TITLE: GCN CIRCULAR NUMBER: 17542 SUBJECT: GRB 150302A: BOOTES-2/TELMA upper limit DATE: 15/03/04 20:38:30 GMT FROM: Soomin Jeong at IAA-CSIC S. Jeong (IAA-CSIC & SKKU), M. Jelinek, J. C. Tello (IAA-CSIC) and A. J. Castro-Tirado (IAA-CSIC & ISA-UMA), on behalf of a larger collaboration, report: "The 60 cm BOOTES-2/TELMA robotic telescope (Malaga, Spain) automatically responded to the Swift trigger of GRB 150302A (Lien et al., GCN 17526). The first exposure started at 05:43:54 UT (78s after the trigger) and a sequence of 79 images was obtained (3s each, z filter). A median combined image revealed no credible optical source detection neither at the enhanced XRT error circle (Goad et al., GCN 17534) nor at the optical counterpart position (Fynbo et al., GCN 17527) down to 18.5 mag (3 sigma UL). It is calibrated against the SDSS z-field."