TITLE: GCN CIRCULAR NUMBER: 26143 SUBJECT: Baksan Neutrino Observatory Alert 191102.06: Global MASTER-Net observations report DATE: 19/11/02 02:21:24 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs V. Lipunov, E. Gorbovskoy, N.Tyurina, V.Kornilov, P.Balanutsa, I.Gorbunov, D.Vlasenko, V.Vladimirov, A.Kuznetsov, A. Chasovnikov, V.Topolev, D.Kuvshinov, F.Balakin, V.A. Senik (Lomonosov Moscow State University, SAI, Physics Department), V.B. Petkov, M.M. Boliev, A.N. Kurenya, (Baksan Neutrino Observatory, Institute for Nuclear Research of RAS, Moscow, Russia), R. Rebolo, M. Serra, N. Lodieu, G. Israelian, L. Suarez-Andres (The Instituto de Astrofisica de Canarias), D. Buckley (South African Astronomical Observatory), N.M. Budnev, O. Gress, O.Ershova (Applied Physics Institute, Irkutsk State University), V. Yurkov, A. Gabovich, Yu. Sergienko, D. Kobcev (Blagoveschensk Educational State University), A. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory), R. Podesta, C. Lopez, C.Francile, F. Podesta (Observatorio Astronomico Felix Aguilar OAFA, San Juan National University), H.Levato (Instituto de Ciencias Astronomicas, de la Tierra y del Espacio ICATE SJNU) MASTER-SAAO robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in South Africa (South African Astronomical Observatory) started inspect of the Baksan Neutrino Observatory Alert 191102.06 (trigger No 1623374707,01h 05m 36.000s , -04d 30m 00.00s, R=3) errorbox 839 sec after trigger time at 2019-11-02 01:39:06 UT, with upper limit up to 18.5 mag. The observations began at zenith distance = 71 deg. The sun altitude is -23.8 deg. The galactic latitude b = -60 deg., longitude l = 98 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=1185008 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 924 | 2019-11-02 01:39:06 | MASTER-SAAO | (01h 01m 32.719s , -04d 35m 55.62s) | C | 170 | 18.5 | 1120 | 2019-11-02 01:42:17 | MASTER-SAAO | (01h 01m 28.711s , -04d 36m 57.14s) | C | 180 | 17.8 | 1322 | 2019-11-02 01:45:39 | MASTER-SAAO | (01h 01m 34.701s , -04d 36m 33.46s) | C | 180 | 16.9 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited.