{
  "bibcode": "2022GCN.31880....1L",
  "body": "V. Lipunov, V.Kornilov, E.Gorbovskoy, K.Zhirkov, N.Tyurina, P.Balanutsa, A.Kuznetsov, D. Vlasenko, \nG.Antipov, D.Zimnukhov, V.Senik, E.Minkina, A.Chasovnikov, V.Topolev, D.Kuvshinov,  D.Cheryasov, Ya.Kechin\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\n(Irkutsk State University, API),\n\nL.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez, A.R.Corella, L.H.Rodriguez \n(INAOE, Guillermo Haro Astrophysics Observatory),\n\nA. Tlatov, D. Dormidontov \n(Kislovodsk Solar Station of the Pulkovo Observatory),\n\nA. Gabovich, V.Yurkov \n(Blagoveschensk Educational State University)\n\n\nMASTER-OAGH robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in Mexico (OAGH National Institute for Astrophysics, Optics and Electronics) was pointed to the Swift GRB220412.28 (trigger No 1102281,08h 15m 52.32s , +30d 19m 19.2s, R=0.05) errorbox  37 sec after notice time and 97 sec after trigger time at 2022-04-12 06:38:27 UT, with upper limit up to  14.9 mag. The observations began at zenith distance = 56 deg. The sun  altitude  is -49.2 deg. \n\nThe galactic latitude b = 31 deg., longitude l = 192 deg.\n\n\nReal time updated cover map and OT discovered available here: \nhttps://master.sai.msu.ru/site/master2/observ.php?id=1940522\n\nWe obtain a following upper limits.  \n\nTmid-T0  |          Site       |Filt.| Expt. | Limit| Comment\n_________|_____________________|_____|_______|______|________\n\n     108 |         MASTER-OAGH |  P- |    20 | 14.8 |        \n     155 |         MASTER-OAGH |  P- |    30 | 14.9 |        \n     211 |         MASTER-OAGH |  P- |    40 | 14.9 |        \n\n\nThe observation and reduction will continue. \nThe message may be cited.",
  "circularId": 31880,
  "createdOn": 1649745870000,
  "email": "lipunov@xray.sai.msu.ru",
  "subject": "Swift GRB220412.28: Global MASTER-Net observations report",
  "submitter": "Vladimir Lipunov at Moscow State U/Krylov Obs  <lipunov@xray.sai.msu.ru>",
  "eventId": "GRB 220412.28"
}