TITLE: GCN GRB OBSERVATION REPORT NUMBER: 1140 SUBJECT: GRB 011030 R band observations DATE: 01/11/10 02:36:39 GMT FROM: James Rhoads at STScI James E. Rhoads, Ingunn Burud, Andrew Fruchter, Chryssa Kouveliotou, and Michael Wood-Vasey report on behalf of a larger collaboration: We observed the error circle of GRB 011030 with the 3.5m WIYN telescope and mini-mosaic imager on the nights of UT 011101, 011102, and 011103, obtaining five 600 second images in the R band each night. We find no source at the location of the new radio source reported by Taylor et al (GCNC 1136). If we adopt the R band zero point used by Bloom et al (GCNC 1137), the corresponding 5 sigma upper limits are R=23.61 (011101) and R=23.28 (011103). In addition, we performed a seeing-matched image subtraction on the 011101 and 011103 data. The difference image shows no significantly variable sources. The estimated photometric noise level in the difference image (for a 1 arcsec radius aperture) is 0.5 microJansky (1 sigma), corresponding to R=24.5 (1 sigma) or R=22.7 (5 sigma). Further analysis of existing data is underway, and at least one additional observation is planned. We thank Doug Williams and Di Harmer for their help in these observations.