TITLE: GCN GRB OBSERVATION REPORT NUMBER: 593 SUBJECT: GRB000301C OT candidate optical observations DATE: 00/03/05 22:05:02 GMT FROM: Elia Leibowitz at Wise Obs, Tel Aviv U A. Gal-Yam, E. Ofek, D. Maoz and E.M. Leibowitz, Wise Observatory, Tel Aviv University, Israel, report: Using the Wise Observatory 1-m telescope and the observatory new SiTe CCD camera, we obtained on March 4 two 900 sec and one 1800 sec exposures through an R filter, and one 1800 sec V exposure, of the GRB000301C OT candidate. The mean UT of the 3 R exposures is March 4.0799. The weighted mean R magnitude, measured relative to stars A-D of Garnavich et al. (GCN 573), is 20.573 +/- .06. The UT of the V image is March 4.1121, and the OT-ref* magnitude differences, with respect to stars A,B,C and D, are, respectively (+/-0.12): 2.356, 1.635, 1.342 and 3.683. This message is quotable in publications.