GCN Circular 1141
M. Brown, A. Dey (NOAO), A. Fruchter and J. Rhoads (STScI) report for a larger collaboration: The field of the radio transient (Taylor et al., GCN 1136) potentially associated with GRB011030 was imaged at the KPNO 4-m using the Multi-Aperture Red Spectrometer (MARS) through an RG830 (approximately z-band) filter from 1:55 to 2:50 12 NOV 01 UT. Due to significant overhead associated with the instrument, the total exposure time was 600 seconds; the seeing was approximately 1."5. No source was detected at the position of the radio transient, or that of the potential I-band object nearby reported by Halpern et al. (GCN 1139), down to a limiting (Vega) magnitude of 22.5 (5-sigma).