{
  "bibcode": "2021GCN.29385....1L",
  "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,\nD.Kuvshinov,  D. Cheryasov\n(Lomonosov Moscow State University, SAI, Physics Department),\n\nR. Podesta, C.Lopez, F. Podesta, C.Francile \n(Observatorio Astronomico Felix Aguilar OAFA),\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) started inspect of the Fermi GRB 210202A ( Fermi GBM team, GCN 29380) errorbox  10111 sec after notice time and 10140 sec after trigger time at 2021-02-02 22:59:31 UT, with upper limit up to  18.0 mag. The observations began at zenith distance = 71 deg. The sun  altitude  is -41.4 deg. \n\nThe galactic latitude b = 13 deg., longitude l = 333 deg.\n\n\nReal time updated cover map and OT discovered available here: \nhttps://master.sai.msu.ru/site/master2/observ.php?id=1538815\n\nWe obtain a following upper limits.  \n\nTmid-T0  |      Date Time      |          Site       |             Coord (J2000)          |Filt.| Expt. | Limit| Comment\n_________|_____________________|_____________________|____________________________________|_____|_______|_______|________\n\n   10170 | 2021-02-02 22:59:31 |         MASTER-SAAO | (15h 23m 17.00s , -42d 01m 04.8s) |   C |    60 | 17.7 |        \n   10420 | 2021-02-02 23:03:41 |         MASTER-SAAO | (15h 16m 27.32s , -40d 00m 25.3s) |   C |    60 | 18.0 |        \n   10505 | 2021-02-02 23:05:06 |         MASTER-SAAO | (15h 37m 27.39s , -40d 00m 36.0s) |   C |    60 | 17.4 |        \n   10585 | 2021-02-02 23:06:26 |         MASTER-SAAO | (15h 31m 36.94s , -38d 01m 28.8s) |   C |    60 | 17.7 |        \nFilter C is a clear (unfiltred) band. \n\n\nThe observation and reduction will continue. \nThe message may be cited.",
  "circularId": 29385,
  "createdOn": 1612323015000,
  "email": "lipunov@xray.sai.msu.ru",
  "subject": "Fermi GRB 210202A: Global MASTER-Net observations report",
  "submitter": "Vladimir Lipunov at Moscow State U/Krylov Obs  <lipunov@xray.sai.msu.ru>",
  "eventId": "GRB 210202A"
}