//////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 26963 SUBJECT: AMON Coincidence Alert from the sub-threshold IceCube-HAWC search NuEm-200202A DATE: 20/02/02 16:33:45 GMT FROM: Hugo Ayala at Pennsylvania State University The AMON, IceCube and HAWC collaborations report: The AMON NuEm stream channel found a coincidence alert from the IceCube online neutrino selection + HAWC daily monitoring analysis. The analysis looks for IceCube neutrino events -mostly atmospheric in origin- around the position and transit time of a HAWC cluster of likely gamma rays, as identified in the integrated observations from a single transit, in this case having a duration of 6.16 hours. The HAWC transit interval is from 02, 02, 2020 7:58:52 UT to 02 02, 2020, at 14:07:52 UT (End of the HAWC transit time) The location of the coincidence is reported as RA (J2000): 200.3 deg Dec (J2000): 12.71 deg Location uncertainty (50% containment): 0.17 deg (statistical only). Location uncertainty (90% containment): 0.31 deg (statistical only). The false alarm rate (FAR) of this coincidence is 1.39. We encourage follow-up observations of the alert region contingent on availability of resources and interest, given the quoted FAR. These circulars will be substituted for GCN Notices in the near future. AMON seeks to perform a real-time correlation analysis of the high-energy signals across all known astronomical messengers. More information about AMON can be found in https://www.amon.psu.edu/ Information on the IceCube collaboration: http://icecube.wisc.edu/ Information on the HAWC collaboration: https://www.hawc-observatory.org //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 26973 SUBJECT: AMON IceCube-HAWC_200202A: MASTER optical inspect DATE: 20/02/03 13:30:10 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs V. Lipunov, O.Gress, E. Gorbovskoy, N.Tiurina, V.Kornilov, P.Balanutsa,A.Kuznetsov, V. Vladimirov, D. Vlasenko, F.Balakin, I.Gorbunov, D.Zimnukhov, V.Senik, T.Pogrosheva, D. Kuvshinov, V.Shumkov (Lomonosov Moscow State University, SAI, Physics Department), D. Buckley(South African Astronomical Observatory), R. Rebolo, M. Serra(The Instituto de Astrofisica de Canarias), A. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory), R. Podesta, C.Lopez, F. Podesta, C.Francile(Observatorio Astronomico Felix Aguilar OAFA), H. Levato(Instituto de Ciencias Astronomicas, de la Tierra y del Espacio ICATE), O.A. Gres, N.M. Budnev, O.Ershova (Irkutsk State University, API), V. Yurkov, A. Gabovich, Yu. Sergienko(Blagoveschensk Educational State University) MASTER Global Robotic Net (http://observ.pereplet.ru, Lipunov et al., 2010,Advances in Astronomy,v. 2010, 30L) observed IceCube-HAWC 200202A (error-bx AMON GCN 26963) since 2020-02-02 21:50:53 UT.o MASTER-Amur robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Russia (Blagoveshchensk State Pedagogical University) was pointed to the IceCube Alert 200202.33 (trigger No 20200202075852,13h 21m 12.00s , +12d 42m 36.0s, R=0.3) errorbox 49921 sec after trigger time at 2020-02-02 21:50:53 UT, with upper limit up to 17.2 mag. Observations started at twilight. The observations began at zenith distance = 44 deg. The sun altitude is -11.8 deg. MASTER-Tunka robotic telescope located in Russia (Applied Physics Institute, Irkutsk State University) was pointed to the IceCube Alert 200202.33 errorbox 50850 sec after trigger time at 2020-02-02 22:06:22 UT, with upper limit up to 18.2 mag. The observations began at zenith distance = 39 deg., sun altitude was -24.6 deg. MASTER-SAAO robotic telescope located in South Africa (South African Astronomical Observatory) was pointed to the IceCube Alert 200202.33 errorbox 53716 sec after trigger time at 2020-02-02 22:54:08 UT, with upper limit up to 20.4 mag. The observations began at zenith distance = 76 deg., sun altitude was -41.2 deg. MASTER-IAC robotic telescope located in Spain (IAC Teide Observatory) was pointed to the IceCube Alert 200202.33 errorbox 59842 sec after trigger time at 2020-02-03 00:36:14 UT, with upper limit up to 21.5 mag. The observations began at zenith distance = 69 deg.,sun altitude was -75.5 deg. The error-box galactic latitude b = 73 deg., longitude l = 332 deg. Auto-detection system marginally found possible OT in SDSS J132141.10+125747.3 with m ~ 19.6 (host galaxy photom.z~0.47749). But hand analysis do not strong supply this resuts. There is QSO SDSS_J13210+1237 in error-box, but it didn't change the brightness Reduction and analysys of galaxy clusters inside error-box will be continued. //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 26976 SUBJECT: AMON IceCube-HAWC_200202A : No neutrino counterpart seen with ANTARES DATE: 20/02/03 19:21:00 GMT FROM: Antoine Kouchner at ANTARES Collaboration Alexis Coleiro (APC/Universite de Paris) and Damien Dornic (CPPM/CNRS) on behalf of the ANTARES Collaboration.
Using data from the ANTARES detector, we have performed a follow-up analysis of the recently reported AMON Coincidence Alert from the sub-threshold IceCube-HAWC search NuEm-200202A (GCN 26963>). The location of the potential source was visible (below the horizon) for ANTARES only part of the HAWC time transit interval (lasting 6.16 hours), from 10:48 to 14:07 (UTC)
No up-going muon neutrino candidate events were recorded at the location of the source coordinates (accounting for the reported uncertainties) during a +/- 1 day time-window before and after the time transit interval considered, and over which the potential source was visible 43% of the time.
ANTARES > is the largest undersea neutrino detector (Mediterranean Sea) and it is primarily sensitive to astrophysical neutrinos in the TeV-PeV energy range. At 10 TeV, the median angular resolution for muon neutrinos is about 0.5 degrees. In the range 1-100 TeV ANTARES has a competitive sensitivity to this position in the sky.