TITLE: GCN CIRCULAR NUMBER: 26784 SUBJECT: LIGO/Virgo S200116ah: Global MASTER-Net observations report DATE: 20/01/16 12:09:54 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), 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-Tunka robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Russia (Applied Physics Institute, Irkutsk State University) started inspect of the LIGO/Virgo S200116ah errorbox 85 sec after notice time and 344 sec after trigger time at 2020-01-16 12:02:26 UT, with upper limit up to 17.3 mag. The observations began at zenith distance = 56 deg. The sun altitude is -23.3 deg. MASTER-Amur robotic telescope located in Russia (Blagoveshchensk State Pedagogical University) started inspect of the LIGO/Virgo S200116ah errorbox 127 sec after notice time and 385 sec after trigger time at 2020-01-16 12:03:07 UT, with upper limit up to 17.4 mag. The observations began at zenith distance = 46 deg. The sun altitude is -38.7 deg. The galactic latitude b = 16 deg., longitude l = 16 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/ligo_1.php?id=11258 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 379 | 2020-01-16 12:02:26 | MASTER-Tunka | (05h 26m 46.70s , +07d 56m 47.6s) | P| | 70 | 17.3 | 416 | 2020-01-16 12:03:07 | MASTER-Amur | (05h 08m 58.09s , +05d 13m 55.9s) | C | 60 | 17.4 | 495 | 2020-01-16 12:04:27 | MASTER-Amur | (05h 08m 58.11s , +05d 13m 08.1s) | C | 60 | 17.3 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited.