{
  "bibcode": "2018GCN.23299....1L",
  "body": "V. Lipunov, E. Gorbovskoy, V.Kornilov, D.Kuvshinov, N.Tyurina, P.Balanutsa,A.Kuznetsov, V.V.Chazov, D. Vlasenko\nLomonosov Moscow State University, Sternberg Astronomical Institute\n\nR. Rebolo, M. Serra, N. Lodieu, G. Israelian, L. Suarez-Andres\nThe Instituto de Astrofisica de Canarias\n\nHugo Levato and Carlos Saffe\nInstituto de Ciencias Astronomicas, de la Tierra y del Espacio (ICATE)\n\nR. Rebolo, M. Serra, N. Lodieu, G. Israelian, L. Suarez-Andres\nThe Instituto de Astrofisica de Canarias\n\nD. Buckley,\nSouth African Astronomical Observatory\n\nA. Tlatov, V.Senik, A.V. Parhomenko, D. Dormidontov\nKislovodsk Solar Station of the Pulkovo Observatory\n\nO. Gres, N.M. Budnev, Yu.Ishmuhametova\nApplied Physics Institute of Irkutsk State University\n\nV. Yurkov, A. Gabovich, Yu. Sergienko\nBlagoveschensk Educational State University, Blagoveschensk\n\nMASTER-IAC robotic telescope  (MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)\nlocated in Spain (IAC Teide Observatory) was pointed to Swift GRB181003A (Beardmore et al. GCN 23295, Evans et al. GCN 23296)\n  4 sec after notice time and 59 sec after trigger time at 2018-10-03 05:12:02 UT, with \nupper limit up to  19.1 mag.\nThe observations started on zenit distance = 65 deg.\nThe sun  altitude  was -23.8 deg.\n\nMASTER-OAFA robotic telescope  located in Argentina (OAFA observatory of San Juan National University)\nwas pointed to the  GRB181003A\n10 sec after notice time and 64 sec after trigger time at 2018-10-03 05:12:08 UT, \nwith upper limit up to  20.3 mag.\nThe observations started on zenit distance = 27 deg.\nThe sun  altitude  was -53.3 deg.\n\nThe galactic latitude b = -60 deg., longitude l = 98 deg.\n\nWe obtained the following upper limits:\n\nTmid-T0  |  MASTER observatory |Filt.| Exp.,s| m_lim | Comment\n_________|_____________________|_____|_______|_______|________\n\n       89 |          MASTER-IAC |  P- |    10 | 16.29 |\n       89 |          MASTER-IAC |  P- |    50 | 17.38 |  Coadd\n       89 |          MASTER-IAC |  P- |   710 | 19.12 |  Coadd\n       96 |         MASTER-OAFA |   C |    10 | 16.88 |\n       96 |         MASTER-OAFA |   C |    70 | 18.69 |  Coadd\n       96 |         MASTER-OAFA |   C |   550 | 19.83 |  Coadd\n      131 |          MASTER-IAC |  P- |    20 | 16.75 |\n      176 |         MASTER-OAFA |   C |    20 | 17.54 |\n      185 |          MASTER-IAC |  P- |    20 | 16.75 |\n      242 |          MASTER-IAC |  P- |    30 | 17.31 |\n      242 |          MASTER-IAC |  P- |   120 | 17.94 |  Coadd\n      272 |         MASTER-OAFA |   C |    40 | 18.17 |\n      312 |          MASTER-IAC |  P- |    40 | 17.05 |\n      393 |         MASTER-OAFA |   C |    50 |  18.4 |\n      393 |         MASTER-OAFA |   C |   210 |  19.3 |  Coadd\n      399 |          MASTER-IAC |  P- |    50 | 17.53 |\n      500 |          MASTER-IAC |  P- |    70 | 17.66 |\n      500 |          MASTER-IAC |  P- |   250 | 18.41 |  Coadd\n      531 |         MASTER-OAFA |   C |    70 |  18.7 |\n      632 |          MASTER-IAC |  P- |    80 | 17.66 |\n      701 |         MASTER-OAFA |   C |    90 | 18.81 |\n      774 |          MASTER-IAC |  P- |   100 | 17.92 |\n      900 |         MASTER-OAFA |   C |   120 | 19.05 |\n      900 |         MASTER-OAFA |   C |   450 | 19.72 |  Coadd\n      951 |          MASTER-IAC |  P- |   130 | 17.92 |\n     1145 |         MASTER-OAFA |   C |   150 | 19.18 |\n     1170 |          MASTER-IAC |  P- |   160 | 17.92 |\n     1434 |         MASTER-OAFA |   C |   180 | 19.31 |\n     1434 |         MASTER-OAFA |   C |  1800 | 20.16 |  Coadd\n     1436 |          MASTER-IAC |  P- |   180 | 18.15 |\n     1436 |          MASTER-IAC |  P- |  1800 | 19.11 |  Coadd\n     1749 |          MASTER-IAC |  P- |   180 | 18.16 |\n     1749 |          MASTER-IAC |  P- |   540 |    19 |  Coadd\n     1764 |         MASTER-OAFA |   C |   180 | 19.26 |\n     1764 |         MASTER-OAFA |   C |   540 | 19.84 |  Coadd\n     2070 |          MASTER-IAC |  P- |   180 | 18.16 |\n     2097 |         MASTER-OAFA |   C |   180 | 19.27 |\n     2382 |          MASTER-IAC |  P- |   180 | 18.16 |\n     2429 |         MASTER-OAFA |   C |   180 |  19.3 |\n     2709 |          MASTER-IAC |  P- |   180 | 18.14 |\n     2709 |          MASTER-IAC |  P- |   540 | 18.97 |  Coadd\n     2760 |         MASTER-OAFA |   C |   180 | 19.26 |\n     2760 |         MASTER-OAFA |   C |   540 | 19.81 |  Coadd\n     3027 |          MASTER-IAC |  P- |   180 | 18.14 |\n     3093 |         MASTER-OAFA |   C |   180 | 19.26 |\n     3428 |         MASTER-OAFA |   C |   180 | 19.25 |\n     3761 |         MASTER-OAFA |   C |   180 |  19.3 |\n     3761 |         MASTER-OAFA |   C |   540 |  19.9 |  Coadd\n     3887 |          MASTER-IAC |  P- |   180 | 17.93 |\n     4094 |         MASTER-OAFA |   C |   180 | 19.27 |\n     4203 |          MASTER-IAC |  P- |   180 | 17.89 |\n     4203 |          MASTER-IAC |  P- |   540 | 18.43 |  Coadd\n     4428 |         MASTER-OAFA |   C |   180 |  19.3 |\n     4515 |          MASTER-IAC |  P- |   180 | 17.73 |\n     4758 |         MASTER-OAFA |   C |   180 |  19.3 |\n     4758 |         MASTER-OAFA |   C |   540 | 19.85 |  Coadd\n     4758 |         MASTER-OAFA |   C |  1800 | 20.26 |  Coadd\n     4835 |          MASTER-IAC |  P- |   180 | 17.45 |\n     5093 |         MASTER-OAFA |   C |   180 |  19.3 |\n     5151 |          MASTER-IAC |  P- |   180 | 17.08 |\n     5151 |          MASTER-IAC |  P- |   540 | 17.39 |  Coadd\nFilter C is unfiltred band (clear), calibrated by USNO B1 thousands field \nstars as 0.2B+0.8R.\n\nThe observation and reduction will continue.\nThe message may be cited.",
  "circularId": 23299,
  "createdOn": 1538575057000,
  "email": "lipunov@xray.sai.msu.ru",
  "subject": "GRB 181003A: MASTER optical observation",
  "submitter": "Vladimir Lipunov at Moscow State U/Krylov Obs  <lipunov@xray.sai.msu.ru>",
  "eventId": "GRB 181003A"
}