{
  "createdOn": 1724627011607,
  "submittedHow": "email-legacy",
  "bibcode": "2024GCN.37289....1L",
  "eventId": "GRB 240825A",
  "circularId": 37289,
  "subject": "GRB 240825A: MASTER optical counterpart observation",
  "submitter": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
  "body": "V.Lipunov (MSU), D.Buckley (SAAO),\nK.Zhirkov, I.Gorbunov, P.Balanutsa, G.Antipov, A.Kuznetsov, N.Tiurina,\nE.Gorbovskoy, D.Vlasenko, Ya.Kechin, Yu.Tselik, V..Senik (Lomonosov MSU,SAI,PhysicsDepartment),\nO.Gress, N.Budnev(ISU),\nA.Sosnovskij (Crimean Astrophysical Observatory, RAS),\nC.Francile.  F. Podesta, R.Podesta (Observatorio Astronomico Felix AguilarOAFA),\nR. Rebolo, M. Serra(The Instituto de Astrofisica de Canarias),\nA. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory),\nA. Gabovich, V.Yurkov (Blagoveschensk Educational StateUniversity)\n\nMASTER Global robotic net (http://observ.pereplet.ru Lipunov et al.,2010,Advances in Astronomy,2010,30L)\nstarted observation (Lipunov et al. GCN 37279)  of Swift GRB240825A\n(R.Gupta et al. GCN 37274) in MASTER-SAAO and MASTER-Tavrida (rain in MASTER-Amur, -Tunka and -Kislovodsk).\n\nThe optical transient, discovered by Swift and also observed by\nNanshan HMT / Jiang et al., GCN #37275; Skynet / Dutton et al., GCN #37276; AKO / Odeh  et al., GCN #37277,\nMephisto / Zhang et al. GCN 37278, GMG / Li et al., GCN #37280)\nwas detected at MASTER-SAAO images started 2024-08-25 18:05:12 with unfiltered m_OT=20.1 (mlim=21.0).\nThere are several SDSS objects inside 3\" from Swift-UVOT position in VIZIER database,\nthe closest is SDSS galaxy (also visible in Pan-STARRs images)  in 0.07\" with rmag=23.095 https://skyserver.sdss.org/dr9/en/tools/quicklook/quickobj.asp?id=1237663785264350187 .\n\nObservations and reduction will be continued.\n\n"
}