[vsnet-grb-info 4423] GRB 070311: Optical observation.

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  6204
SUBJECT: GRB 070311: Optical observation.
DATE:    07/03/13 23:54:45 GMT
FROM:    Giuseppe Greco at U Bologna  <giuseppe.greco2 at studio.unibo.it>

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

We observed the field of GRB 070311 (Mereghetti et al. GCN 6189)
with the 152 cm Loiano telescope in the Rc band in clear sky conditions. 
One 1800 sec exposure was obtained, significantly deeper than the 
DSS catalogue. The afterglow found by Covino et al.(GCN 6190) 
is detected with R = 22.3+/0.2 based on the NOMAD catalog. 
Our obsevation was done on 2007 March 13.792 UT middle exposure time.

The image, in which the comparison stars are marked, has been 
posted in our public directory from where it can be retrieved 
by sftp using 
hostname: ermione.bo.astro.it
username: publicGRB
password: GRB_bo.
directory: GRB070311