//////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 28950 SUBJECT: AMON Coincidence Alert from the sub-threshold IceCube-HAWC search NuEm-201124A DATE: 20/11/24 17:12:28 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 5.99 hours. The HAWC transit interval is from 11, 24, 2020 08:14:10 UT to 11 24, 2020, at 14:13:37 UT (End of the HAWC transit time) The location of the coincidence is reported as RA (J2000): 134.99 deg Dec (J2000): 7.74 deg Location uncertainty (50% containment): 0.23 deg (statistical only). Location uncertainty (90% containment): 0.42 deg (statistical only). The false alarm rate (FAR) of this coincidence is 2.96 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 on the IceCube collaboration: http://icecube.wisc.edu/ Information on the HAWC collaboration: https://www.hawc-observatory.org //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 28951 SUBJECT: IceCube Alert 201124.34: Global MASTER-Net observations report DATE: 20/11/24 23:39:09 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-Tavrida robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Russia (Lomonosov MSU, SAI Crimea astronomical station) was pointed to the IceCube Alert 201124.34 (trigger No 68186,08h 59m 57.60s , +07d 44m 24.0s, R=0.5) errorbox 31682 sec after notice time and 54964 sec after trigger time at 2020-11-24 23:30:51 UT, with upper limit up to 15.8 mag. The observations began at zenith distance = 52 deg. The sun altitude is -55.8 deg. The galactic latitude b = 33 deg., longitude l = 222 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=1489345 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 55055 | 2020-11-24 23:30:51 | MASTER-Tavrida | (08h 56m 03.56s , +07d 58m 48.8s) | C | 180 | 15.8 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited.