[vsnet-grb-info 9559] GRB 100725B: TELMA optical observation

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  11030
SUBJECT: GRB 100725B: TELMA optical observation
DATE:    10/07/30 16:26:49 GMT
FROM:    Sergey Guziy at IAA CSIC  <gss at iaa.es>

J. C. Tello, R. Sánchez, M. Jelínek, P. Kubánek, S. Guziy,
A. J. Castro-Tirado (IAA-CSIC Granada) on behalf of a
larger collaboration report:

"Following the detection of GRB 100725B by Swift (Baumgartner et al.
GCNC 10983), we have obtained optical images with the 0.6m TELMA robotic
telescope at the BOOTES-2 station located in Southern Spain.

At the position of the X-ray afterglow detected by SWIFT/XRT (Goad et
al. GCNC 10986) we do not detect any optical source down to i' < 19 in
the co-added 187 images (60-s each, using an i' band filter, at 20:41 UT,
i.e. 9.3-hr after the onset of the burst).

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