TITLE: GCN CIRCULAR NUMBER: 16274 SUBJECT: GRB 140515A: Gemini-North imaging DATE: 14/05/15 19:26:23 GMT FROM: Wen-fai Fong at CFA W. Fong (Harvard), R. Chornock (Harvard), D. Fox (PSU), and E. Berger (Harvard) report: "We observed the location of the long-duration GRB 140515A (D'Avanzo et al., GCN 16267) with the Gemini Multi-Object Spectrograph (GMOS) mounted on the Gemini-North 8-meter telescope at a mid-time of 2014 May 15.458 UT (1.78 hr after the BAT trigger). We obtained 480 sec in each of the i- and z-bands in 0.45" seeing. We detect the optical afterglow (Chornock et al., GCN 16269), within the enhanced XRT position (Goad et al., GCN 16270), located at RA(J2000) = 12:24:15.51 Dec(J2000) = +15:06:16.6 with a positional uncertainty of 0.1" in each coordinate. The optical afterglow has a brightness of z = 20.27 +/- 0.11 AB mag, and is at least 3 mag fainter in our i-band observations. Both the astrometry and photometry are calibrated to SDSS. We thank the Gemini staff for their assistance with these observations."