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The Detection of a SN IIn in Optical Follow-Up Observations of Icecube Neutrino Events

Aartsen, MG and Abraham, K and Ackermann, M and Adams, J and Aguilar, JA and Ahlers, M and Ahrens, M and Altmann, D and Anderson, T and Archinger, M and Arguelles, C and Arlen, TC and Auffenberg, J and Bai, X and Barwick, SW and Baum, V and Bay, R and Beatty, JJ and Becker Tjus, J and Becker, KH and Beiser, E and Benzvi, S and Berghaus, P and Berley, D and Bernardini, E and Bernhard, A and Besson, DZ and Binder, G and Bindig, D and Bissok, M and Blaufuss, E and Blumenthal, J and Boersma, DJ and Bohm, C and Börner, M and Bos, F and Bose, D and Böser, S and Botner, O and Braun, J and Brayeur, L and Bretz, HP and Brown, AM and Buzinsky, N and Casey, J and Casier, M and Cheung, E and Chirkin, D and Christov, A and Christy, B and Clark, K and Classen, L and Coenders, S and Cowen, DF and Cruz Silva, AH and Daughhetee, J and Davis, JC and Day, M and De André, JPAM and De Clercq, C and Dembinski, H and De Ridder, S and Desiati, P and De Vries, KD and De Wasseige, G and De With, M and Deyoung, T and Díaz-Vélez, JC and Dumm, JP and Dunkman, M and Eagan, R and Eberhardt, B and Ehrhardt, T and Eichmann, B and Euler, S and Evenson, PA and Fadiran, O and Fahey, S and Fazely, AR and Fedynitch, A and Feintzeig, J and Felde, J and Filimonov, K and Finley, C and Fischer-Wasels, T and Flis, S and Fuchs, T and Glagla, M and Gaisser, TK and Gaior, R and Gallagher, J and Gerhardt, L and Ghorbani, K and Gier, D and Gladstone, L and Glüsenkamp, T and Perley, DA (2015) The Detection of a SN IIn in Optical Follow-Up Observations of Icecube Neutrino Events. The Astrophysical Journal, 811 (1). ISSN 1538-4357

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The IceCube neutrino observatory pursues a follow-up program selecting interesting neutrino events in real-time and issuing alerts for electromagnetic follow-up observations. In 2012 March, the most significant neutrino alert during the first three years of operation was issued by IceCube. In the follow-up observations performed by the Palomar Transient Factory (PTF), a Type IIn supernova (SN IIn) PTF12csy was found 0.°2 away from the neutrino alert direction, with an error radius of 0.°54. It has a redshift of z = 0.0684, corresponding to a luminosity distance of about 300 Mpc and the Pan-STARRS1 survey shows that its explosion time was at least 158 days (in host galaxy rest frame) before the neutrino alert, so that a causal connection is unlikely. The a posteriori significance of the chance detection of both the neutrinos and the SN at any epoch is 2.2σ within IceCube's 2011/12 data acquisition season. Also, a complementary neutrino analysis reveals no long-term signal over the course of one year. Therefore, we consider the SN detection coincidental and the neutrinos uncorrelated to the SN. However, the SN is unusual and interesting by itself: it is luminous and energetic, bearing strong resemblance to the SN IIn 2010jl, and shows signs of interaction of the SN ejecta with a dense circumstellar medium. High-energy neutrino emission is expected in models of diffusive shock acceleration, but at a low, non-detectable level for this specific SN. In this paper, we describe the SN PTF12csy and present both the neutrino and electromagnetic data, as well as their analysis. © 2015. The American Astronomical Society. All rights reserved.

Item Type: Article
Uncontrolled Keywords: 0201 Astronomical And Space Sciences, 0305 Organic Chemistry, 0306 Physical Chemistry (Incl. Structural)
Subjects: Q Science > QB Astronomy
Q Science > QC Physics
Divisions: Astrophysics Research Institute
Publisher: American Astronomical Society
Date Deposited: 21 Feb 2017 12:02
Last Modified: 07 Sep 2017 13:13
DOI or Identification number: 10.1088/0004-637X/811/1/52
URI: http://researchonline.ljmu.ac.uk/id/eprint/5685

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