{
  "bibcode": "2019GCN.23804....1L",
  "body": "V. Lipunov, E. Gorbovskoy, N.Tyurina, V.Kornilov, P.Balanutsa, D.Vlasenko, V.Vladimirov, A.Kuznetsov, P.Balanutsa, A. \nChasovnikov, D.Kuvshinov (Lomonosov Moscow State University, SAI, Physics Department),\n\nR. Rebolo, M. Serra, N. Lodieu, G. Israelian, L. Suarez-Andres\n(The Instituto de Astrofisica de Canarias),\n\nD. Buckley (South African Astronomical Observatory),\n\nV. Yurkov, A. Gabovich, Yu. Sergienko, D. Kobcev (Blagoveschensk Educational State University, Blagoveschensk),\n\nA. Tlatov, V.Senik, A.V. Parhomenko, D. Dormidontov (Kislovodsk Solar \nStation of the Pulkovo Observatory),\n\nO. Gres, N.M. Budnev, O.Ershova, Yu.Ishmuhametov (Applied Physics \nInstitute, Irkutsk State University),\n\nR. Podesta, C. Lopez, C.Francile, F. Podesta (Observatorio Astronomico Felix Aguilar OAFA),\n\nH.Levato (Instituto de Ciencias Astronomicas, de la Tierra y del Espacio ICATE)\n\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  African Astronomical Observatory,\nwas pointed to Swift Trigger 886157  (S. D. Barthelmy et al., GCN 23800; Barthelmy et al. ATel 12436; Ttrig=2019-01-28 01:22:25 UT) \n23 sec after notice time (370 sec after trigger time) at 2019-01-28 01:28:35 UT.\n\nThere is no new OT, connected with GRB, with mlim=19.4 (5-sigma upper \nlimit) on first 70s-exposition image inside Swift BAT error-box.\n\nThere is no OT inside Swift XRT position (Kennea et al. ATel 12445)\non first MASTER images  (started at 2019-01-28 01:28:35) with mlim=19.4 \nand\nat 2019-01-29 01:44:03UT on 2 MASTER-SAAO inspect images with unfiltered mlim=20.0 (5-sigma).\n\nThe galactic latitude b = -2 deg., longitude l = 352 deg.\nAlert observations started at zenit distance = 72 deg.\nThe moon (48 % bright part) was 41 deg. above the horizon. The distance between  moon and  object is 47 deg.\nThe sun  altitude was -25.6 deg.\n\nThe message may be cited.",
  "circularId": 23804,
  "createdOn": 1548757165000,
  "email": "lipunov@xray.sai.msu.ru",
  "subject": "Swift Trigger 886157: MASTER optical observation",
  "submitter": "Vladimir Lipunov at Moscow State U/Krylov Obs  <lipunov@xray.sai.msu.ru>"
}