Skip to main content
Testing. You are viewing the public testing version of GCN. For the production version, go to
New Announcement Feature, Code of Conduct, Circular Revisions. See news and announcements

GCN Circular 3918

GRB 050904: BAT refined analysis of partial data set
2005-09-05T02:46:12Z (19 years ago)
Jay R. Cummings at NASA/GSFC/Swift <>
D. Palmer (LANL), L. Barbier (GSFC), S. Barthelmy (GSFC),
J. Cannizzo (GSFC-UMBC), J. Cummings (GSFC/NRC), D. Hullinger (GSFC/UMD),
E. Fenimore (LANL), N. Gehrels (GSFC), H. Krimm (GSFC/USRA),
C. Markwardt (GSFC/UMD), A. Parsons (GSFC), T. Sakamoto (GSFC/NRC),
G. Sato (ISAS), M. Tashiro (Saitama U.), J. Tueller (GSFC)
on behalf of the Swift-BAT team:

Using only a small amount of the full data set from recent telemetry
downlinks, we report further analysis of Swift-BAT Trigger #153514
(Cummings, et al., GCN 3910).  Due to a large backlog in data downlinking,
we have only the data from T-40 to T+120 sec.  We do not expect the full
data set for at least another 2 days, so we are issuing this partial report.
The ground-analysis position is RA,Dec 13.722,14.081 {0h54m53s, 14d04'52"}
(J2000) with an uncertainty of 2.6 arcmin (radius, 90%, stat+sys).
This is 3.9 arcmin from the onboard position and 0.54 arcmin from the
IR afterglow position reported by Haislip et al.  in GCN Circ. 3913.

This is a long burst with T90 greater than 120 sec.  The burst started
at T+0 sec with continued emission past T+120 sec (where the downlinked
data stops).
Looking for U.S. government information and services? Visit