TITLE: GCN CIRCULAR NUMBER: 12699 SUBJECT: GRB 111205A: Confirmation of X-ray Afterglow DATE: 11/12/16 22:33:55 GMT FROM: Erik Hoversten at Swift/Penn State E. A. Hoversten (PSU) and C. A. Wolf (PSU) report on behalf of the Swift team: We have analyzed 8.3 ks of XRT data for the IPN detected burst GRB 111205A (Hurley et al. GCN Circ. 12626) from 828 to 853 ks after the burst. The data are entirely in Photon Counting (PC) mode. Previously an uncataloged X-ray source was detected by XRT 200 ks after the burst (Wolf & Hoversten GCN Circ. 12630) which was identified as the potential afterglow for GRB 111205A, but could not be confirmed as it was not possible to discern if the source was fading in a single observation. The follow-up observation reveals that the source is still detected, but has faded by a factor of 4, which corresponds to a decay index of 1.0 (+1.3, -0.6) which is consistent with a GRB late time afterglow. Thus we conclude that the X-ray source previously reported is the afterglow.