GCN Circular 3678
Subject
GRB 050724: SWIFT XRT refined position
Event
Date
2005-07-25T23:46:41Z (21 years ago)
From
Angelo Antonelli at Obs. Astro. di Roma <a.antonelli@mporzio.astro.it>
L.A. Antonelli (INAF/OAR), P. Romano, A. Moretti, S. Covino (INAF/OAB),
D. Burrows (PSU) on behalf of the SWIFT XRT Team report:
We have analyzed the first 20 ksec of the Swift XRT observation of GRB
050724 (GCN 3665, Covino et al.). We derived a refined position of the
X-ray afterglow
by performing a boresight correction based on the USNO catalog. The new
coordinates of the X-ray afterglow are: RA(J2000) = 16h 24m 44.8s,
Dec (J2000) = -27d 32' 31.8" with an uncertainty of 5.4 arcseconds
radius (3 sigma). This position is 69 arcseconds from the refined BAT
position given in GCN 3667 (H. Krimm et al), 2.6 arcseconds from the
XRT position given in GCN 3665 and 7.1 arcseconds from the XRT position
given in GCN 3669 (Romano et al.).
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