GCN Circular 7990
T-W Chen, L-C Huang, Y-T Chen (NCU) K.Y Huang (ASIAA) and Y. Urata (Saitama U./ASIAA) on behalf of the EAFON report; "We have been monitoring the optical afterglow of GRB080721 (Marshall et al. GCN Circ 7988) using the Lulin 1 m telescope after the twilight (~ 96 min after the burst). Based on Lulin R-band data, the optical afterglow is located at RA=14:57:55.835, Dec=-11:43:24.76 with less than 1" position error. The brightness of the optical afterglow at 98 min after the burst is R~18.1. Further optical observation is in progress."