{
  "bibcode": "2019GCN.23855....1L",
  "body": "V. Lipunov, E. Gorbovskoy, N.Tyurina, V.Kornilov, D.Vlasenko, V.Vladimirov, \nD.Zimnukhov, A.Kuznetsov, P.Balanutsa, A. Chasovnikov, D.Kuvshinov (Lomonosov Moscow State University, SAI, Physics Department),\n\nR. Rebolo, M. Serra, N. Lodieu, G. Israelian, L. Suarez-Andres (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),\n\nA. Tlatov, V.Senik, A.V. Parhomenko, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory),\n\nO. Gress, N.M. Budnev, O.Ershova, Yu.Ishmuhametova (Applied Physics Institute, 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\nMASTER-SAAO robotic telescope (Global MASTER-Net http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, v.2010, 30L),\nlocated in South African Astronomical Observatory,\ninspected Swift Trigger 887541  error-box (Barthelmy  et al. GCN23849, 21:18:17 UT; XRT_RA,Dec= 262.2442, -36.2421 +-4.7arcsec)\nsince  2019-02-04 00:16:44UT (Lipunov et al. GCN 23851).\n\nThere is no OT connected with GRB, inside Swift-XRT error-box with the\nfollowing unfiltered (W=0.2B+0.8R by USNO-B1 field stars, MASTER FOV=4sq.deg.)\nupper limits (5sigma):\n\nTstart                Exp,s mlim \n2019-02-04 00:16:44   1800  20.0\n2019-02-04 00:16:44    540  18.6\n2019-02-04 00:16:44    180  17.5\n2019-02-04 00:35:06    180  18.4\n2019-02-04 00:38:43    180  18.4\n2019-02-04 01:04:45    540  19.7\n2019-02-04 01:15:31    540  19.9\n2019-02-04 01:30:35   1800  20.0\n2019-02-04 02:23:41    540  19.8 \n2019-02-04 02:48:42    540  19.8\n\nThe observations started when error-box altitude was 9 deg.\nThe sun altitude was -38deg.\nThe message may be cited.",
  "circularId": 23855,
  "createdOn": 1549269114000,
  "email": "lipunov@xray.sai.msu.ru",
  "subject": "Swift Trigger 887541: MASTER inspect",
  "submitter": "Vladimir Lipunov at Moscow State U/Krylov Obs  <lipunov@xray.sai.msu.ru>"
}