GCN Circular 3199
H.- W. Chen (MIT), Paul J. Green (CfA), J. S. Bloom (UCB), & J. X. Prochaska (UCSC) report on behalf of the GRAASP collaboration: "We began imaging the position of GRB050408 at 00:12, April 9 (UT), using IMACS on the Magellan/Baade telescope in the R and I bands. The afterglow candidate reported by de Ugarte Postigo et al. (GCN #3193) is detected in both bandpasses. Based on a comparison with objects found in the 2MASS catalog, we measured the coordinates of the afterglow as RA(J2000)= 12:02:17.328 and Dec(J2000)=+10:51:09.47 with an error of 250 mas in each coordinate. We also measure the afterglow brightness to be R = 21.7 +/- 0.1 mag and I = 21.4 +/- 0.1 mag with R-I=0.3, 7h50m after the initial trigger." This message may be cited.