GCN Circular 11030
J. C. Tello, R. S��nchez, M. Jel��nek, P. Kub��nek, S. Guziy, A. J. Castro-Tirado (IAA-CSIC Granada) on behalf of a larger collaboration report: "Following the detection of GRB 100725B by Swift (Baumgartner et al. GCNC 10983), we have obtained optical images with the 0.6m TELMA robotic telescope at the BOOTES-2 station located in Southern Spain. At the position of the X-ray afterglow detected by SWIFT/XRT (Goad et al. GCNC 10986) we do not detect any optical source down to i' < 19 in the co-added 187 images (60-s each, using an i' band filter, at 20:41 UT, i.e. 9.3-hr after the onset of the burst). This message can be quoted.