https://doi.org/10.1051/epjconf/201920702003
Dissecting the region around IceCube-170922A: the blazar TXS 0506+056 as the first cosmic neutrino source
1
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: theo.glauch@tum.de
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
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
