//////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 30010 SUBJECT: AMON Coincidence Alert from the sub-threshold IceCube-HAWC search NuEM-210515A and 210515B DATE: 21/05/15 03:15:53 GMT FROM: Hugo Ayala at Pennsylvania State University The AMON, IceCube, and HAWC collaborations report: The AMON NuEm stream channel found two coincidence alerts 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 hours. NuEM-210515A The HAWC transit interval starts from 05-14-2021 18:06:02 UT to 05-15-2021 00:20:43 UT (End of the HAWC transit time) The location of the coincidence is reported as RA (J2000): 93.64deg Dec (J2000): 14.66 deg Location uncertainty (50% containment): 0.15 deg (statistical only). Location uncertainty (90% containment): 0.27 deg (statistical only). The false alarm rate (FAR) of this coincidence is 3.93 per year. NuEM-210515B The HAWC transit interval starts from 05-14-2021 18:09:25 UT to 05-15-2021 00:19:27 UT (End of the HAWC transit time) The location of the coincidence is reported as RA (J2000): 93.93deg Dec (J2000): 12.51deg Location uncertainty (50% containment): 0.20 deg (statistical only). Location uncertainty (90% containment): 0.36 deg (statistical only). The false alarm rate (FAR) of this coincidence is 1.90 per year. We encourage follow-up observations of the alert region contingent on availability of resources and interest, given the quoted FAR. 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 of this analysis https://iopscience.iop.org/article/10.3847/1538-4357/abcaa4 Information on the IceCube collaboration: http://icecube.wisc.edu/ Information on the HAWC collaboration: https://www.hawc-observatory.org //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 30044 SUBJECT: IceCube Alert 210515.01: Global MASTER-Net observations report DATE: 21/05/17 23:39:48 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs V. Lipunov, E. Gorbovskoy, V.Kornilov, N.Tyurina, P.Balanutsa, A.Kuznetsov, F.Balakin, V.Vladimirov, D. Vlasenko, I.Gorbunov, D.Zimnukhov, V.Senik, T.Pogrosheva, D.Kuvshinov, D. Cheryasov (Lomonosov Moscow State University, SAI, Physics Department), R. Podesta, C.Lopez, F. Podesta, C.Francile (Observatorio Astronomico Felix Aguilar OAFA), R. Rebolo, M. Serra (The Instituto de Astrofisica de Canarias), D. Buckley (South African Astronomical Observatory), O.A. Gres, N.M. Budnev, O.Ershova (Irkutsk State University, API), A. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory), V. Yurkov, A. Gabovich, Yu. Sergienko (Blagoveschensk Educational State University) MASTER-OAFA robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Argentina (OAFA observatory of San Juan National University) was pointed to the IceCube Alert 210515.01 (trigger No 210514180925,06h 15m 43.20s , +12d 30m 36.0s, R=0.4) errorbox 2 days 47408 sec after notice time and 2 days 82706 sec after trigger time at 2021-05-17 23:17:53 UT, with upper limit up to 15.9 mag. The observations began at zenith distance = 75 deg. The sun altitude is -19.6 deg. The galactic latitude b = -1 deg., longitude l = 198 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=1613516 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 255536 | 2021-05-17 23:17:53 | MASTER-OAFA | (06h 08m 18.87s , +11d 53m 26.4s) | C | 60 | 15.1 | 255616 | 2021-05-17 23:19:12 | MASTER-OAFA | (06h 16m 33.89s , +11d 55m 22.7s) | C | 60 | 15.9 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited.