TITLE: GCN CIRCULAR NUMBER: 12717 SUBJECT: GRB 111222A: Swift/UVOT Observations DATE: 11/12/24 06:29:06 GMT FROM: Mike Siegel at PSU/Swift MOC M. H. Siegel and D. Grupe (PSU) report on behalf of the Swift/UVOT team: We have analyzed 2.3 ks of UVOT data for the IPN-detected burst: GRB 111222A (Hurley et al. et al. GCN Circ. 12714), from 92.9 ks to 95.2 ks after the IPN trigger. The data are entirely in the white filter. We detect a faint optical source consistent with the XRT source reported in Grupe (GCN Circ. 12716) at a position of RA, Dec = 179.22008, Dec = 69.07096 , which is equivalent to: RA (J2000): 11h 56m 52.82s Dec(J2000): +69d 04' 15.4" with an uncertainty of 0.51 arcsec (radius, 90% confidence). Preliminary photometry using the UVOT photometric system (Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) shows a white magnitude of 19.34+-0.03. The magnitude is not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.01 in the direction of the burst (Schlegel et al. 1998). We note, however, that a source is present at this position in the DSS. Follow-up observations will be needed to determine if the X-ray/optical source is indeed the GRB afterglow.