1. AGILE Detection of Gamma-Ray Sources Coincident with Cosmic Neutrino Events.
- Author
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F. Lucarelli, M. Tavani, G. Piano, A. Bulgarelli, I. Donnarumma, F. Verrecchia, C. Pittori, L. A. Antonelli, A. Argan, G. Barbiellini, P. Caraveo, M. Cardillo, P. W. Cattaneo, A. Chen, S. Colafrancesco, E. Costa, E. Del Monte, G. Di Cocco, A. Ferrari, and V. Fioretti
- Subjects
NEUTRINOS ,COSMIC neutrino background ,GAMMA ray sources ,EXTRAGALACTIC distances ,ARTIFICIAL satellites in astronomy - Abstract
The origin of cosmic neutrinos is still largely unknown. Using data obtained by the gamma-ray imager on board the Astro-rivelatore Gamma a Immagini Leggero (AGILE) satellite, we systematically searched for transient gamma-ray sources above 100 MeV that are temporally and spatially coincident with 10 recent high-energy neutrino IceCube events. We found three AGILE candidate sources that can be considered possible counterparts to neutrino events. Detecting three gamma-ray/neutrino associations out of 10 IceCube events is shown to be unlikely due to a chance coincidence. One of the sources is related to the BL Lac source TXS 0506+056. For the other two AGILE gamma-ray sources there are no obvious known counterparts, and both Galactic and extragalactic origin should be considered. [ABSTRACT FROM AUTHOR]
- Published
- 2019
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