TITLE: GCN CIRCULAR NUMBER: 6163 SUBJECT: GRB 070227: optical observations DATE: 07/03/01 06:23:32 GMT FROM: Alan Gilmore at U of Canterbury,Mt John Obs A. C. Gilmore and P. M. Kilmartin (Mt John Observatory of the University of Canterbury) report: We stacked 20 x 60 second clear exposures with an Apogee U-47 CCD on a 0.6-m f/13.5 reflector at Mt John Observatory, centred on February 28 09:54 UT (11.5 hours after the burst.) Our images do not show any new object in or near the Swift-BAT error circle when compared with DSS-2 red and DSS-2 infra-red images. This message may be cited.