GCN Circular 9557
S. B. Cenko (UC Berkeley), A. J. Levan (U. Warwick), M. M. Kasliwal, S. R. Kulkarni (Caltech) report on behalf of a larger collaboration: We have imaged the field of the short GRB090621B (Curran et al., GCN 9545) with the automated Palomar 60-inch telescope. Observations consisted of 20 x 180 s images in the i' filter at a mean epoch of 5:37 UT on 22 June 2009 (~ 7.5 hours after the burst). We detect the candidate afterglow reported by Levan et al. (GCN 9547) and Galeev et al. (GCN 9549) at low significance. Using several USNO-B sources in the field for reference, we measure a magnitude of I ~ 22.9. No other sources are detected inside the revised XRT error circle (Beardmore et al., GCN 9550). Directly comparing our P60 image with the WHT image from ~ 2 hours after the burst (GCN 9547), we find the candidate has faded marginally by 0.5 +- 0.3 mag. Further late-time observations will be needed to confirm if this is the optical afterglow of GRB090621B.