[vsnet-grb-info 3806] GRB 060927 optical limit

[GCN Circulars]

TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  5640
SUBJECT: GRB 060927 optical limit
DATE:    06/09/27 23:03:03 GMT
FROM:    Graziella Pizzichini at IASF/CNR,Bologna  <pizzichini at iasfbo.inaf.it>

      G. Greco, C. Bartolini, A. Guarnieri, A. Piccioni (Bologna
      University),  F. Terra, Second University of Roma "Tor Vergata",
      D. Nanni (INAF/OAR and Second University of Roma "Tor Vergata"),
  S. Galleti, R. Gualandi (INAF Bologna) and G. Pizzichini (INAF/IASF
  Bologna) report:

  Using the 152 cm Loiano telescope equipped with the BFOSC camera
  system, we  obtained three 20 min. Rc-band images of the field of
  GRB060927 (Barbier et al., GCN 5627), starting at Sept. 27.763 ,
  27.779 and 27.795 respectively, seeing 2.2 arcsec.
  In our co-added images we do not detect the OT reported by Schaefer,
  Yost and Yuan  (GCN 5629). Our 3 sigma upper limit is Rc  = 21.7    .