{
  "bibcode": "2019GCN.24707....1L",
  "body": "V. Lipunov, V.Kornilov, E.Gorbovskoy, N.Tiurina, A.Kuznetsov, I.Gorbunov, \nV.Vladimirov, P.Balanutsa, D.Vlasenko, D.Zimnukhov, F.Balakin,A. Chasovnikov,\nV.Topolev, V.Senik, D.Kuvshinov(Lomonosov Moscow State University, SAI, Physics Department),\n\nD. Buckley (South African Astronomical Observatory),\n\nR. Podesta, C. Lopez, C.Francile, F. Podesta (Observatorio Astronomico Felix Aguilar OAFA, San Juan National University),\n\nH.Levato (Instituto de Ciencias Astronomicas, de la Tierra y del Espacio ICATE, SJNU)\n\nR. Rebolo, M. Serra, N. Lodieu, G. Israelian, L. Suarez-Andres (The Instituto de Astrofisica de Canarias),\n\nO. Gress, N.M. Budnev, O.Ershova, S.Yazev (Applied Physics Institute, Irkutsk State University),\n\nV. Yurkov, A. Gabovich, Yu. Sergienko, D. Kobcev (Blagoveschensk Educational State University),\n\nA. Tlatov, D.Dormidontov, A.V. Parhomenko (Kislovodsk Solar  Station of the Pulkovo Observatory),\n\nMASTER Global Robotic Net (Lipunov et al., 2010, Advances in Astronomy,vol.2010, 30L  (http://observ.pereplet.ru)\nobserved Fermi GRB 190531B\n(Ttrig=2019-05-31 20:10:12UT, GBM team GCN24695, Veres et al. GCN 24705;\nBALROG localization RA,Dec(2000) = 27.9(+/-0.8d) -40.8(+/-0.6) Kunzweiler et al. GCN 24696, GCN 24699,\nLAT localization RA,Dec= 24.37, -41.97 +-0.11d(90%)  Axelsson et al. GCN24701,\nSwift XRT afterglow 01h 37m 11.09s -41d 57' 30.3\"  +-1.6 arcsec(90%) D'Avanzo et al. GCN24706, Evans et al. 24702 )\n\nAt alert time\nMASTER-SAAO:   Error-Box_altitude=-15d, Sun_alt=-57d.\nMASTER-OAFA:   Error-Box_altitude=+15d, Sun_alt=+15d\n\nMASTER-SAAO robotic telescope (located in South African Astronomical Observatory)\nwas pointed to the  GRB190531A 4934 sec after notice time and 20321 sec \nafter trigger time at 2019-06-01 01:48:53 UT .\nError-box_alt=21deg, sun_alt=-47deg.\nThere is no OT at Swift XRT position with unfiltered mlim=20.6m\n\nMASTER-OAFA robotic telescope (located in Argentina)\nwas pointed to the  GRB190531A at 2019-06-01 08:55:19UT\nError-box_alt=34deg, sun_alt=-32deg.\nThere is no OT at Swift XRT position with unfiltered mlim=20.0m\n\n\nReduction will be continued.\nThe message may be cited.",
  "circularId": 24707,
  "createdOn": 1559383601000,
  "email": "lipunov@xray.sai.msu.ru",
  "subject": "GRB 190531B: MASTER optical observation",
  "submitter": "Vladimir Lipunov at Moscow State U/Krylov Obs  <lipunov@xray.sai.msu.ru>",
  "eventId": "GRB 190531B"
}