GCN Circular 8631
D. A. Perley and J. S. Bloom (UC Berkeley) report: We triggered Gemini-N (GMOS) observations of BATSS GRB 081203B (Copete et al., GCN 8600, 8602) starting at 15:04 UT 2008-12-06 through very high airmass but under good conditions. In our acquisition image we identify a source at the position of the optical afterglow (Schady et al., GCN 8606). Photometry, calibrated to SDSS, is: r = 21.90 +/- 0.06 (t = 3.05 days) Two spectroscopic integrations of 1200s each were acquired using the R150 grating. Preliminary inspection of the frames reveals no obvious line features between 5200-9000 A. Further analysis is continuing.