TITLE: GCN CIRCULAR NUMBER: 19728 SUBJECT: GRB 160720A: Lomonosov BDRG gamma ray detection and MASTER limit DATE: 16/07/21 20:28:26 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs A.M.Amelushkin, V.O.Barinova, A.V.Bogomolov, V.V.Bogomolov, A.F.Iyudin, V.V.Kalegaev, M.I.Panasyuk, V.L. Petrov, S.I.Svertilov, I.V.Yashin Physics Department, Skobel`tsyn Institute of Nuclear Physics, Moscow State University. I. Park, J. Lee, S. Jeong Department of Physics, Sungkyunkwan University, Seobu-ro, Jangangu, Suwonsi, Korea V. Lipunov, E.S. Gorbovskoy, N.Tyurina, V.Kornilov, P.Balanutsa, A.Kuznetsov, D.Kuvshinov, Lomonosov Moscow State University, Sternberg Astronomical Institute R. Rebolo, M. Serra Ricart, N. Lodieu, G. Israelian The Instituto de Astrofisica de Canarias At 18:23:55.00 UT on 20 July 2016, the Lomonosov BDRG Gamma-ray Burst Monitor (http://lomonosov.sinp.msu.ru/en/scientific-equipment-2/bdrg ) triggered GRB 160720A (Hamburg and Burns, GCN 19724). GRB 160720A has complicated LC, duration >87s, very with intensive peak between 18:25:12 - 18:25:22 . Peak intensity >30 photons/cm2*s in the range 10-800 s. This Notice was ground-generated. MASTER-IAC robotic telescope (MASTER-Net: http://observ.pereplet.ru) located in IAC (Tenerife) was cavered IPN error box (Hurley et al GCN 19726) GRB160720A error-box 23696 sec after notice time and 30794 sec after trigger time at 2016-07-21 02:57:11 UT. The weather is determined by Sahara dust. The 5-sigma upper limit is about 16.5 mag. The message may be cited.