GCN Circular 12272
J. C. Tello, A. Sota and A. J. Castro-Tirado (IAA-CSIC Granada), on behalf of a larger collaboration, report: "We observed SGR 1834.9-0846/ GRB 110807A detected by Swift/BAT (D'Elia et al., GCNC 12253, Barthelmy, GCN 12259) with the OSN 1.5m telescope. I-band frames were obtained on 7 Aug, starting 16 min after the gamma-ray detection (i.e. simultaneously to the BTA Rc-band observations, Moskvitin et al., GCNC 12254). Neither on the single I-band images (10s exposure time each) nor on the co-added frames, taken between 20:14 and 21:48 UT, with total exposure 4820 sec, an object is detected within the Swift/XRT error box. The limiting magnitude for the combined image is I = 21.6 (calibrated against USNO B1.0)." This message may be cited.