{
  "bibcode": "2019GCN.24895....1L",
  "body": "V. Lipunov, F.Balakin, E. Gorbovskoy, V.Kornilov, N.Tyurina, P.Balanutsa, \nA.Kuznetsov, F.Balakin, V.Vladimirov, D. Vlasenko, I.Gorbunov,D.Zimnukhov, V.Senik, D.Kuvshinov \n(Lomonosov Moscow State University, SAI, Physics Department),\n\nR. Podesta, C.Lopez, F. Podesta, C.Francile (Observatorio Astronomico Felix Aguilar OAFA),\n\nH.Levato (Instituto de Ciencias Astronomicas, de la Tierra y del Espacio ICATE),\n\nR. Rebolo, M. Serra (The Instituto de Astrofisica de Canarias)\n\nD. Buckley (South African Astronomical Observatory),\n\nO.A. Gres, N.M. Budnev, O.Ershova (Irkutsk State University, API),\n\nA. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory),\n\nV. Yurkov, A. Gabovich, Yu. Sergienko (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)\nlocated in South Africa (South African Astronomical Observatory)\nstarted inspect of Swift GRB 190627A error-box (Sonbas  et al. GCN 24888, trigger 911609, 11:18:31UT, BAT 16h 19m 19.20s , - 5d 17m 31.20s, R=0.05)\n  19594 sec after trigger time at 2019-06-27 16:45:05 UT, with upper limit up to  19.4 mag.\n\nMASTER auto-detection system detected optical counterpart\nwith unfiltered m_OT~18.2 (W=0.2B+0.8R calibrated by USNO-B1 R2,B2)\n(OT was discovered by Swift GCN 24888, and also publishied in GCN 24889, GCN 24892, GCN 24893, GCN24894)\n\nObservations started at twilight after sunset.\nObservations began at alt. = 30 deg., the sun  altitude  was -12.8 deg.\nThe galactic latitude b = -60 deg., longitude l = 98 deg.\n\nThe observation and reduction will continue.\nThe message may be cited.",
  "circularId": 24895,
  "createdOn": 1561712695000,
  "email": "lipunov@xray.sai.msu.ru",
  "subject": "GRB 190627A: MASTER optical counterpart observation",
  "submitter": "Vladimir Lipunov at Moscow State U/Krylov Obs  <lipunov@xray.sai.msu.ru>",
  "eventId": "GRB 190627A"
}