GCN Circular 13631

U.Quadri, L.Strabla and R.Girelli, A.Quadri report:

We imaged the field of GRB 120811C detected 
by SWIFT(trigger 530689) with the robotic 
telescope of (IAU station 565) Bassano Bresciano 
Observatory, Italy.

The observations started 266min. after the 
GRB trigger,with our schmidt telescope 
D=320 mm F/D=3.1.

Weather conditions were good.

We co-added a series of 30 exposures.

We did not found any optical counterpart 
in the error box of the XRTcandidate
(Barlow et al. GCNC 13622).

Start      End       Vlim
266min     326min    19.2

Magnitudes were estimated with the UCAC-3 

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