Skip to main content
Testing. You are viewing the public testing version of GCN. For the production version, go to
Introducing Einstein Probe, Astro Flavored Markdown, and Notices Schema v4.0.0. See news and announcements

GCN Circular 14235

GRB 130216B: Fermi GBM observation
2013-02-18T04:17:03Z (11 years ago)
Vandiver Chaplin at UAH/Fermi-GBM <>
V.Chaplin (UAH) reports on behalf of the Fermi GBM Team:

"At 18:58:11.70 UT on 16 Feb 2013, the Fermi Gamma-Ray Burst Monitor
triggered and located GRB 130216B (trigger 382733894 / 130216790),
which was also located in Swift/BAT ground analysis (Cummings 2013, GCN 14226).
The GBM on-ground location is consistent with the Swift position.
The angle from the Fermi LAT boresight is 93 degrees.

The GBM light curve shows a single pulse
with a duration (T90) of about 15 s (50-300 keV).
The time-averaged spectrum from T0-2.5 s to T0+6.8 s is fit by
a power law function with an exponential high-energy cutoff.
The power law index is -1.7 +/- 0.1 and
the cutoff energy, parameterized as Epeak, is 119 +/- 16 keV.

The event fluence (10-1000 keV) in this time interval is
(4.8 +/- 0.2)E-06 erg/cm^2. The 1-sec peak photon flux measured
starting from T0+2.0 s in the 10-1000 keV band
is 15.5 +/- 0.5 ph/s/cm^2.

A Band function fits the spectrum equally well
with Epeak= 91 +/- 21 keV, alpha = -1.6 +/- 0.1 and beta = -2.2 +/- 0.2.

The spectral analysis results presented above are preliminary;
final results will be published in the GBM GRB Catalog."
Looking for U.S. government information and services? Visit