AGILE detection of gamma-ray sources coincident with cosmic neutrino events

Abstract

The origin of cosmic neutrinos is still largely unknown. Using data obtained by the gamma-ray imager on board of the AGILE satellite, we systematically searched for transient gamma-ray sources above 100 MeV that are temporally and spatially coincident with ten recent high-energy neutrino IceCube events. We find three AGILE candidate sources that can be considered possible counterparts to neutrino events. Detecting 3 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.

arXiv comment21 pages, 15 figures, 4 tables. Accepted for publication in ApJ

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Cited by in corpus (10)

• Dissecting the regions around IceCube high-energy neutrinos: growing evidence for the blazar connection
• Investigation of two Fermi-LAT gamma-ray blazars coincident with high-energy neutrinos detected by IceCube
• 3HSP J095507.9+355101: a flaring extreme blazar coincident in space and time with IceCube-200107A
• Multi-Frequency Observations of the Candidate Neutrino Emitting Blazar BZB J0955+3551
• Neutrino follow-up with the Zwicky Transient Facility: Results from the first 24 campaigns
• The spectra of IceCube neutrino candidate sources -- I. Optical spectroscopy of blazars
• The AGILE real-time analysis pipelines in the multi-messenger era
• Atmospheric Cherenkov Telescopes as a Potential Veto Array for Neutrino Astronomy
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• Testing Weak Equivalence Principle with IceCube Event and Blazar