{
  "bibcode": "2016GCN.19999....1M",
  "body": "K. L. Murata (Nagoya University),  K. Miyakawa (Tokyo Institute of\nTechnology), and T. Nagayama (Kagoshima University)\n\nWe observed the field of GRB 161001A ( Page et al., GCN Circular #19967)\nwith the near-infrared (J, H, Ks) simultaneous imaging camera SIRIUS\nattached to 1.4 m telescope IRSF ( InfraRed Survey Facility) in Sutherland\nobservatory, South Africa.\n\nThe observations started on 2016-10-01 02:41:46 UT (~ 95 min. after the\nburst). We could not detect  the afterglow within the enhanced XRT error\ncircle (Osborne et al., GCN Circular #19969) in the three bands. We have\nobtained the following preliminary upper limits (Vega magnitude system):\n\n J > 14.61\n H >14.19\n Ks > 14.01\n\nGiven magnitudes were calibrated against 2MASS point sources in this field.\nThe upper limits were determined as the magnitudes of the fainter star\nwithin 1 arcmin from the enhanced XRT position.\n\nThis observation was carried out by IRSF and OISTER collaboration.",
  "circularId": 19999,
  "createdOn": 1475729304000,
  "email": "murata@u.phys.nagoya-u.ac.jp",
  "subject": "GRB 161001A: IRSF upper limits",
  "submitter": "Katsuhiro L. Murata at Nagoya U  <murata@u.phys.nagoya-u.ac.jp>",
  "eventId": "GRB 161001A"
}