TITLE:   GCN CIRCULAR
NUMBER:  22839
SUBJECT: GRB 180624A: LCO Siding Springs afterglow candidate
DATE:    18/06/25 06:43:03 GMT
FROM:    Cristiano Guidorzi at Ferrara U,Italy  <guidorzi@fe.infn.it>

C. Guidorzi, R. Martone (U. Ferrara), S. Kobayashi (LJMU), C.G. Mundell 
(U. Bath), A. Gomboc (U. Nova Gorica), I.A. Steele (LJMU), A. Cucchiara 
(U. of Virgin Islands) on behalf of a large collaboration report:

One LCO 1-m unit at Siding Springs Observatory began observing Swift GRB 
180624A (Gibson et al. GCN 22832) on June 24, 14:18 UT (28.5 min since 
the GRB trigger time) with the SDSS r filter. Within the enhanced 
Swift-XRT error circle (Goad et al. GCN 22835) we find an uncatalogued 
object with a magnitude of r'=19.92 +- 0.10 (AB) at a mid time of 0.54 
hours since the GRB trigger time at the following position:

RA(J2000) = 21:12:23.38
DEC(J2000)= -02:20:16.7

with an error radius of ~1".