{
  "submittedHow": "email",
  "body": "D. Buckley\n(South African Astronomical Observatory),\n\nV. Lipunov, V.Kornilov, E. Gorbovskoy, K. Zhirkov, N.Tyurina, P.Balanutsa, A.Kuznetsov, V.Senik,  D. Vlasenko,\nG.Antipov, D.Zimnukhov, E.Minkina, A.Chasovnikov, V.Topolev, D.Kuvshinov, D. Cheryasov, Ya.Kechin, Yu.Tselik, A. Sosnovskij\n(Lomonosov Moscow State University, SAI, Physics Department),\n\nR. Podesta, C.Lopez, F. Podesta, C.Francile\n(Observatorio Astronomico Felix Aguilar OAFA),\n\nR. Rebolo, M. Serra\n(The Instituto de Astrofisica de Canarias),\n\nO.A. Gress, N.M. Budnev, O.Ershova\n(Irkutsk State University, API),\n\nL.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez, A.R.Corella, L.H.Rodriguez\n(INAOE, Guillermo Haro Astrophysics Observatory),\n\nA. Tlatov, D. Dormidontov\n(Kislovodsk Solar Station of the Pulkovo Observatory),\n\nV. Yurkov, A. Gabovich\n(Blagoveschensk Educational State University)\n\nMASTER-SAAO robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in South Africa (South African Astronomical Observatory) was pointed to the  GRB250725.08 33 sec after notice time and 53 sec after trigger time at 2025-07-25 01:52:29 UT. On our first (10s exposure)  set we  found 1 optical transient within Swift error-box (ra=35.3833 dec=-82.7836 r=0.05) brighter than  16.0.\n\n\n T-Tmid      Date      Time       Expt.        Ra                Dec           Mag\n---------|---------------------|-------|-----------------|-----------------|-------\n      58   2025-07-25 01:52:29      10   (02h 21m 55.91s , -82d 47m 28.0s)     15.6\n\nThe 5-sigma upper limit has been about  16.0mag\nThe message may be cited.\n",
  "subject": "Swift GRB 250725A: Global MASTER-Net OT detection",
  "bibcode": "2025GCN.41151....1B",
  "submitter": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
  "circularId": 41151,
  "editedBy": "Judith Racusin at NASA/GSFC <judith.racusin@nasa.gov> on behalf of Vladimir Lipunov at Lomonosov Moscow State University <lipunov@sai.msu.ru>",
  "eventId": "GRB 250725A",
  "editedOn": 1753449793699,
  "version": 2,
  "createdOn": 1753409375356,
  "format": "text/plain"
}