TITLE: GCN GRB OBSERVATION REPORT NUMBER: 2569 SUBJECT: MASTER: HETE Alert 3163, 3167 technical optical observation DATE: 04/04/15 01:51:55 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs V. Lipunov, A.Krylov, V.Kornilov, G.Borisov, D.Kuvshinov, A.Belinski, I.Chilingarian, M.Kuznetsov, S.Potanin, G.Antipov, N.Tiurina Sternberg Astronomical Institute, Alexsandr Krylov Observatory, Moscow After alert HETE 3167 MASTER robotic telescope (http://observ.pereplet.ru) had automatically imaging the corresponding area of the sky (141 seconds after trigger time). We have 7 unfiltered images of the error box (30s exposition, 6 squere degrees field) up to 19 magnitude. After alert HETE 3168 MASTER robotic telescope (http://observ.pereplet.ru) had automatically imaging the corresponding area of the sky (85 seconds after trigger time). We have 7 unfiltered images of the error box (30s exposition, 6 squere degrees field) up to 19 magnitude. Reduced FITS images are available. These are technical results. This message may be cited.