GCN Circular 4823
Subject
GRB 060223: Swift XRT Team preliminary analysis
Date
2006-02-23T21:25:26Z (18 years ago)
From
Milvia Capalbi at ISAC/ASDC <capalbi@asdc.asi.it>
M. Capalbi, M. Perri, L. Vetere (ASDC), K.L. Page (U. Leicester), J.
Kennea and D. Burrows (PSU) report on behalf of the Swift XRT team:
We have analysed the Swift XRT data from the first seven orbits
observation of GRB 060223 (Cummings et al. GCN 4813). We find an
uncatalogued fading source at the following location:
RA(J2000) = 03h 40m 49.74s
Dec(J2000) = -17d 07' 48.0"
We estimate an uncertainty of 3.7 arcseconds radius (90% containment).
This position is 44 arcsec from the BAT position and 2.6 arcsec from the
UVOT position given in GCN 4813.
The large flare in the first orbit makes determination of an afterglow
slope and extrapolation of the flux unreliable, and we will have to wait
for further data before an afterglow slope can be established.
A preliminary spectral fit to the Photon Counting mode data with an
absorbed power law gives a photon index of 1.9 � 0.3 and NH consistent
with the Galactic value (5.92E+20 cm^-2).
This circular is an official product of the Swift XRT Team.