TITLE: GCN GRB OBSERVATION REPORT NUMBER: 5195 SUBJECT: GRB 060502A: Optical afterglow observations DATE: 06/06/02 15:06:26 GMT FROM: Pall Jakobsson at U Hertfordshire Pall Jakobsson (Univ. of Hertfordshire), Erik Zackrisson, Janne Holopainen (Tuorla Observatory), Genoveva Micheva (Stockholm Observatory), Brian L. Jensen, Johan P. U. Fynbo and Jens Hjorth (DARK, NBI) report: Using MOSCA on the 2.56-meter Nordic Optical Telescope, we obtained 3*300 s R-band images of the GRB 060502A field (La Parola et al., GCN#5047) on May 3.21 (1.08 days post burst). At the location of the optical afterglow (Pool et al., GCN#5068), 0.7 arcsec outside the XRT borders (La Parola et al., GCN#5054), we detect a source with R = 22.5. Combined with the R-band magnitude reported by Hicken & Garnavich (GCN#5070), this implies a decay slope of alpha = 1.0. An image of the field is shown at: http://star-www.herts.ac.uk/~palli/grb060502A/grb060502A.jpg