{
  "bibcode": "2017GCN.20577....1K",
  "body": "S.Karpov, G.Beskin (SAO RAS and Kazan Federal University, Russia), S.Bondar,\nE.Ivanov, E.Katkova, N.Orekhova, A.Perkov (OJS RPC PSI, Russia), A.Biryukov\n(SAI MSU and Kazan Federal University, Russia), V.Sasyuk (Kazan Federal\nUniversity, Russia)\n\nMini-MegaTORTORA nine-channel wide-field monitoring system  with high\ntemporal resolution responded to the BAT trigger and observed the position\nof GRB 170702A (Racusin et al. GCN 20575) since 2017-02-02 18:28:50 UT\n(T+47.8 s) and until 2017-02-02 18:39:04 UT (T + 662.0 s). The system\nacquired a series of 5 s exposure frames with all 9 channels pointed to the\nobject location in white light, with and without polarimetric filters\ninstalled. No transient object is detected over this interval, with\ndetection limit on a single frame V=13.0 mag. Co-adding 9 simultaneous\nframes improves the detection limit to V=14.0 mag at the mid-time of first\nexposure (Tmid = T+50.3 s, 5 s exposure).\n\nMini-MegaTORTORA belongs to Kazan Federal University and is located at\nSpecial Astrophysical Observatory near Russian 6-m telescope.\n\nThe message may be cited.",
  "circularId": 20577,
  "createdOn": 1486068174000,
  "email": "karpov@sao.ru",
  "subject": "GRB 170202A: Mini-MegaTORTORA upper limits",
  "submitter": "Sergey Karpov at SAO RAS  <karpov@sao.ru>",
  "eventId": "GRB 170202A"
}