TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  3705
SUBJECT: GRB 050730, optical candidate
DATE:    05/07/30 21:15:44 GMT
FROM:    Alberto Castro-Tirado at LAEFF-INTA  <ajct@laeff.esa.es>

A. Sota, A.J. Castro-Tirado, S. Guziy, M. Jelínek,
A. de Ugarte Postigo and J. Gorosabel (IAA-CSIC),
A. Bodganov (Nikolaev St. Univ.) and M.D. Pérez-
Ramírez (Univ. de Jaén):

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."

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