TITLE: GCN GRB OBSERVATION REPORT NUMBER: 5286 SUBJECT: GRB060614: Possible SN Bump in UVOT U Band Light Curve DATE: 06/07/07 22:44:25 GMT FROM: Peter Brown at PSU Peter J. Brown (Penn State) & Stephen T. Holland (NASA/GSFC & USRA) report on behalf of the Swift UVOT team: Swift has been continuing to monitor the counterpart to GRB060614 (Parsons et al. GCN 5252). The UVOT U band light curve, which was nearly flat during the period of 2-10 days after the burst at U~22.5 (Holland GCN 5281) has faded to U~24.0 +/- 0.7 (this last point being a 2.7 sigma detection from data taken between 15-23 days after the burst). The timing and shape of the plateau and subsequent decay are very similar to the U band light curve of GRB060218/SN2006aj (Campana et al. Nature, in press, astro-ph/0603279). At a redshift of 0.125 (Price, Berger, & Fox GCN 5275), the possible SN component has an absolute U magnitude about 2 magnitudes fainter than SN2006aj. We encourage observations at other wavelengths to determine whether the flattening previously observed (Fynbo et al. GCN 5277; Cobb & Bailyn GCN 5282) is from the host galaxy or whether a contributing SN component has since faded.