EPJ Web Conf.
Volume 207, 2019Very Large Volume Neutrino Telescopes (VLVnT-2018)
|Number of page(s)||5|
|Section||High-Energy and Multi-Messenger Physics|
|Published online||10 May 2019|
Dissecting the region around IceCube-170922A: the blazar TXS 0506+056 as the first cosmic neutrino source
Technische Universität München, Physik-Department, James-Frank-Str.1, D-85748 Garching bei München, Germany
2 European Southern Observatory, Karl-Schwarzschild-Str. 2, D-85748 Garching bei München, Germany
3 Agenzia Spaziale Italiana, ASI, via del Politecnico s.n.c., I-00133 Roma Italy
4 Institute for Advanced Studies, Technische Universität München, Lichtenbergstrasse 2a, D-85748 Garching bei München, Germany
5 ICRANet, Piazzale della Repubblica,10 - 65122, Pescara, Italy
6 Instituto de Física Gleb Wataghin, UNICAMP, R. Sérgio Buarque de Holanda 777
7 ICRANet-Rio, CBPF, Rua Dr. Xavier Sigaud 150, 22290-180 URCA, Rio de Janeiro, Brazil
8 ICRANet-Armenia, Marshall Baghramian Avenue 24a, 0019 Yerevan, Republic of Armenia
* e-mail: email@example.com
Published online: 10 May 2019
On MJD 58018 the IceCube neutrino observatory detected a highlyenergetic, well-reconstructed neutrino, IceCube-170922A, at a distance of 0:1° to a γ-ray flaring blazar, TXS 0506+056. Follow-up searches in archival data additionally revealed a larger flare of neutrinos from the same direction. In order to complete the picture we present here a full multi-wavelength study of the region around IceCube-170922A. While we identify also other non-thermal counterpart candidates, we show that all the evidence points to TXS 0506+056 as the dominant neutrino emitter. Additionally, an analysis of all the available Fermi-LAT data indicates a hard spectrum/low flux of TXS 0506+056 during the neutrino flare in contrast to a soft spectrum/high flux at the arrival time of IceCube-170922A. Putting all the pieces together we conclude that the SED of TXS 0506+056 can be energetically reconnected for both neutrino observations.
© The Authors, published by EDP Sciences, 2019
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