GCN Circular 8018
Subject
GRB 080723A: optical upper limit
Date
2008-07-25T14:19:30Z (17 years ago)
From
Graziella Pizzichini at IASF/CNR,Bologna <pizzichini@iasfbo.inaf.it>
F. Munz (INAF/IASF Bologna), F. Terra (Second University of Roma "Tor
Vergata"),,G. Greco, C. Bartolini, A. Guarnieri, A. Piccioni (Bologna
University), G. Pizzichini (INAF/IASF Bologna), D. Nanni (INAF/OAR and
Second University of Rome "Tor Vergata"), S. Galleti, R. Gualandi (Bologna
Observatory) report:
We observed the field of GRB 080723A (GCN 8000 Stamatikos et al.)
with the 152 cm telescope located in Loiano under clear sky conditions
(seeing~2.5").
In our 20 min exposure in the Rc filter at mean time 2008 July 23
20.62 UT we do not detect any afterglow candidate in the enhanced Swift-XRT
position (GCN 8001, Beardmore et al.).
Our 3-sigma limiting magnitude is R~20 (based on Nomad1 catalogue).
In this area there is a strong galactic extinction, A_lambda ~ 4 mag in R
from the NASA/IPAC extragalactic data base.
The image 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: GRB080723A