TITLE: GCN CIRCULAR NUMBER: 19768 SUBJECT: GRB160804A: MASTER-SAAO observation DATE: 16/08/04 19:50:30 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs N.Tyurina, V. Lipunov, E. Gorbovskoy, V.Kornilov, P.Balanutsa, A.Kuznetsov, D.Kuvshinov, Lomonosov Moscow State University, Sternberg Astronomical Institute D.Buckley, S. Potter, A.Kniazev South African Astronomical Observatory N.M.Budnev, O.Gres, K.Ivanov, S.Yazev, V.A.Poleshchuk Irkutsk State University A. Tlatov, V.Senik, D. Dormidontov, A.V. Parhomenko Kislovodsk Solar Station of the Pulkovo Observatory V.Yurkov, Yu.Sergienko, A.Gabovich Blagoveschensk Educational State University, Blagoveschensk H.Levato , C.Saffe Instituto de Ciencias Astronomicas, de la Tierra y del Espacio (ICATE) F. Podest, C. Mallamaci, C. Lopez , R.Podesta Observatorio Astronomico Felix Aguilar (OAFA) R. Rebolo, M. Serra Ricart, N. Lodieu, G. Israelian The Instituto de Astrofisica de Canarias MASTER-SAAO robotic telescope (MASTER-Net: http://observ.pereplet.ru) located in SAAO was pointed to the GRB160804A (Swift trigger= 707231 came only from (Marshall et al., GCN19761) at 2016-08-04 17:59:48 UT (16h27m01s after the trigger time). We have set of images with unfiltered m_lim=20.7 (540s exposure). We see the Swift/UVOT source (Breeveld et al., GCN 19764) at Ra Dec (2000)=14:46:31.14 +09:59:56.7 with unfiltered m_OT~ 20.3. There is a Sloan galaxy in 0.182" with green g=21.7, red r=21.2m, i.e. possible host galaxy for this GRB.