{
  "bibcode": "2019GCN.23949....1G",
  "body": "E. Gorbovskoy, V. Lipunov, E. Gorbovskoy, N.Tyurina, V.Kornilov, \nD.Vlasenko, V.Vladimirov,  D.Zimnukhov,\nA.Kuznetsov, P.Balanutsa, A. Chasovnikov, D.Kuvshinov (Lomonosov Moscow State \nUniversity, SAI, Physics Department),\n\nO. Gress, N.M. Budnev, O.Ershova, Yu.Ishmuhametova (Applied Physics Institute, \nIrkutsk State University),\n\nV. Yurkov, A. Gabovich, Yu. Sergienko, D. Kobcev (Blagoveschensk Educational \nState University),\n\nR. Rebolo, M. Serra, N. Lodieu, G. Israelian, L. Suarez-Andres (The Instituto \nde Astrofisica de Canarias),\n\nD. Buckley (South African Astronomical Observatory),\n\nA. Tlatov, V.Senik, A.V. Parhomenko, D. Dormidontov (Kislovodsk Solar Station \nof the Pulkovo Observatory),\n\nR. Podesta, C. Lopez, C.Francile, F. Podesta (Observatorio Astronomico Felix \nAguilar OAFA),\n\nH.Levato (Instituto de Ciencias Astronomicas, de la Tierra y del Espacio ICATE)\n\nMASTER-Tunka robotic telescope (Global MASTER-Net: \nhttp://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, \nvol. 2010, 30L) located in Russia (Applied Physics Institute, Irkutsk \nState University) was pointed to the  GRB190311.6 (Troja et al., \n23946) 55 sec after notice time \nand 66 sec after trigger time at 2019-03-11 14:24:45 UT. On our third (30 \ns  exposure)  set we  found optical transient  within SWIFT \nerror-box at Swift UVOT position (Troja et al., 23946).\n\nm ~ 17.5\nRA, DEC = 14:08:15.72, +53:30:02.9\nerr = 1 arcsec\n\nWe obtain a following images with OT:\n\nTmid-T0  |          Site       |Filt.| Expt. | Limit | Comment\n_________|_____________________|_____|_______|_______|________\n\n      109 |        MASTER-Tunka |  P- |    10 | 16.82 |\n      109 |        MASTER-Tunka |  P- |    80 | 18.47 |  Coadd\n      109 |        MASTER-Tunka |  P| |    10 | 16.69 |\n      109 |        MASTER-Tunka |  P| |    80 | 18.33 |  Coadd\n      231 |        MASTER-Tunka |  P| |    30 | 17.60 |\n      231 |        MASTER-Tunka |  P- |    30 | 17.74 |\n      338 |        MASTER-Tunka |  P| |    40 | 17.70 |\n      338 |        MASTER-Tunka |  P- |    40 | 17.87 |\n      462 |         MASTER-Amur |  P/ |    60 | 13.12 |\n      465 |        MASTER-Tunka |  P| |    60 | 18.12 |\n      465 |        MASTER-Tunka |  P| |   250 | 19.14 |  Coadd\n      465 |        MASTER-Tunka |  P- |    60 | 18.21 |\n      465 |        MASTER-Tunka |  P- |   250 | 19.24 |  Coadd\n      593 |         MASTER-Amur |  P/ |    60 | 12.20 |\n      614 |        MASTER-Tunka |  P| |    80 | 18.50 |\n      614 |        MASTER-Tunka |  P- |    80 | 18.43 |\n      808 |        MASTER-Tunka |  P| |   110 | 18.65 |\n      808 |        MASTER-Tunka |  P- |   110 | 18.65 |\n     1032 |        MASTER-Tunka |  P| |   140 | 18.56 |\n     1032 |        MASTER-Tunka |  P| |   490 | 19.35 |  Coadd\n     1032 |        MASTER-Tunka |  P- |   140 | 18.55 |\n     1032 |        MASTER-Tunka |  P- |   490 | 19.30 |  Coadd\n     1305 |        MASTER-Tunka |  P| |   170 | 18.64 |\n     1305 |        MASTER-Tunka |  P- |   170 | 18.63 |\n     1622 |        MASTER-Tunka |  P| |   180 | 19.02 |\n     1623 |        MASTER-Tunka |  P- |   180 | 18.89 |\n     1949 |        MASTER-Tunka |  P| |   180 | 17.67 |\n     1949 |        MASTER-Tunka |  P| |   540 | 19.26 |  Coadd\n     1949 |        MASTER-Tunka |  P- |   180 | 17.63 |\n     1949 |        MASTER-Tunka |  P- |   540 | 19.22 |  Coadd\n     2284 |        MASTER-Tunka |  P| |   180 | 18.90 |\n     2284 |        MASTER-Tunka |  P- |   180 | 18.98 |\n     2616 |        MASTER-Tunka |  P| |   180 | 19.01 |\n     2949 |        MASTER-Tunka |  P| |   180 | 19.10 |\n     2949 |        MASTER-Tunka |  P| |   540 | 19.83 |  Coadd\n     2949 |        MASTER-Tunka |  P- |   540 | 19.72 |  Coadd\n     3959 |        MASTER-Tunka |  P- |   540 | 19.60 |  Coadd\n     3959 |        MASTER-Tunka |  P| |   540 | 19.87 |  Coadd\n     5650 |        MASTER-Tunka |  P| |   180 | 19.20 |\n     5650 |        MASTER-Tunka |  P- |   180 | 18.89 |\n     5979 |        MASTER-Tunka |  P- |   180 | 18.74 |\n     5979 |        MASTER-Tunka |  P| |   180 | 19.02 |\n     6312 |        MASTER-Tunka |  P| |   180 | 18.66 |\n     6312 |        MASTER-Tunka |  P- |   180 | 18.79 |\n\n\nThe 5-sigma upper limit has been about 16.32mag\nThe message may be cited.\n\n\n====================================================================\n\n\nThe galactic latitude b = 60 deg., longitude l = 99 deg.\nThe observations made on zenit distance = 48 deg.The moon (22 % bright \npart) is 14 deg. above the horizon. The distance between  moon and  object \nis 113\nThe sun  altitude  is -30.2 deg.\nThe object can be observed till sunrise at 2019-03-12 23:26:58.\n\n\nThis message can be cited.",
  "circularId": 23949,
  "createdOn": 1552321137000,
  "email": "lipunov@xray.sai.msu.ru",
  "subject": "GRB190311A: MASTER Global Robotic Net OT optical observation",
  "submitter": "Vladimir Lipunov at Moscow State U/Krylov Obs  <lipunov@xray.sai.msu.ru>",
  "eventId": "GRB 190311A"
}