{
  "bibcode": "2020GCN.27332....1A",
  "body": "K. Ackley (1); K. Wiersema (2); Y.-L. Mong (1); D. K. Galloway (1);\nD. Steeghs (2); V.Dhillon (3); P. O'Brien (4); G. Ramsay (5);\nD. Pollacco (2); E. Thrane (1); S. Poshyachinda (6); R. Kotak (7);\nL. Nuttall (8); E. Pall\\'e (9); K. Ulaczyk (2); J. Lyman (2);\nR. Cutter (2); A. Levan (2); T. Marsh (2); R. West (2); E. Stanway (2);\nB. Gompertz (2);  T. Killestein (2); A. Casey (1); M. Brown (1);\nB. Muller (1); M. Dyer (3); J. Mullaney (3); E. Daw (3);\nS. Littlefair (3); J. Maund (3); L. Makrygianni (3); U. Burhanudin (3);\nR. Starling (4); R. Eyles (4); S. Tooke (4); S. Aukkaravittayapun (6);\nU. Sawangwit (6); S. Awiphan (6); D. Mkrtichian (6); P. Irawati (6);\nS. Mattila (7); T. Heikkil\\\"a (7); E. Rol (1)\n((1) Monash University, (2) Warwick University, (3) University of\nSheffield, (4) University of Leicester, (5) Armagh Observatory &\nPlanetarium, (6) National Astronomical Research Institute of Thailand,\n(7) University of Turku, (8) University of Portsmouth, (9) Instituto\nde Astrofisica de Canarias)\n\nreport on behalf of the GOTO collaboration:\n\nWe carried out observations with the Gravitational-wave Optical\nTransient Observer (GOTO), in response to GRB 2000306C\n(Palmer et al. 2020; GCN #27326).\n\nWe made a series of 9x60 s exposures using our wide L-band filter\n(400-700 nm) covering the Swift UVOT position (Palmer et al. 2020; GCN\n#27326), starting at 1.1 hours after the Swift BAT trigger with\nmidtime 23:56:45 UT on 06 March 2020.\n\nUsing a difference imaging analysis with recent survey observations\nof the same pointings as reference, we do not identify the detections\nfrom MASTER (Lipunov et al. GCN #27324), FRAM (Jelinek et al. GCN #27328),\nand BOOTES-1 (Castro-Tirado et al. GCN #27329). Our mean 5-sigma detection\nlimit was g=19.1 mag based on PS1 catalogue calibrators.\n\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": 27332,
  "createdOn": 1583542656000,
  "email": "kendall.ackley@monash.edu",
  "subject": "GRB 200306C: GOTO upper limits",
  "submitter": "Kendall Ackley at Monash University  <kendall.ackley@monash.edu>",
  "eventId": "GRB 200306C"
}