{
  "subject": "GRB 160119A: NOT and GTC afterglow candidate",
  "eventId": "GRB 160119A",
  "bibcode": "2016GCN.18895....1M",
  "createdOn": 1453179973000,
  "circularId": 18895,
  "submitter": "Daniele Malesani at Dark Cosmology Centre, Niels Bohr Inst  <malesani@dark-cosmology.dk>",
  "email": "malesani@dark-cosmology.dk",
  "body": "D. Malesani (DARK/NBI), A. de Ugarte Postigo (IAA-CSIC and DARK/NBI), D. \nXu (NAO/CAS), C.E. Martinez-Vazquez (IAC-ULL), A. Tejero (GTC), S. Geier \n(GTC), C.C. Thoene (IAA-CSIC), P. Jakobsson (Univ. Iceland) report on \nbehalf of a larger collaboration.\n\nWe observed the field of GRB 160119A (Marshall et al., GCN 18893) with \nthe Nordic Optical Telescope (NOT) equipped with the ALFOSC camera. \nObservations were carried out in the SDSS r and i bands, starting on \n2015 Jan 19.151 UT (31 min after the GRB trigger).\n\nWe also observed the same field using the Gran Telescopio Canarias \n(GTC), equipped with OSIRIS, starting on Jan 19.164 UT (50 min after the \nGRB trigger), also in the r and i bands.\n\nCompatible with the current XRT localization (3.6\" radius, SPER-based; \nhttp://www.swift.ac.uk/xrt_positions/), we detect a single, faint \noptical source, at coordinates (J2000):\n\nRA = 14:07:41.35\nDec = +20:27:40.1\n\nwith an uncertainty of <0.5\".\n\nUsing nearby stars from the SDSS catalog, we measure from the NOT image \na magnitude r = 22.75 +- 0.15 (AB). This magnitude measurement is \naffected by the extended glare of a nearby bright star, making \nbackground subtraction less accurate than normal. This object is also \nseen, faintly, in the short GTC images (30-60 s exposure).\n\nThe object seems marginally brighter than the SDSS detection limit. \nHowever, despite ~20 min time difference between the NOT and GTC data, \nwe do not measure obvious variability between the two epochs, as it is \ncommon among GRB afterglows close to the trigger. Further observations \nwill be necessary to ascertain the relation of this object with the GRB."
}