{
  "bibcode": "2021GCN.30166....1L",
  "body": "V. Lipunov, K.Zhirkov, V.Kornilov, E.Gorbovskoy, I.Gorbunov,P.Balanutsa,V.Vladimirov,A.Kuznetsov,\nD. Vlasenko, N.Tiurina, D.Zimnukhov, V.Senik, V.Topolev, A.Chasovnikov, D.Cheryasov (Lomonosov MSU,SAI,PhysicsDepartment),\nD. Buckley (South African Astronomical Observatory),\nO.A. Gres, N.M. Budnev (Irkutsk State University, API),\nR. Podesta, C.Lopez, F. Podesta, C.Francile (Observatorio Astronomico FelixAguilar OAFA),\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 (MASTER-Net:http://observ.pereplet.ru Lipunov et al.,2010,Advances in Astronomy,2010,30L)\nstarted Swift GRB 210610A (Page et al. GCN 30160) error box observation \nat 2021-06-10 16:23:35UT at MASTER-SAAO.\n\nThere is MASTER OT J133707.60+142755.0 with m_OT~20.1m (unfiltered), that was \ndiscovered by Swift-UVOT (Page et al. 30160) and confirmed by\nHosokawa et al. GCN 30161, Xu et al. GCN 30162, Kumar et al. GCN 30163, \nand with redshift z=3.54 detected by Zhu et al. GCN 30164.\n\nObservation and reduction will be continued.",
  "circularId": 30166,
  "createdOn": 1623350870000,
  "email": "lipunov@xray.sai.msu.ru",
  "subject": "Swift GRB 210610A: MASTER optical counterpart observation",
  "submitter": "Vladimir Lipunov at Moscow State U/Krylov Obs  <lipunov@xray.sai.msu.ru>",
  "eventId": "GRB 210610A"
}