TITLE: GCN CIRCULAR NUMBER: 38137 SUBJECT: EP241107A: MASTER optical observations of xray transient DATE: 24/11/08 21:06:14 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru> M.Gulyaev, V.Lipunov, E.Gorbovskoy, D.Vlasenko, I.Panchenko, A.Kuznetsov, P.Balanutsa, G.Antipov, A.Yudin, K.Zhirkov, N.Tiurina, A.Sankovich, Ya.Kechin, V.Senik, A.Chasovnikov, V.Topolev, K.Vetrov (Lomonosov MSU), A. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory), A.Sosnovskij (CrAO RAS), O.Gress, N.Budnev(ISU), D.Buckley (SAAO), R.Rebolo (The Instituto de Astrofisica de Canarias), C.Francile, F. Podesta, R.Podesta, E. Gonzalez (Observatorio Astronomico Felix Aguilar (OAFA), A.Gabovich, V.Yurkov (Blagoveschensk Educational StateUniversity) L.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez, A.R.Corella, L.H.Rodriguez (INAOE, Guillermo Haro Astrophysics Observatory), MASTER Global robotic net (http://observ.pereplet.ru Lipunov et al.,2010,Advances in Astronomy,2010,30L) started observation of EP241107A (EP-WXT Zhou et al., GCN 38112, Ttrigger=14:10:23 UT) at MASTER-Kislovodsk (covermap at https://master.sai.msu.ru/site/master2/event.php?id=2661310 , Lipunov et al. GCN 38117 ) at 15:23:24UT (See table with unfiltered mlim ) There is optical source (afterglow) MASTER OT J022002.50+032001.8 with unfiltered mOT=~19.0 at 540s summary image (9*60s) in interval 15:23:24-16:07:41UT and mOT=19.2 at interval 2024-11-07 17:50:16+2340s (mlim=20.5) at position of optical source, discovered by AKO (Odeh et al. GCN 38115, T=15:53:50 Ic=17.85) and observed by SVOM Kang et al, GCN 38116; GIT Mohan et al. GCN 38118; NAOC Li et al. GCN 39127, FTW, Busman et al. GCN 38120, OHP, Adami et al. GCN 38122, GEMINI, Quirola-Vasquez et al. GCN 38126, LOT/Kinder, Kong et al. GCN 38131, KAIT Zheng et al. GCN 38136) This OT is the most probably GRB afterglow by light curve features and by energy release. Reduction will be continued. View this GCN Circular online at https://gcn.nasa.gov/circulars/38137. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...