TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  3796
SUBJECT: GRB 050813: I-band observations
DATE:    05/08/13 22:17:21 GMT
FROM:    Javier Gorosabel at IAA-CSIC  <jgu@iaa.es>

J. Gorosabel, S. Guziy, A. Sota, A.J. Castro-Tirado,
A. de Ugarte Postigo, M. Jelinek, (IAA-CSIC), report:

"We have taken 7x600s I-band images of the XRT error box
  of GRB 050813 (GCN Circ. 3790) with the 1.5m OSN
  telescope. Several objects are seen close/consistent
  with the XRT error circle. A finding chart  can be found at:

   http://www.dsri.dk/~jgu/grb050813/FCs/GRB050813.OSN.gif

  Objects B and C show an extended shape. Further observations
  will required to see variability of those (and other) objects."