GCN Circular 3705
A. Sota, A.J. Castro-Tirado, S. Guziy, M. Jel�nek, A. de Ugarte Postigo and J. Gorosabel (IAA-CSIC), A. Bodganov (Nikolaev St. Univ.) and M.D. P�rez- Ram�rez (Univ. de Ja�n): report: "We have imaged a 7' x 7' region centred on the SWIFT/ BAT error box for GRB 050730 (trigger 148225) with the 1.5-m OSN telescope (+ Albireo) at the Observatorio de Sierra Nevada starting on July 30 (20:26 UT, i.e. 0.45 hours after the GRB) under good meteorological conditions. Within the SWIFT/BAT error box, a single R-band image (300 s exposure time) shows a bright point source close to the center of the error not present in the DSS-2. Coordinates yield: RA(2000) = 14 08 17.14, Dec(2000) = -03 46 17.8 (+/- 0.35"). We measure R = 17.0 using the USNO-A2.0. This is very likely optical afterglow to GRB 050730." This message can be quoted.