GCN Circular 34
Bruce Grossan, Robert Knop, Saul Perlmutter (Lawrence Berkeley National Laboratory and CfPA, U.C. Berkeley), and Isobel Hook(ESO) report that the optical transient counterpart to GRB980326 was observed with 900 seconds of exposure at Keck II with the LRIS instrument on UT 1998 March 30.2. Relative photometric measurements were made with respect to the second and third stars given in IAUC6582, and the average of these two relative measurements yielded approximately R=24.5 mag. A 1.5" aperture was used in 0.9" seeing conditions for these preliminary results.