{
  "bibcode": "2018GCN.23503....1R",
  "body": "G.Ramsay (Armagh O.), J.Lyman, K.Ulaczyk, D.Steeghs, K.Wiersema\n(U. Warwick), M.Dyer (U. Sheffield), B.Gompertz, A.Levan, R.Cutter\n(U. Warwick) K. Ackley, D.Galloway, E.Rol (Monash U.), V.Dhillon\n(U. Sheffield), P.O'Brien, R.Starling (U. Leicester), S.Poshyachinda\n(NARIT), D.Pollacco (U. Warwick), E.Thrane (Monash U.), E.Palle (IAC)\n\nreport on behalf of the GOTO collaboration:\n\nThe Gravitational-wave Optical Transient Observer observed the field\nof the long duration GRB 181201A (Mereghetti et al. GCN Circ. 23469,\nPage et al. GCN Circ. 23474) from Roque de los Muchachos Observatory.\n\nWe report two optical photometric detections, both made using a\ncombined L-band image (400-700nm passband), each with a total exposure\ntime of 300s.  The resulting preliminary magnitudes are based on a\ncomparison to Panstarrs g-band calibrators and include a systematic\nerror component due to the calibration uncertainty.\n\nmidpoint                 time elapsed since burst   g\n2018-12-01 19:33:18 UT   0.705 days                 17.74+/-0.10 mag\n2018-12-03 19:41:21 UT   2.711 days                 19.48+/-0.15 mag\n\nGOTO is operated at the La Palma observing facilities of the\nUniversity of Warwick on behalf of a consortium including the\nUniversity of Warwick, Monash University, Armagh Observatory, the\nUniversity of Leicester, the University of Sheffield, the National\nAstronomical Research Institute of Thailand (NARIT) and the Instituto\nde Astrofisica de Canarias (IAC) (https://goto-observatory.org/)",
  "circularId": 23503,
  "createdOn": 1543932578000,
  "email": "dsteeghs@gmail.com",
  "subject": "GRB181201A: GOTO optical observations",
  "submitter": "Danny Steeghs at U.of Warwick/GOTO  <dsteeghs@gmail.com>",
  "eventId": "GRB 181201A"
}