GRB 050922A, GRB 050922
GCN Circular 4014
Subject
GRB 050922A: Analysis of Swift/XRT TOO observation
Date
2005-09-22T21:56:40Z (21 years ago)
From
Jamie A. Kennea at PSU/Swift-XRT <kennea@astro.psu.edu>
J. A. Kennea, D. N. Burrows (PSU) and N. Gehrels (GSFC) report on behalf
of the Swift/XRT Team:
Swift began a target of opportunity observation of the INTEGRAL discovered
burst GRB 050922A (GCN 4007) at 15:21:21 UT on September 22nd, 2005.
Analysis of ground processed XRT data reveals no point source inside the
INTEGRAL error circle. We estimate a 90% confidence level upper limit on
the X-ray flux from this burst of 3 x 10^-14 erg/s (0.5 - 10 keV).
GCN Circular 4007
Subject
Possible GRB 050922 detected by INTEGRAL
Date
2005-09-22T15:31:35Z (21 years ago)
From
Sandro Mereghetti at IASF/CNR <sandro@mi.iasf.cnr.it>
D.Gotz, S.Mereghetti (IASF, Milano) S. Shaw, N. Mowlavi, M. Beck, J.
Zurita Heras (ISDC, Versoix) and J. Borkowski (CAMK, Torun) on behalf of
the IBAS Localization Team report:
A possible GRB triggered IBAS at 13:43:18 UT with coordinates (J2000)
R.A. = 271.1541
Dec. = -32.0235
with an uncertainty of 3.5 arcmin radius (90% c.l.).
The trigger significance was below the threshold for automatic alert delivery.
A preliminary analysis shows a spectrum consistent with an X-ray flash and
a fluence (20-200 keV) is 1E-7 erg/cm^2. However, due to the position in
the galactic bulge and the soft spectrum, we cannot exclude that the
trigger is due to an uncatalogued Galactic source.
This message can be cited.