TITLE: GCN GRB OBSERVATION REPORT NUMBER: 2737 SUBJECT: GRB040924: MASTER Optical observations DATE: 04/09/24 18:06:17 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs V. Lipunov, A.Krylov, V.Kornilov, G.Borisov, D.Kuvshinov, A.Belinski, M.Kuznetsov, S.Potanin, G.Antipov, E.Gorbovskoy, N.Tyurina Sternberg Astronomical Institute, Alexsandr Krylov Observatory, Moscow At 5h 21m after HETE alert 3564 MASTER robotic telescope (http://observ.pereplet.ru) had imaging the corresponding area of the sky under the large zenit distance. The first image was started at 17h13m34s UT. Now we have 15 unfiltered images of the error box (45s exposition, 40 x 50 arcmin, 200 mm camera). Ther is no optical transient up to 17.5 m on all images and at position given Fox and Moon (GCN2734). Our unfiltred magnitude close to R filter. Sum FITS image are available at http://observ.pereplet.ru/images/GRB040924/ This message may be cited.