{
  "bibcode": "2020GCN.27304....1M",
  "body": "Y.-L. Mong (1); K. Ackley (1); D. K. Galloway (1); D. Steeghs (2); V. \nDhillon (3); P. O'Brien (4); G. Ramsay (5); D. Pollacco (2); E. Thrane \n(1); S. Poshyachinda (6); R. Kotak (7); L. Nuttall (8); E. Pall\\'e (9); \nK. Ulaczyk (2); J. Lyman (2); R. Cutter (2); A. Levan (2); T. Marsh (2); \nR. West (2); E. Stanway (2); B. Gompertz (2); K. Wiersema (2); T. \nKillestein (2); A. Casey (1); M. Brown (1); B. Muller (1); M. Dyer (3); \nJ. Mullaney (3); E. Daw (3); S. Littlefair (3); J. Maund (3); L. \nMakrygianni (3); U. Burhanudin (3); R. Starling (4); R. Eyles (4); S. \nTooke (4); S. Aukkaravittayapun (6); U. Sawangwit (6); S. Awiphan (6); \nD. Mkrtichian (6); P. Irawati (6); S. Mattila (7); T. Heikkil\\\"a (7); E. \nRol (1)\n\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 de \nAstrofisica 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 2000303A (Cenko et al. \n2020; GCN #27297; Fermi GBM; GCN #27294).\n\nWe made a series of 3 x 60 s exposures using our wide L-band filter \n(400-700 nm) covering the Swift XRT position (Cenko et al. 2020; GCN \n#27297), starting at 6.4 minutes after the Swift BAT trigger with \nmidtime 02:52:17 UT on 03 March 2020.\n\nUsing a difference imaging analysis with recent survey observations of \nthe same pointings as reference, we identify no viable afterglow \ncandidate. Our mean 5-sigma detection limit was g=19.6 mag based on PS1 \ncatalogue calibrators.\n\nGOTO is operated at the La Palma observing facilities of the University \nof Warwick on behalf of a consortium including the University of \nWarwick, Monash University, Armagh Observatory, the University of \nLeicester, the University of Sheffield, the National Astronomical \nResearch Institute of Thailand (NARIT) and the Instituto de Astrofisica \nde Canarias (IAC) (https://goto-observatory.org)",
  "circularId": 27304,
  "createdOn": 1583238104000,
  "email": "b.gompertz@warwick.ac.uk",
  "subject": "GRB 200303A: GOTO observations upper limit",
  "submitter": "Ben Gompertz at U of Warwick  <b.gompertz@warwick.ac.uk>",
  "eventId": "GRB 200303A"
}