GCN Circular 14921
Subject
GRB 130623A detected in ground analysis of Swift-BAT data
Date
2013-06-24T15:10:16Z (12 years ago)
From
Jay R. Cummings at NASA/GSFC/Swift <james.r.cummings@nasa.gov>
J. R. Cummings reports on behalf of the Swift-BAT team:
At 11:42:44.7 UTC, the time of Fermi-GBM trigger 393680570, Swift was executing a pre-
planned slew. BAT photon detection event data was recorded during this slew. In
ground analysis in a mosaic image, a significant source was found in found at RA, Dec
20.723, -77.784, which is:
RA (J2000) 01h 22m 53.5s
Dec (J2000) -77d 47m 04s
with an estimated 90% confidence radius of 4 arcmin. The burst was a long GRB with 3
distinct peaks. T90 was about 15 +/- 2 sec.
The spectrum from T0 to T0+15 sec is best fit by a simple powerlaw with a photon index
of 1.8 +/- 0.2. The fluence from T0 to T+15 was (5.4 +/- 1.1) x 10^-0.7 ergs/cm^2.
The 1-second peak flux from T+0.6 sec was 1.4 +/- 0.3 photons/cm^2/sec.
A Swift TOO request has been approved.