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 33194

GRB 230116D: Swift-BAT refined analysis
2023-01-18T22:24:27Z (a year ago)
Sibasish Laha at GSFC <>
C. B. Markwardt (GSFC),S. D. Barthelmy (GSFC),
H. A. Krimm (NSF), S. Laha (GSFC/UMBC),
A. Y. Lien (U Tampa), D. M. Palmer (LANL),
T. Parsotan (GSFC/UMBC),T. Sakamoto (AGU),
M. Stamatikos (OSU) (i.e. the Swift-BAT team):

Using the data set from T-240 to T+962 sec from the recent telemetry downlink,
we report further analysis of BAT GRB 230116D (trigger #1149293)
(Sonbas et al., GCN Circ. 33176).  The BAT ground-calculated position is
RA, Dec = 98.584, 49.831 deg which is
   RA(J2000)  =  06h 34m 20.1s
   Dec(J2000) = +49d 49' 50.3"
with an uncertainty of 2.9 arcmin, (radius, sys+stat, 90% containment).
The partial coding was 98%.

The BAT light curve showed a complex structure with a duration of about 40 sec.
T90 (15-350 keV) is 41.00 +- 11.18 sec (estimated error including systematics).

The time-averaged spectrum from T+1.14 to T+53.144 sec is best fit by a simple
power-law model.  The power law index of the time-averaged spectrum is
1.38 +- 0.22.  The fluence in the 15-150 keV band is 8.12 +- 1.2 x 10^-07 erg/cm2.
The 1-sec peak photon flux measured from T+12.14 sec in the 15-150 keV band
is 0.6 +- 0.2 ph/cm2/sec.  All the quoted errors are at the 90% confidence

The results of the batgrbproduct analysis are available at
Looking for U.S. government information and services? Visit