TITLE:   GCN CIRCULAR
NUMBER:  7489
SUBJECT: GRB 080320: optical limit
DATE:    08/03/20 19:06:50 GMT
FROM:    Daniele Malesani at Niels Bohr Inst,Dark Cosmology Center  <malesani@astro.ku.dk>

D. Malesani (DARK), A. A. Djupvik, J. Niemela (NOT), J. P. U. Fynbo 
(DARK), report on behalf of a larger collaboration:

We observed the field of GRB 080320 (Grupe et al., GCN 7473) with the 
Nordic Optical Telescope. R-band observations were carried out with the 
StanCam instrument, with mean time 2008 March 20.254 UT (1.47 hr after 
the GRB).

We do not detect any object at the position of the afterglow reported by 
Tanvir et al. (GCN 7488) nor inside the XRT error circle (Goad et al., 
GCN 7479). Our limiting magnitude is R=22 (based on USNO-B1), consistent 
with the nearly-simultaneous measurement of Tanvir et al. (GCNs 7480, 7488).