GCN Circular 10544
Subject
GRB 100324A found in ground analysis of BAT data
Date
2010-03-24T17:57:55Z (15 years ago)
From
Jay R. Cummings at NASA/GSFC/Swift <james.r.cummings@nasa.gov>
J. R. Cummings (GSFC/UMBC) and D. M. Palmer (LANL)
on behalf of the Swift team
At 00:21:27 on March 24, 2010, Swift-BAT detected a rate increase. The
source was found onboard, but not at sufficient significance to trigger
an automated GRB followup response. A significant source was found in
ground analysis at RA, Dec 98.612, -9.735, which is:
RA (J2000) 06h 34m 26.8s
Dec (J2000) -9d 44' 6.4"
with an estimated uncertainty of 2.5 arcmin (radius, 90% containment).
The burst had multiple peaks with a T90 of about 6 seconds.
The spectrum of the burst is best fit with a simple powerlaw with a
rather soft index of 2.4 +- 0.3. The fluence in the range 15-150 keV
was 7 +- 3 x 10^-8 erg/cm^2 (68% confidence). The 1-second peak flux
from T-0.3 sec was 0.3 +- 0.1 photons/cm^2.
Because the burst was not triggered onboard, there are no automated
data products. A Swift TOO has been requested.