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  3. 1 CONTRIBUTI IN RIVISTE (Journal articles)
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Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12386/29524
Title: AGILE Observations of the Gravitational-wave Source GW170817: Constraining Gamma-Ray Emission from an NS-NS Coalescence
Authors: VERRECCHIA, Francesco 
TAVANI, MARCO 
Donnarumma, I.
BULGARELLI, ANDREA 
EVANGELISTA, YURI 
PACCIANI, LUIGI 
URSI, ALESSANDRO 
PIANO, Giovanni 
PILIA, Maura 
CARDILLO , MARTINA 
PARMIGGIANI, NICOLO 
GIULIANI, ANDREA 
PITTORI, Carlotta 
Longo, F.
LUCARELLI, Fabrizio 
MINERVINI, GABRIELE 
FEROCI, MARCO 
ARGAN, ANDREA 
FUSCHINO, FABIO 
LABANTI, CLAUDIO 
Marisaldi, M.
FIORETTI, VALENTINA 
TROIS, ALESSIO 
DEL MONTE, Ettore 
ANTONELLI, Lucio Angelo 
Barbiellini, G.
CARAVEO, PATRIZIA 
Cattaneo, P. W.
Colafrancesco, S.
Costa, E.
D'Amico, F.
Ferrari, A.
Giommi, P.
Morselli, A.
Paoletti, F.
PELLIZZONI, ALBERTO PAOLO 
Picozza, P.
Rappoldi, A.
SOFFITTA, PAOLO 
VERCELLONE, STEFANO 
Baroncelli, L.
Zollino, G.
Issue Date: 2017
Journal: THE ASTROPHYSICAL JOURNAL LETTERS 
Number: 850
Issue: 2
First Page: L27
Abstract: The LIGO-Virgo Collaboration (LVC) detected, on 2017 August 17, an exceptional gravitational-wave (GW) event temporally consistent within ∼ 1.7 {{s}} with the GRB 1708117A observed by Fermi-GBM and INTEGRAL. The event turns out to be compatible with a neutron star-neutron star (NS-NS) coalescence that subsequently produced a radio/optical/X-ray transient detected at later times. We report the main results of the observations by the AGILE satellite of the GW170817 localization region (LR) and its electromagnetic (EM) counterpart. At the LVC detection time T <SUB>0</SUB>, the GW170817 LR was occulted by the Earth. The AGILE instrument collected useful data before and after the GW/GRB event because in its spinning observation mode it can scan a given source many times per hour. The earliest exposure of the GW170817 LR by the gamma-ray imaging detector started about 935 s after T <SUB>0</SUB>. No significant X-ray or gamma-ray emission was detected from the LR that was repeatedly exposed over timescales of minutes, hours, and days before and after GW170817, also considering Mini-calorimeter and Super-AGILE data. Our measurements are among the earliest ones obtained by space satellites on GW170817 and provide useful constraints on the precursor and delayed emission properties of the NS-NS coalescence event. We can exclude with high confidence the existence of an X-ray/gamma-ray emitting magnetar-like object with a large magnetic field of {10}<SUP>15</SUP> {{G}}. Our data are particularly significant during the early stage of evolution of the EM remnant.
URI: http://hdl.handle.net/20.500.12386/29524
URL: https://iopscience.iop.org/article/10.3847/2041-8213/aa965d
ISSN: 2041-8205
DOI: 10.3847/2041-8213/aa965d
Bibcode ADS: 2017ApJ...850L..27V
Fulltext: open
Appears in Collections:1.01 Articoli in rivista

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