{
  "bibcode": "2019GCN.24263....1L",
  "body": "V. Lipunov, E. Gorbovskoy, V.Kornilov, D.Kuvshinov, N.Tyurina, P.Balanutsa,\nA.Kuznetsov, V.V.Chazov, D. Vlasenko\nLomonosov Moscow State University,\nSternberg Astronomical Institute, Moscow State University\n\nA. Tlatov, V.Senik, A.V. Parhomenko, D. Dormidontov\nKislovodsk Solar Station of the Pulkovo Observatory\n\nK. Ivanov, O. Gres, N.M. Budnev, S. Yazev, O. Chuvalaev, V. Poleshchuk\nIrkutsk State University\n\nV. Yurkov, A. Gabovich, Yu. Sergienko\nBlagoveschensk Educational State University, Blagoveschensk\n\nR. Podesta, Carlos Lopez and F. Podesta\nObservatorio Astronomico Felix Aguilar (OAFA)\n\nHugo Levato and Carlos Saffe\nInstituto de Ciencias Astronomicas, de la Tierra y del Espacio (ICATE)\n\nR. Rebolo, M. Serra, N. Lodieu, G. Israelian, L. Suarez-Andres\nThe Instituto de Astrofisica de Canarias\n\nD. Buckley, S. Potter, A. Kniazev, M. Kotze\nSouth African Astronomical Observatory\n\n\n\nMASTER-IAC robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in Spain (IAC Teide Observatory) was pointed to the Swift GRB190427.19 ( 18h 40m 51.12s , +40d 19m 19.20s, R=0.05) errorbox  40 sec after trigger time at 2019-04-27 04:34:54 UT, with upper limit up to  18.6 mag. The observations began at zenit distance = 16 deg. The sun  altitude  is -23.5 deg. \n\nMASTER-SAAO robotic telescope  located in South Africa (South African Astronomical Observatory) was pointed to the Swift GRB190427.19 errorbox  44 sec after trigger time at 2019-04-27 04:34:58 UT, with upper limit up to  13.2 mag. Observations started at twilight.  The observations began at zenit distance = 75 deg. The sun  altitude  is -7.5 deg. \n\nThe galactic latitude b = -60 deg., longitude l = 98 deg.\n\n\nReal time updated cover map and OT discovered available here: \nhttps://master.sai.msu.ru/site/master2/observ.php?id=1004408\n\nWe obtain a following upper limits.  \n\nTmid-T0  |          Site       |Filt.| Expt. | Limit| Comment\n_________|_____________________|_____|_______|______|________\n\n      45 |          MASTER-IAC |  P- |    10 | 16.8 |        \n      45 |          MASTER-IAC |  P| |    10 | 17.1 |        \n      50 |         MASTER-SAAO |  P\\ |    10 | 13.3 |        \n      77 |         MASTER-SAAO |  P\\ |    10 | 13.2 |        \n     100 |          MASTER-IAC |  P- |    20 | 17.4 |        \n     100 |          MASTER-IAC |  P| |    20 | 17.6 |        \n     108 |         MASTER-SAAO |  P\\ |    20 | 13.1 |        \n     160 |          MASTER-IAC |  P- |    30 | 17.7 |        \n     160 |          MASTER-IAC |  P| |    30 | 17.9 |        \n     212 |          MASTER-IAC |  P- |    40 | 17.9 |        \n     212 |          MASTER-IAC |  P| |    40 | 18.2 |        \n     274 |          MASTER-IAC |  P- |    50 | 18.1 |        \n     274 |          MASTER-IAC |  P| |    50 | 18.3 |        \n     346 |          MASTER-IAC |  P- |    60 | 18.3 |        \n     346 |          MASTER-IAC |  P| |    60 | 18.6 |        \n\n\nThe observation and reduction will continue. \nThe message may be cited.",
  "circularId": 24263,
  "createdOn": 1556343086000,
  "email": "lipunov@xray.sai.msu.ru",
  "subject": "Swift GRB190427.19 Global MASTER-Net observations report",
  "submitter": "Vladimir Lipunov at Moscow State U/Krylov Obs  <lipunov@xray.sai.msu.ru>",
  "eventId": "GRB 190427.19"
}