TITLE: GCN GRB OBSERVATION REPORT NUMBER: 5236 SUBJECT: GRB 060607: PROMPT Observations DATE: 06/06/07 06:15:38 GMT FROM: Melissa Nysewander at UNC,Chapel Hill M. Nysewander, J. Haislip report on behalf of the UNC GRB Team: PROMPT began observing the position of the XRT error circle (Ziaeepour et al., GCN 5233) 44 seconds after the GRB trigger, 25 seconds after the initial alert in Ugriz. We confirm the presence of the bright, fading optical afterglow: in our initial r' image, we find the source to be r' ~ 16.3 at a mean time of 65 seconds after the burst. It then brightened to r' ~ 16 at 90-s, and by 140-s it had risen to a magnitude of r' ~ 14.5.