Multi-epoch monitoring of TXS 0506+056 with MAGIC and MWL partners
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A4 Artikkeli konferenssijulkaisussa
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Date
2022-03-18
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en
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Proceedings of Science, Volume 395
Abstract
The measurement of an astrophysical flux of high-energy neutrinos by IceCube is an important step towards finding the long-sought sources of cosmic rays. Nevertheless, the long exposure neutrino sky map shows no significant indication of point sources so far. The real-time followup of neutrino events turned out to be the most successful approach in neutrino point-source searches. It brought, among others, the most compelling evidence for a neutrino point source: the flaring gamma-ray blazar TXS 0506+056 in coincidence with a single high-energy neutrino from IceCube (IceCube-170922A). The fast multiwavelength(MWL) follow-up of this alert was key for establishing this coincidence and constraining the subsequent theoretical modeling for this event. In the long run, accurate and contemporaneous MWL spectral measurements are essential ingredients in investigating the physical processes leading to particle acceleration and emission of radiation. A deeper understanding of those processes allows us to put constraints on the potential neutrino emission. Here we present the light curves and simultaneous spectral energy distributions from November 2017 till February 2021 of MAGIC and MWL monitoring of TXS 0506+056. The more than two-year-long rise and high state of the radio light curve of TXS 0506+056, which started near the time of the IceCube neutrino detection, seems to have ended, as indicated by a steep decrease in the first half of 2021. We also present the theoretical interpretation of our observations.Description
Funding Information: The Australia Telescope Compact Array is part of the Australia Telescope National Facility which is funded by the Australian Government for operation as a National Facility managed by CSIRO. We acknowledge the Gomeroi people as the traditional owners of the Observatory site. Funding Information: The members of the MAGIC Collaboration gratefully acknowledge financial support from the agencies and organizations listed here: https://magic.mpp.mpg.de/acknowledgments_ ICRC2021 This research is partly based on observations with the 100-m telescope of the MPIfR (Max-Planck-Institut für Radioastronomie) at Effelsberg. Funding Information: This research has made use of data from the OVRO 40-m monitoring program which was supported in part by NASA grants NNX08AW31G, NNX11A043G and NNX14AQ89G, and NSF grants AST-0808050 and AST-1109911, and private funding from Caltech and the MPIfR. Publisher Copyright: © Copyright owned by the author(s) under the terms of the Creative Commons.
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Satalecka, K, Aniello, T, Bernardini, E, Bhattacharyya, W, Cerruti, M, D'Ammando, F, Prandini, E, Righi, C, Sahakyan, N, Viale, I, Edwards, P G, Ojha, R, Stevens, J, Hovatta, T, Kiehlmann, S, Readhead, A C S, Eppel, F, Gokus, A, Heßdörfer, J, Kadler, M, Paraschos, G F, Sinapius, J, Rösch, F, ATCA, OVRO, TELAMON Collaboration & MAGIC Collaboration 2022, ' Multi-epoch monitoring of TXS 0506+056 with MAGIC and MWL partners ', Proceedings of Science, vol. 395, 875 . https://doi.org/10.22323/1.395.0875