[vsnet-grb-info 7730] GRB 090429B: VLT upper limits

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  9284
SUBJECT: GRB 090429B: VLT upper limits
DATE:    09/04/29 08:30:22 GMT
FROM:    Paolo D'Avanzo at INAF-OAB  <paolo.davanzo at brera.inaf.it>

Paolo D'Avanzo (Univ. Milano-Bicocca & INAF/Brera), Andrew J. Levan 
(Univ. Warwick), Daniele Malesani (DARK/NBI), Christina C. Thoene 
(INAF/Brera), Johan P. U. Fynbo, Jens Hjorth (DARK/NBI), Nial Tanvir 
(Univ. Leicester), report on behalf of a larger collaboration:

We observed the field of GRB 090429B (Ukwatta et al. GCN 9281) with the 
ESO-VLT in imaging mode with the FORS2 camera. Observations started 
about 1 hr after the burst. In our stacked images, no afterglow is 
detected down to the following 3sigma limits:

R > 25.3
z > 23.5

Photometry has been calibrated against USNOB1 catalogue and the SDSS.

We acknowledge support from the Paranal staff, in particular E. Mason 
and P. Lynam.