{
  "subject": "Swift GRB190821.72 Global MASTER-Net observations report",
  "eventId": "GRB 190821.72",
  "bibcode": "2019GCN.25429....1L",
  "createdOn": 1566410119000,
  "circularId": 25429,
  "submitter": "Vladimir Lipunov at Moscow State U/Krylov Obs  <lipunov@xray.sai.msu.ru>",
  "email": "lipunov@xray.sai.msu.ru",
  "body": "V. Lipunov, E. Gorbovskoy, V.Kornilov, N.Tyurina, P.Balanutsa, A.Kuznetsov, F.Balakin, \nV.Vladimirov, D. Vlasenko, I.Gorbunov, D.Zimnukhov, V.Senik, T.Pogrosheva, D.Kuvshinov \n(Lomonosov Moscow State University, SAI, Physics Department),\n\nR. Podesta, C.Lopez, F. Podesta, C.Francile \n(Observatorio Astronomico Felix Aguilar OAFA),\n\nH.Levato \n(Instituto de Ciencias Astronomicas, de la Tierra y del Espacio ICATE),\n\nR. Rebolo, M. Serra \n(The Instituto de Astrofisica de Canarias),\n\nD. Buckley \n(South African Astronomical Observatory),\n\nO.A. Gres, N.M. Budnev, O.Ershova \n(Irkutsk State University, API),\n\nA. Tlatov, D. Dormidontov \n(Kislovodsk Solar Station of the Pulkovo Observatory),\n\nV. Yurkov, A. Gabovich, Yu. Sergienko \n(Blagoveschensk Educational State University)\n\n\n\n\nMASTER-SAAO robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in South Africa (South African Astronomical Observatory) was pointed to the Swift GRB190821.72 (trigger No 921722, 16h 40m 18.48s , -34d  1m 19.20s, R=0.05) errorbox  8 sec after notice time and 41 sec after trigger time at 2019-08-21 17:10:44 UT, with upper limit up to  18.4 mag. Observations started at twilight.  The observations began at zenit distance =  3 deg. The sun  altitude  is -12.4 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=1111516\n\nWe obtain a following upper limits.  \n\nTmid-T0  |          Site       |Filt.| Expt. | Limit| Comment\n_________|_____________________|_____|_______|______|________\n\n      46 |         MASTER-SAAO |  P\\ |    10 | 16.3 |        \n      73 |         MASTER-SAAO |  P\\ |    10 | 16.4 |        \n      98 |         MASTER-SAAO |  P\\ |    60 | 17.3 |  Coadd \n     104 |         MASTER-SAAO |  P\\ |    20 | 16.9 |        \n     145 |         MASTER-SAAO |  P\\ |    30 | 17.0 |        \n     195 |         MASTER-SAAO |  P\\ |    40 | 17.3 |        \n     250 |         MASTER-SAAO |  P\\ |   150 | 17.9 |  Coadd \n     256 |         MASTER-SAAO |  P\\ |    50 | 17.4 |        \n     328 |         MASTER-SAAO |  P\\ |    60 | 17.6 |        \n     508 |         MASTER-SAAO |  P\\ |   270 | 18.1 |  Coadd \n     941 |         MASTER-SAAO |  P\\ |   490 | 18.4 |  Coadd \n\n\nThe observation and reduction will continue. \nThe message may be cited."
}