TITLE: GCN CIRCULAR NUMBER: 26220 SUBJECT: LIGO/Virgo S191110af: Global MASTER-Net observations report DATE: 19/11/10 23:49:02 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs . 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 (Lomonosov Moscow State University, SAI, Physics Department), 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), 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) started inspect of the LIGO/Virgo S191110af errorbox 41 sec after trigger time at 2019-11-10 23:07:25 UT, with upper limit up to 16.5 mag. The observations began at zenith distance = 78 deg. The sun altitude is -55.8 deg. MASTER-Kislovodsk robotic telescope located in Russia (Lomonosov MSU, Kislovodsk Solar Station of Pulkovo observatory) started inspect of the LIGO/Virgo S191110af errorbox 240 sec after trigger time at 2019-11-10 23:10:44 UT, with upper limit up to 16.9 mag. The observations began at zenith distance = 79 deg. The sun altitude is -51.3 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/ligo_1.php?id=10908 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 71 | 2019-11-10 23:07:25 | MASTER-Tavrida | (16h 07m 26.66s , +57d 55m 00.4s) | C | 60 | 16.1 | 188 | 2019-11-10 23:09:22 | MASTER-Tavrida | (17h 02m 30.68s , +59d 58m 16.8s) | C | 60 | 16.5 | 270 | 2019-11-10 23:10:44 | MASTER-Kislovodsk | (15h 36m 28.22s , +55d 56m 45.4s) | C | 60 | 16.9 | 270 | 2019-11-10 23:10:44 | MASTER-Kislovodsk | (15h 50m 47.97s , +55d 29m 20.1s) | C | 60 | 16.9 | 304 | 2019-11-10 23:11:17 | MASTER-Tavrida | (17h 05m 18.61s , +59d 53m 22.1s) | C | 60 | 16.0 | 419 | 2019-11-10 23:13:13 | MASTER-Tavrida | (16h 49m 58.92s , +58d 01m 16.2s) | C | 60 | 15.0 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited.