TITLE: GCN CIRCULAR NUMBER: 22945 SUBJECT: IceCube-171106A: MASTER optical observation DATE: 18/07/14 12:49:20 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs V. Lipunov, E. Gorbovskoy, V.Kornilov, N.Tiurina, A.Kuznetsov, V.Chazov, I. Gorbunov, D. Vlasenko, D.Zimnukhov, D.Kuvshinov, P.Balanutsa, V.Vladimirov Lomonosov Moscow State University,SAI D. Buckley, South African Astronomical Observatory (SAAO) R. Rebolo, M. Serra, N. Lodieu, G. Israelian, L. Suarez-Andres The Instituto de Astrofisica de Canarias (IAC) A. Tlatov, V.Senik, D. Dormidontov Kislovodsk Solar Station of the Pulkovo Observatory R. Podesta, F. Podesta, C. Lopez, C.Francile Observatorio Astronomico Felix Aguilar (OAFA) H.Levato, Instituto de Ciencias Astronomicas, de la Tierra y del Espacio (ICATE) O. Gres, N.M.Budnev, Yu.Ishmuhametova Irkutsk State University (ISU) A. Gabovich, V. Yurkov, Yu. Sergienko Blagoveschensk Educational State University (BSPU) MASTER Global Robotic Net observed the field of the IceCube EHE event IceCube-171106A Taboada et al. GCN 22105 (also observed by Swift, see Keivani et al. ATEL #10942) The IC171106A altitude at alert time (Date: 17/11/06 18:39:39.21 UT J2000 RA:340.00 (-0.50/+0.70 deg 90% PSF containment) Dec: +7.40 (-0.25/+0.35 deg 90% PSF containment)) MASTER-IAC (Tenerife) Object: Altitude: 54.48 Azimuth: 300.17 Sun: Altitude: -5.64 Azimuth: 74.70 Moon: Altitude: -22.37 Azimuth: 232.01 MASTER-SAAO (South Africa) Object: Altitude: 49.68 Azimuth: 169.40 Sun: Altitude: -18.49 Azimuth: 56.02 Moon: Altitude: -11.82 Azimuth: 255.21 MASTER-Kislovodsk (Russia) Object: Altitude: 45.89 Azimuth: 43.01 Sun: Altitude: -50.59 Azimuth: 123.99 Moon: Altitude: 26.64 Azimuth: 269.05 MASTER-Tavrida Object: Altitude: 48.79 Azimuth: 31.15 Sun: Altitude: -44.81 Azimuth: 115.65 Moon: Altitude: 20.62 Azimuth: 263.71 MASTER-Kislovodsk pointed to the IC 171106A at 2017-11-06 18:40:45UT, 66s after trigger time . There were 4 alert images: Date,UT Exp mlim MASTERtube 2017-11-06 18:50:16 180 19.3 EAST 2017-11-06 18:47:06 180 19.3 EAST 2017-11-06 18:43:56 180 19.1 EAST 2017-11-06 18:40:45 180 18.9 EAST then MASTER-Kislovodsk returned to Fermi trigger 531665037 inspection https://gcn.gsfc.nasa.gov/other/531665037.fermi (GRB_TIME: 17/11/06 12:43:52.33UT 02h 00m 50s +59d 29' 24") MASTER-SAAO was pointed to IC 171106A at 2017-11-06 18:40:50UT 71s after trigger time Unfiltered limits of alert images are the following: Date,UT Exp mlim MASTER_tube 2017-11-06 18:40:50 540 20.3 EAST 2017-11-06 18:40:50 180 19.9 EAST 2017-11-06 18:40:50 540 20.6 WEST 2017-11-06 18:40:50 180 20.2 WEST 2017-11-06 18:44:07 180 20.0 EAST 2017-11-06 18:44:07 180 20.2 WEST 2017-11-06 18:47:22 180 20.0 EAST 2017-11-06 18:50:38 180 20.0 EAST 2017-11-06 18:50:38 180 20.1 WEST 2017-11-29 18:44:51 180 19.4 EAST 2017-11-29 18:44:51 540 19.6 EAST 2017-11-29 18:44:51 180 19.1 WEST 2017-11-29 18:44:51 540 19.9 WEST 2017-11-29 18:49:52 180 19.0 EAST 2017-11-29 18:49:52 180 19.4 WEST 2017-11-29 18:53:56 180 18.9 EAST 2017-11-29 18:53:56 180 19.1 WEST 2017-11-29 19:11:09 540 19.8 EAST 2017-11-29 19:11:09 180 19.0 EAST 2017-11-29 19:11:09 180 19.4 WEST 2017-11-29 19:11:09 540 20.0 WEST 2017-11-29 19:17:27 180 19.1 EAST 2017-11-29 19:17:27 180 19.3 WEST 2017-11-29 19:24:21 180 19.1 EAST 2017-11-29 19:24:21 180 19.3 WEST 2017-11-29 19:30:27 180 19.0 EAST 2017-11-29 19:30:27 180 19.3 WEST MASTER-IAC pointed to the IC 171106A at 2017-11-06 18:41:11UT 91.8s after trigger time. The Sun_Altitude was -5.64, and so as MASTER-Kislovodsk and MASTER-SAAO followed up alert observations, MASTER-IAC followed Fermi inspection after sunset, and followed IceCube inspection on next day by usual inspect program 2017-11-07 19:33:49 540 20.0 EAST 2017-11-07 19:33:49 180 19.3 EAST 2017-11-07 19:37:42 540 20.0 WEST 2017-11-07 19:37:42 180 19.6 WEST 2017-11-07 19:37:36 180 19.4 EAST 2017-11-07 19:41:35 180 19.6 WEST 2017-11-07 19:41:35 180 19.4 EAST 2017-11-07 19:45:36 180 17.8 WEST 2017-11-07 19:49:45 180 18.7 EAST 2017-11-07 19:53:17 180 18.9 EAST 2017-11-07 19:53:17 180 18.0 WEST MASTER-Tavrida started inspect IC171106A in a weak as usual inspect program on 2017-11-13 19:03:59 UT with the following unfiltered limits Date,UT Exp mlim MASTER_tube 2017-11-13 19:55:03 180 18.4 EAST 2017-11-13 19:55:03 180 17.8 WEST 2017-11-13 19:51:01 180 18.8 WEST 2017-11-13 19:47:28 180 18.8 WEST 2017-11-13 19:32:55 180 18.8 WEST 2017-11-13 19:29:21 180 18.8 WEST 2017-11-13 19:25:45 540 19.5 WEST 2017-11-13 19:25:45 180 18.8 WEST 2017-11-13 19:07:32 180 18.0 WEST 2017-11-13 19:03:59 180 18.0 WEST There is one BL Lac type object with Radio and Gamma inside IceCube error box (see Gamma-ray blazar candidates (Sowards-Emmerd+, 2005) J223810.3+072413 . There are large number AGN and QSO candidates. This message may be cited.