TITLE: GCN GRB OBSERVATION REPORT NUMBER: 4831 SUBJECT: GRB 060218/SN 2006aj: WIRO optical observations DATE: 06/02/25 09:00:04 GMT FROM: Chris Rodgers at U of Wyoming C. Rodgers, D. Allen, B. Barlow, C. Garcia, M. Pierce, R. Canterna (U of Wyoming) report on behalf of the Wyoming Infra-Red Observatory (2.3m) GRB Team as part of the FUN GRB Collaboration. GRB 060218/SN 2006aj was observed at the postion reported by Kennea et al. (GCN 4776) at 2006/02/25 02:03:49 UT in Johnson B. The following B magnitudes were determined using the USNO B1.0 catalog with a S/N ~ 180. B (mag) B err (mag) UT 18.250 0.007 02:03:49 18.281 0.006 02:09:48 18.276 0.006 02:33:12 18.295 0.006 02:51:45 18.282 0.007 02:57:13 18.259 0.006 03:14:08 18.245 0.006 03:19:32 18.293 0.011 04:52:09 18.245 0.010 04:57:32 This message may be cited.