GCN Circular 10384
S. Guziy, F. J. Aceituno and A. J. Castro-Tirado (IAA-CSIC Granada), on behalf of a larger collaboration, report: �Following the detection of the short-duration gamma-ray burst GRB 100206A by Swift/BAT (Krimm et al. GCN Circ. 10376), we have conducted follow-up observations with the 0.6m TELMA robotic telescope (+ clear filter) at the BOOTES-2 station in M�laga and with the 1.5m OSN telescope (+ I-band filter) at Observatorio de Sierra Nevada in Granada. No optical afterglow is detected within the Swift/XRT error box (Goad et al., GCN Circ. 10378). An upper limit of I = 21 is derived from a combined 9 x 150-s I-band image obtained starting at 18:40 UT (5.2 hr postburst), consistent with the null result reported by Bhattacharya et al. (GCN Circ. 10380). The candidate host galaxy reported by Miller et al. (GCN Circ. 10377) is also detected at the edge of the error box.� This message can be quoted.