GCN Circular 5347
Subject
GRB 060719: further analysis of VLT observations
Event
Date
2006-07-19T13:14:27Z (20 years ago)
From
Daniele Malesani at SISSA-ISAS,Trieste,Italy <malesani@sissa.it>
D. Fugazza (INAF/OABr), D. Malesani (SISSA/ISAS), S. Covino (INAF/OABr),
report on behalf of the MISTICI collaboration:
We refine the analysis of our observations of GRB 060719 (Stamatikos et
al., GCN 5339) taken at the ESO VLT (Covino et al., GCN 5341).
Observations were taken between Jul 19.301 and 19.332 UT, consisting of
fifty short exposures for a total exposure time of 25 minutes.
Inside the XRT error box, only the object reported by Berger & Bonanos
(GCNs 5340, 5342) is visible in our images. This object is present in
the DSS (Covino et al., GCN 5341).
A 30-minutes low-resolution spectrum identifies the object as a
foreground star, thanks to the identification of Balmer lines, CaII, SII
and NaD features in absorption at redshift 0.
There are two further objects very close to the XRT error circle
(equinox J2000):
1: alpha = 01:13:43.44, delta = -48:22:58.2
2: alpha = 01:13:43.68, delta = -38:22:51.3
These objects lie 5.2 and 4.4" arcsec away the XRT position,
respectively, and are both pointlike and fainter than the DSS limit.
Object 2 is very faint in our images.
All objects are constant within the errors during the course of our
observation (~23 to 68 minutes after the trigger). We estimate the
3-sigma limiting magnitude of our images to be R ~ 25.5 (based on
USNO-B1 R1 magnitudes).
We acknowledge the excellent support of the VLT staff, in particular
Elena Mason.
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