TITLE: GCN CIRCULAR NUMBER: 22728 SUBJECT: GRB 180514A: GOTO Optical Observations DATE: 18/05/14 21:46:20 GMT FROM: Ben Gompertz at U of Warwick B.Gompertz (U. Warwick), K.Ulaczyk (U. Warwick), M.Dyer (U. Sheffield), E.Rol (Monash U.), K. Ackley (Monash U.), D.Steeghs (U. Warwick), D.Galloway (Monash U.), G.Ramsay (Armagh O.), V.Dhillon (U. Sheffield), P.O'Brien (U. Leicester), S.Poshyachinda (NARIT), D.Pollacco (U. Warwick), E.Thrane (Monash U.) report on behalf of the GOTO collaboration: The Gravitational-wave Optical Transient Observer observed the field of GRB 180514A (trigger=832368, LaPorte et al. GCN Circ. 22723) from Roque de los Muchachos Observatory beginning at 2018-05-14T21:09:12 UT, 7.73 hours since burst, in several wide-band filters. In a combined L-band image (400-700nm passband), with a total exposure time of 360s, we do not detect any optical source within the enhanced XRT error circle (Goad et al., GCN Circ. 22725) down to a 5-sigma limiting magnitude of V > 20.7 based on a comparison to APASS V-band calibrators. Further observations are planned. GOTO is operated at the La Palma observing facilities of the University of Warwick on behalf of a consortium including the University of Warwick, Monash University, Armagh Observatory, the University of Leicester, the University of Sheffield, the National Astronomical Research Institute of Thailand (NARIT) and the Instituto de Astrofisica de Canarias (IAC) https://goto-observatory.org/