12] Univ Turin, Dept Phys, CIFS, Via P Giuria 1, I-10125 Turin, Italy

[13] Univ Roma Tor Vergata, Dip Matemat, Via Ric Sci 1, I-00133 Rome, Italy

[14] INFN Roma Tor Vergata, Via Ric Sci 1, I-00133 Rome, Italy

[15] INAF IASF Palermo, Via U La Malfa 153, I-90146 Palermo, Italy

[16] Univ Witwatersrand, Johannesburg, South Africa

[17] INAF Osservatorio Astron Arcetri, Largo Enrico Fermi 5, I-50125 Florence, Italy

[18] ENEA, Via Martiri Monte Sole 4, I-40129 Bologna, Italy

[19] Univ Bologna, Dipartimento Fis & Astron, Viale Berti Pichat 6-2, I-40127 Bologna, Italy

来源：

ASTROPHYSICAL JOURNAL LETTERS | 2016年 / 825卷 / 01期

关键词：

gamma rays: general; gravitational waves; GAMMA-RAY BURST; FERMI OBSERVATIONS; MINI-CALORIMETER; EMISSION; HARD;

D O I：

10.3847/2041-8205/825/1/L4

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report the results of an extensive search through the AGILE data for a gamma-ray counterpart to the LIGO gravitational-wave (GW) event GW150914. Currently in spinning mode, AGILE has the potential of cover 80% of the sky with its gamma-ray instrument, more than 100 times a day. It turns out that AGILE came within a minute of the event time of observing the accessible GW150914 localization region. Interestingly, the gamma-ray detector exposed similar to 65% of this region during the 100 s time intervals centered at -100 and +300 s from the event time. We determine a 2 sigma flux upper limit in the band 50 MeV-10 GeV, UL = 1.9 x 10(-8) erg cm(-2) s(-1), obtained similar to 300 s after the event. The timing of this measurement is the fastest ever obtained for GW150914, and significantly constrains the electromagnetic emission of a possible high-energy counterpart. We also carried out a search for a gamma-ray precursor and delayed emission over five timescales ranging from minutes to days: in particular, we obtained an optimal exposure during the interval -150/-30 s. In all these observations, we do not detect a significant signal associated with GW150914. We do not reveal the weak transient source reported by Fermi-GBM 0.4 s after the event time. However, even though a gamma-ray counterpart of the GW150914 event was not detected, the prospects for future AGILE observations of GW sources are decidedly promising.

引用

页数：9

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