GCN Circular 4776
Subject
GRB 060218: Swift XRT Position
Date
2006-02-18T10:49:54Z (19 years ago)
Edited On
2025-04-09T18:44:56Z (12 days ago)
From
Giancarlo Cusumano at INAF-IASFA <cusumano@pa.iasf.cnr.it>
Edited By
Judith Racusin at NASA/GSFC <judith.racusin@nasa.gov> on behalf of Tyler Barna at University of Minnesota <tylerpbarna@gmail.com>
J. A. Kennea, D. N. Burrows (PSU), G. Cusumano (INAF-Pa), and G.
Tagliaferri (INAF-OAB) report on behalf of the Swift XRT team:
The Swift XRT observed the position of GRB 060218 (Cusumano et al., GCN
4775) beginning at 03:37:04 UT, 153 s after the BAT trigger. The
on-board centroiding algorithm did not find a source. Ground-processing
of the data was delayed, but we have now partially analyzed data from
the first two orbits, using Level 0 data from the MOC. The XRT was in
Windowed Timing mode for the entire first orbit and therefore no
position is available from that orbit. The XRT switched into PC mode
during the second orbit, during which we clearly detect a bright, fading
point source located at:
RA(J2000): 03h 21m 39.7s
Dec(J2000): 16d 52' 01.33"
We estimate the uncertainty to be about 5 arcseconds (90% confidence
radius). This position lies 39 arcseconds from the BAT position reported
in GCN 4775. A full analysis of the XRT data will follow.
This circular is an official product of the Swift XRT Team.