GCN Circular 321
S. Covino, D. Fugazza, G. Ghisellini, D. Lazzati, of the Observatory of Brera (Milan, Italy) report: We have obtained R=18.96+-0.02 for the OT of GRB990510, observed with 3x10 second exposures of VLT-FORS1 at May 11.0468. This estimate is based on the USNO star at RA = 13:38:00.82, DEC=-80:29:11.7, for which we have assumed R = 16.5. The faint object 2" south of the OT is also visible, with approximately R=21.9+-0.2 (see GCN 314). This message is citeable.