GCN Circular 2777
Subject
GRB041006 (=HETE3570): optical observations
Date
2004-10-07T03:03:23Z (20 years ago)
From
Patrizia Ferrero at IASF/CNR,Bologna <ferrero@bo.iasf.cnr.it>
P. Ferrero (IASF/CNR, Bologna; Osservatorio e Universita' di Teramo),
C. Bartolini, G. Greco, A. Guarnieri, A. Piccioni (Universita' di Bologna),
E. Mazzotti Epifani (INAF, Oss. di Capodimonte - Napoli), R. Gualandi
(INAF, Bologna Observatory) and G. Pizzichini (IASF/CNR, Bologna) report:
we observed the OT of GRB 041006 (=HETE3570) reported by Da Costa, Noel
and Price (GCN 2765).
By comparison with USNOA.2 star U0900_00213019, at R.A.= 00h 54m 43.41s
DEC.= +01d 15' 45.73", R mag=19.3 and USNOB.1 star 0912-0009780, at
R.A.= 00h 54m 43.38s DEC.= +01d 15' 45.38", I mag= 18.57 , we obtain:
mean UT filter exposure mag
Oct. 6.8393 Rc 900s 19.7
Oct. 6.8506 Rc 900s 19.7
Oct. 6.8637 Rc 900s 19.8
Oct. 6.8751 Ic 900s 19.35
Oct. 6.9627 Rc 4x900s 19.95
Magnitude errors are dominated by those on the magnitude of the
comparison star, probably ~ 0.3 mag in both filter (Monet et al. 2003,
ApJ 125, 984). The seeing was ~ 3".
Our images shall be available as soon as possible on a public directory
from where it will be possible to retrieve by sftp using the hostname:
ermione.bo.astro.it, username: publicGRB, password: GRB_bo and
directory: GRB041006.
This message may be cited.