TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  2589
SUBJECT: GRB040511: Optical Observations
DATE:    04/05/12 07:09:23 GMT
FROM:    Gerald Bourban at Geneva Observatory  <grb@obs.unige.ch>

G.Bourban*, D.Naef* **, G.Burki*, F.Carrier* and L.Weber* report:
(*  Geneva Observatory, Switzerland)
(** ESO Santiago, Chile)

We have carried out optical observations of the field of GRB 040511 
(HETE trigger #3218, GCN 2588) using the C2 CCD Camera (12'x 12') 
mounted on the Swiss 1.2-meter telescope located at the ESO La Silla 
Observatory (Chile), beginning at 22:58 UT on 2004 May 11 (9.93 hours 
after the burst). We obtained four R filtered images, with exposure 
times of 180 and 480 s.

The comparison between these images with the USNO-A2 catalog does not 
reveal any new source down to a limiting magnitude of R < 19.4 inside 
the 80" error circle around the position provided by the HETE SXC Ground 
analysis (GCN 2588).

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