[vsnet-grb-info 2126] GRB 050911, optical observations

[GCN Circulars]

TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  3965
SUBJECT: GRB 050911, optical observations
DATE:    05/09/11 23:31:57 GMT
FROM:    Alberto Castro-Tirado at LAEFF-INTA  <ajct at laeff.esa.es>

P. Tristram (Univ. of Canterbury, New Zealand),
A. J. Castro-Tirado, S. Guziy, A. de Ugarte Postigo,
M. Jelinek, J. Gorosabel (IAA-CSIC, Granada, Spain),
and Ph. Yock (Univ. of Auckland, New Zealand)

report:

"We have imaged the GRB 050911 error box provided by Swift/BAT
(Page et al.  GCN 3961) with the 0.6m telescope (+MOA camera)
at Mt. John Observatory. 5 x  300s second integrations in
the wide R-band filter were taken starting at 16:35:16 UT
(i.e. 36 min after burst). Within the refined Swift/BAT error
box (Tueller et al. GCN 3964), the coadded image does not
reveal any variable object down to R~21 when comparing to
the DSS-2."

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