GCN Circular 11418
S. B. Cenko (UC Berkeley) and E. O. Ofek (Caltech) report on behalf of a larger collaboration: We have imaged the field of the MAXI/GSC X-ray transient XRF 101117A (Yamazaki et al., GCN 11410) with the Palomar 48 inch Schmidt telescope as part of the Palomar Transient Factory (PTF; Law et al., PASP, 121, 1395; Rau et al., PASP, 121, 1334). Images were obtained with a Mould R filter beginning at 6:02 UT on 18 November 2011 (~ 22.5 hours after the MAXI/GSC trigger) and cover > 90% of the reported localization region. Comparison with pre-explosion images from the Digitized Sky Survey reveals no new transient sources within the reported error box. Referencing our images to a series of point sources from the USNO-B1 catalog, we place a limiting magnitude of R > 20 at this time.