{
  "bibcode": "2018GCN.22929....1B",
  "body": "I. Bikmaev, E. Irtuganov, N. Sakhibullin (KFU/AST),\nR. Burenin, M. Pavlinsky, R. Sunyaev (IKI),\nI. Khamitov, S. Ozdemir (TUG), E. Gogus (Sabanci Uni.)\n\nreport:\n\nWe observed the field of GRB 180705A (Stamatikos et al., GCN 22902)\nwith the Russian-Turkish 1.5-m optical telescope (RTT150, Bakirlitepe,\nTUBITAK National Observatory, Turkey) using the TFOSC instrument.\n\nWe obtained series of Rc exposures in July 05, 2018 (6 frames x 600\nsec, UT = 19:12 - 20:19), ~ 4 hours after the burst. Within enhanced\nSwift-XRT position (Goad et al., GCN 22906) we have not detected any\nobject down to Rc =~ 23.5 mag in the combined image (calibrated\nagainst SDSS secondary standard stars).  Our result confirms OT\nnon-detections as published in other GCNs (Lipunov et al., GCN 22904,\nWatson et al., GCN 22911, Breeveld et al., GCN 22912, Mazaeva et al.,\nGCN 22913).",
  "circularId": 22929,
  "createdOn": 1531068174000,
  "email": "rodion@hea.iki.rssi.ru",
  "subject": "GRB 180705A: RTT150 optical upper limit",
  "submitter": "Rodion Burenin at IKI, Moscow  <rodion@hea.iki.rssi.ru>",
  "eventId": "GRB 180705A"
}