//////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 26005 SUBJECT: ANTARES 191011A: AMON + ANTARES Identification of a High-Energy Neutrino + Fermi LAT Coincidence DATE: 19/10/14 13:52:26 GMT FROM: Derek B. Fox at Penn State C. F. Turley and D. B. Fox (for AMON https://www.amon.psu.edu/), M. Ageron (CNRS/CPPM), A.Coleiro (Univ. de Paris/APC), D. Dornic (CNRS/CPPM), & A. Kouchner (Univ. de Paris/APC ) (for ANTARES) report: "During operations of the AMON ANTARES + Fermi LAT neutrino + gamma-ray multimessenger alerts, at 2019 October 11 at 15:54:32 UT, we identified a coincidence between a single ANTARES neutrino and a Fermi LAT photon (false alarm rate of 1.21 per year). An alert was automatically generated and, after human review, distributed to AMON partner facilities at 2019 October 14 at 13:23:22 UT. We are now reporting this alert publicly. Alert details are as follows: Date: 11 October 2019 Time: 15:54:32 UT R.A.: 03:19:51.8 (J2000) Dec.: 18:48:27 (J2000) r_90: 0.40 deg (90%-containment) FAR: 1.212 yr-1 ANTARES 191011A is a high-energy neutrino-induced muon event detected by ANTARES (Ageron et al. 2011) with coordinates R.A. 51.02, Dec. +19.12 (J2000) at 15:57:34 UT, and a p-value based on the number of hits used for the reconstruction of 0.542, which relates to the deposited energy. The minimum false alarm rate coincidence from our analysis associates this neutrino with one Fermi LAT photon. The photon is detected at 15:51:30 UT with coordinates R.A. 49.9403, Dec. 18.7982 and energy 8.6 GeV. The best-fit localization and uncertainty for a point source yielding the ANTARES 191011A neutrino and the photon is as quoted above. The false alarm rate for ANTARES neutrino + Fermi LAT gamma-ray coincidences of this quality or better is 1 per 0.83 years. Details of the ANTARES + Fermi LAT coincidence search procedures are provided in Ayala Solares et al. (AMON + ANTARES) 2019 (ApJ accepted, ArXiv:1904.06420). False alarm rates are established from 73,000 years of simulated observation and take into account the point spread functions of the associated neutrino + photons, the known backgrounds at this sky position, the energy of the neutrino, and the energies of the Fermi LAT photons (within broad ranges). This transient is near the Fermi source 3FGL J0319.8+1847, a blazar also known as RBS0413. The AMON alert for this coincidence is provided in GCN Alert format below." ////////////////////////////////////////////////////////////////////// TITLE: GCN/AMON NOTICE NOTICE_DATE: Fri 11 October 2019 15:54:32.38 UT NOTICE_TYPE: Fermi-LAT ANTARES coincidence AMON_NUM: 1436255238 SRC_RA: 49.9659d {+03:19:51.8} (J2000), 49.2533d {+03:17:00.8} (1950) SRC_DEC: +18.8074d {+18:48:27} (J2000), +18.6271d {+18:37:38} (1950) SRC_ERROR90: 0.40 [deg, stat, 90% containment] DISCOVERY_DATE: 18753 TJD; 284 DOY; 19/10/11 (yy/mm/dd) DISCOVERY_TIME: 57272 SOD {15:54:32.38} UT REVISION: 0 DELTA_T: 363.24 [sec] SIGMA_T: 181.62 [sec] FAR: 1.21 [yr^-1] SUN_POSTN: 197.5417d {+13h 10m 10s} -7.4458d {-07d 26’ 45"} SUN_DIST: 146.52 [deg] Sun_angle= 9.768 [hr] MOON_POSTN: 9.6792d {+00h 38m 43s} -1.2442d {-01d 14’ 39"} MOON_DIST: 44.36 [deg] GAL_COORDS: 165.0713, -31.6601 [deg] galactic lon,lat of the event COMMENTS: ALERT FROM FERMI-LAT ANTARES COINCIDENCE STREAM //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 26006 SUBJECT: ANTARES 191011A: MASTER optical observation befor and after trigger DATE: 19/10/14 18:12:43 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs V. Lipunov, O.Gress, E. Gorbovskoy, V.Kornilov, N.Tyurina, F.Balakin,P.Balanutsa,A.Kuznetsov, V.Vladimirov, D. Vlasenko, I.Gorbunov, D. Zimnukhov, V.Senik, T.Pogrosheva, D.Kuvshinov(Lomonosov Moscow State University, SAI, Physics Department), R. Rebolo, M. Serra(The Instituto de Astrofisica de Canarias), 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), D. Buckley(South African Astronomical Observatory), 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 Global Robotic Net (http://observ.pereplet.ru, Lipunov et al.,2010, Advances in Astronomy, vol.2010, 30L) observed ANTARES 191011A (Turley et al. GCN 26005, Ttrig=2019-10-11 15:54:32UT,Tnotice=2019-10-14 14:18:07UT,RA,Dec(2000)=03:19:51.8 +18:48:27 +-0.4d ) at MASTER-IAC and MASTER-Kislovodsk during MASTER own survey. MASTER didn't receive this alert through usual GCN socket system. MASTER-IAC robotic telescope located in Spain, IAC Teide Observatory, observed Antares 