GCN Circular 22728

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
Not found
 
 
) 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
Not found
 
 
) 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/