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 3828

GRB 050819 Swift-BAT refined analysis
2005-08-19T20:09:55Z (19 years ago)
Jay R. Cummings at NASA/GSFC/Swift <>
S. Barthelmy (GSFC), L. Barbier (GSFC), J. Cummings (GSFC/NRC),
D. Hullinger (GSFC/UMD), E. Fenimore (LANL), N. Gehrels (GSFC),
H. Krimm (GSFC/USRA), C. Markwardt (GSFC/UMD), F. Marshall (GSFC),
A. Smale (NASA HQ), D. Palmer (LANL), A. Parsons (GSFC),
T. Sakamoto (GSFC/NRC), G. Sato (ISAS), J. Tueller (GSFC)
on behalf of the Swift-BAT team:

Using the full data set from the recent telemetry downlink, we report
further analysis of Swift-BAT GRB 050819 (trigger #151131)
(De Pasquale, et al., GCN 3826).  The ground-analysis position is
RA,Dec 358.757, +24.874 (J2000) with an uncertainty of 2 arcmin
(radius, 90%, stat+sys).  This is 50 arcseconds from the XRT ground-
calculated position reported by Kennea et al. in GCN Circ. 3827.

The light curve shows a long weak peak with indistinct structure from
T-12 to T+37 seconds.  T90 is 36 +/- 4 sec.  Fitting a simple power
law over the interval from T-2 to T+34 sec, the photon index is
2.6 +/- 0.3 with a fluence of 4.2 +/- 0.8 x 10^-7 erg/cm^2 in the
15-350 keV band (90% c.l.).  The peak flux in a 1-sec wide window
starting at T+9.5 seconds is 0.46 +/- 0.14 ph/cm^2/sec (15-350 keV).
Looking for U.S. government information and services? Visit