191011A alert errorbox during own survey 1 day 24617 sec after trigger time at 2019-10-12 22:44:49 UT, with upper limit up to 18.4 mag on single images . The observations began at zenit distance = 60 deg. The sun altitude was -54.1 deg. MASTER-Kislovodsk robotic telescope located in Russia, Kislovodsk Solar Station of Pulkovo observatory, observed Antares 191011A alert errorbox 1 days 28366 sec after trigger time at 2019-10-12 23:47:18 UT, with upper limit up to 18.2 mag. The observations began at zenit distance = 26 deg. The sun altitude was -38.6 deg. The galactic latitude b = -60 deg., longitude l = 98 deg. Also we have a several images (4 square degrees) ~14 hours before trigger time at MASTER-IAC with upper limit up to 18.8, made during MASTER own survey. We obtained the following upper limits: Tmid-T0 | Date Time | Site | Coord (J2000) _ |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|_____________________________________|_____|_______|______|________ -50486 | 2019-10-11 01:52:35 | MASTER-IAC | (03h 24m 41.758s ,+17d 56m 09.20s) | C | 60 | 18.8 | -50486 | 2019-10-11 01:52:36 | MASTER-IAC | (03h 16m 09.822s ,+18d 00m 05.97s) | C | 60 | 18.7 | -50047 | 2019-10-11 01:59:54 | MASTER-IAC | (03h 27m 10.598s ,+19d 56m 45.10s) | C | 60 | 18.8 | -50047 | 2019-10-11 01:59:54 | MASTER-IAC | (03h 18m 32.410s ,+20d 00m 35.27s) | C | 60 | 18.6 | 111048 | 2019-10-12 22:44:49 | MASTER-IAC | (03h 24m 45.696s ,+17d 57m 08.38s) | C | 60 | 17.7 | 111078 | 2019-10-12 22:44:49 | MASTER-IAC | (03h 24m 45.697s ,+17d 57m 08.49s) | C | 120 | 18.3 | Coadd 111049 | 2019-10-12 22:44:50 | MASTER-IAC | (03h 16m 13.118s ,+18d 00m 55.10s) | C | 60 | 17.5 | 111079 | 2019-10-12 22:44:50 | MASTER-IAC | (03h 16m 13.118s ,+18d 00m 55.06s) | C | 120 | 18.2 | Coadd 111185 | 2019-10-12 22:47:06 | MASTER-IAC | (03h 18m 31.476s ,+20d 00m 25.29s) | C | 60 | 17.6 | 111215 | 2019-10-12 22:47:06 | MASTER-IAC | (03h 18m 31.481s ,+20d 00m 25.33s) | C | 120 | 18.3 | Coadd 111185 | 2019-10-12 22:47:06 | MASTER-IAC | (03h 27m 10.213s ,+19d 56m 38.51s) | C | 60 | 17.9 | 111215 | 2019-10-12 22:47:06 | MASTER-IAC | (03h 27m 10.214s ,+19d 56m 38.66s) | C | 120 | 18.4 | Coadd 113619 | 2019-10-12 23:27:40 | MASTER-IAC | (03h 16m 10.561s ,+18d 00m 52.50s) | C | 60 | 17.8 | 113619 | 2019-10-12 23:27:40 | MASTER-IAC | (03h 24m 44.154s ,+17d 57m 10.10s) | C | 60 | 18.0 | 113757 | 2019-10-12 23:29:59 | MASTER-IAC | (03h 18m 29.321s ,+20d 00m 31.83s) | C | 60 | 17.9 | 113757 | 2019-10-12 23:29:59 | MASTER-IAC | (03h 27m 09.160s ,+19d 56m 49.43s) | C | 60 | 18.1 | 114797 | 2019-10-12 23:47:18 | MASTER-Kislovodsk | (03h 26m 21.586s ,+18d 04m 20.23s) | C | 60 | 17.7 | 114797 | 2019-10-12 23:47:18 | MASTER-Kislovodsk | (03h 17m 35.971s ,+18d 29m 50.56s) | C | 60 | 18.0 | 114894 | 2019-10-12 23:48:56 | MASTER-Kislovodsk | (03h 19m 58.458s ,+20d 28m 33.57s) | C | 60 | 18.2 | Filter C is a clear (unfiltred) band. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=1166369 The observation,reduction, analysys will be continued. This message can be cited. //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 26035 SUBJECT: FACT follow-up of ANTARES-Fermi 191011A DATE: 19/10/19 18:14:10 GMT FROM: Daniela Dorner at U of Wuerzburg A. Biland (ETH Zurich) reports on behalf of the FACT Collaboration: AMON and ANTARES announced on Oct 14th the identification of the coincidence of a high-energy neutrino with a Fermi-LAT photon on Oct 11th 15:54:32 UTC from a position close to the blazar RBS 0413. Due to safety constraints and not ideal weather conditions, FACT started observing RBS 0413 only in the night from Oct 17th to Oct 18th. During this night, only 10 minutes of data have been taken due to not ideal weather conditions. During the following night, another 170 minutes of data have been taken. The automatic quick-look analysis does not show any signal from the observed position. Preliminary results can be found at https://fact-project.org/monitoring/index.php?y=2019&m=10&d=18&source=3261&timebin=12&plot=week From the results of the quick-look analysis, an upper limit of 20% of the flux of the Crab Nebula at TeV energies was determined with a confidence level of 99%. Contact person: Daniela Dorner (dorner@astro.uni-wuerzburg.de) The First G-APD Cherenkov Telescope (FACT) is an imaging air Cherenkov telescope monitoring blazars at TeV energies. It is located in the Observatorio del Roque de los Muchachos on the Canary Island La Palma.