{
  "bibcode": "2020GCN.28718....1L",
  "body": "V. Lipunov, V.Kornilov, E.Gorbovskoy, N.Tiurina, P.Balanutsa, A.Kuznetsov, K.Zhirkov, F.Balakin,\nV.Vladimirov, D. Vlasenko, I.Gorbunov, D.Zimnukhov, V.Senik, A.Chasovnikov, \nA.Pozdnyakov, D.Cheryasov(Lomonosov Moscow State University, SAI, Physics Department),\nR. Podesta, C.Lopez, F. Podesta, C.Francile (Observatorio Astronomico FelixAguilar OAFA),\nR. Rebolo, M. Serra(The Instituto de Astrofisica de Canarias),\nD. Buckley (South African Astronomical Observatory),\nO.A. Gres, N.M. Budnev (Irkutsk State University, API),\nA. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory),\nA. Gabovich, V.Yurkov, Yu. Sergienko (Blagoveschensk Educational State University)\n\nMASTER-Tavrida wide field robotic-telescope (Lipunov et al. GCN 28704) and \nvery wide field cameras observed in alert mode Fermi GRB201020B\n(GBM GCN 28703, LAT GCN 28716\nhttps://gcn.gsfc.nasa.gov/other/201020B.gcn3 )\n\nMASTER auto-detection system (Lipunov et al. 2010, Advances in Astronomy, vol. 2010, 30L)\ndiscovered  MASTER OT J050152.74+770406.3\nwith afterglow light curve at\n(RA, Dec2000) = 05h 01m 52.74s +77d 04m 06.3s\n\nwith m_OT=13.7 at 2020-10-20.73413 UT.\n\nThe OT is seen in 35 images with afterglow behaviour.\n\nWe have reference image on 2020-01-02.78682 UT with unfiltered mlim=19.5m.",
  "circularId": 28718,
  "createdOn": 1603282773000,
  "email": "lipunov@xray.sai.msu.ru",
  "subject": "GRB 201020B: MASTER bright optical afterglow detection",
  "submitter": "Vladimir Lipunov at Moscow State U/Krylov Obs  <lipunov@xray.sai.msu.ru>",
  "eventId": "GRB 201020B"
}