TITLE: GCN GRB OBSERVATION REPORT NUMBER: 1139 SUBJECT: GRB 011030 I-band Observation DATE: 01/11/09 19:29:34 GMT FROM: Jules Halpern at Columbia U. J. P. Halpern, N. Mirabal (Columbia), C. Burke, D. L. DePoy (Ohio State), & S. Gaudi (IAS), report on behalf of the MDM Observatory GRB follow-up team: "Using the MDM 2.4m, we reobserved this location in the I band on Nov. 9.23 UT. In two 8 minute exposures in seeing of 1.2 arcseconds, there is a possible detection at the 2 sigma level of an object at position (J2000) 20:43:31.94, +77:17:19.0, which is 1.2 arcseconds west of the position reported for the new radio source that appeared on Nov 8.80 (Taylor et al. GCN #1136). Assuming for a calibration that the faintest objects on the POSS-II IVN plates have I=19.5, this possible counterpart would have I=22.5. Given the marginal level of this detection and its absence on previous images of comparable depth on Nov. 1, confirmation would be required. Alternatively, this may be considered an upper limit to the optical brightness of the radio source. The new image is posted at http://www.astro.columbia.edu/~jules/grb/011030 This message may be cited."