TITLE: GCN CIRCULAR NUMBER: 18903 SUBJECT: LIGO/Virgo G184098: MASTER final result DATE: 16/01/19 20:53:36 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs V. Lipunov, E. Gorbovskoy, N.Tyurina Lomonosov Moscow State University, Sternberg Astronomical Institute D.Buckley, S. Potter, M. Kotze South African Astronomical Observatory R. Rebolo, M. Serra, N. Lodieu, G. Israelian The Instituto de Astrofisica de Canarias N.M.Budnev, K.Ivanov, O.Gress Irkutsk State University V.Yurkov, Yu.Sergienko, A.Gabovich Blagoveschensk Educational State University, Blagoveschensk A. Tlatov, V.Sennik Kislovodsk Solar Station of the Pulkovo Observatory We reducted our images corresponds to final error box (GCN 18858). We observed localizations of the G184098 since 2015-09-20 03:25:02 till 2015-09-20 03:25:02 to every night for ~2 hours before sunrise, when the field reached a 15 degrees altitude. We miss full 2015-09-18 night due to bad weather. Totaly we cover 44.88% of full probability of final error box with upper limits ~19.0. MASTER SAAO observations of G184098 cover map available here: http://master.sai.msu.ru/static/G184098/G184098_3.png MASTER SAAO all observations during a 6 days after G184098 http://master.sai.msu.ru/static/G184098/G184098_2.png MASTER-NET all observations during a 6 days after G184098 http://master.sai.msu.ru/static/G184098/G184098_4.png No interesting from gravitational waves point of view OTs was found.