GCN Circular 10346
E. Berger, R. Chornock (Harvard), A. Cucchiara, D. B. Fox (PSU) report: "Starting on 2010 Jan 19.22 UT we used the GMOS spectrograph on the Gemini North 8-m telescope to obtain spectroscopic observations of several extended objects (GCNs 10339, 10340, 10341) located inside and near the revised XRT error circle (GCN 10342) of the short GRB 100117A (GCN 10336). The slit was aligned so that it covered sources S1, S2, and S3 (GCN 10339). Preliminary inspection of the combined 3000 sec spectrum covering the wavelength range 4000-8000 A reveals that source S1 is an M dwarf star. We detect continuum emission from sources S2 and S3 redward of about 5000 and 5600 A, respectively, but no clear emission or absorption features are identified."