{
  "bibcode": "2019GCN.23766....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 190114C (Gropp et al., GCN 23688)\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 January 17, 2019 (6 frames x 300\nsec, UT = 17:42 - 18:28), ~ 69 hours after the burst. In the combined\nimage we detected the optical transient observed earlier by many\ngroups (Tyurina et al., GCN 23690; de Ugarte Postigo et al., GCN\n23692; Lipunov et al. GCN 23693; Selsing et al. GCN 23695; Izzo et\nal. GCN 23699; Bolmer et al. GCN 23702; Castro-Tirado et al. GCN\n23708; Kann et al. GCN 23710; Im et al. GCN 23717; Siegel et al. GCN\n23725; Mazaeva et al., GCNs 23727, 23741; D'Avanzo et al., GCN 23729;\nKim et al., GCNs 23732, 23734; Kumar et al., GCN 23742, Mazaeva et\nal., GCN 23746, Ragosta et al., GCN 23748, Watson at al., GCN 23749,\nWatson et al., GCN 23751).\n\nUsing the observations of Landolt standard stars we estimated the\nbrightness of the optical object in the combined image as\nRc=20.7+-0.1. Taking into account host galaxy brightness, r'=21.23,\nmeasured from Pan-STARRS archival imaging by de Ugarte Postigo et al\n(GCN 23692) we can conclude that OT brighness should be around\n21.8+-0.1.",
  "circularId": 23766,
  "createdOn": 1548101118000,
  "email": "rodion@hea.iki.rssi.ru",
  "subject": "GRB 190114C: RTT150 optical observations",
  "submitter": "Rodion Burenin at IKI, Moscow  <rodion@hea.iki.rssi.ru>",
  "eventId": "GRB 190114C"
}