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 24692

GRB 190530A: Fermi GBM observation
2019-05-31T09:31:51Z (5 years ago)
Elisabetta Bissaldi at INFN,Bari <>
E. Bissaldi (Politecnico & INFN Bari) and C. Meegan (UAH)
report on behalf of the Fermi GBM Team:

"At 10:19:08.90 UT on 30 May 2019, the Fermi
Gamma-Ray Burst Monitor (GBM) triggered and located
GRB 190530A (trigger 580904353 / 190530430, GCN #24676),
which was also detected by AGILE-MCAL (GCN # 24678) and
Fermi-LAT (GCN # 24679).

The GBM light curve consists of multiple bright peaks
with a duration (T90) of about 18.4 s (50-300 keV).

The time-averaged spectrum from T0 to T0+20 s is
adequately fit by a Band function with Epeak = 900 +/- 10 keV,
alpha = -1.00 +/- 0.01, and beta = -3.64 +/- 0.12.

The event fluence (10-1000 keV) in this time interval
is (3.72 +/- 0.01)E-04 erg/cm^2.
The 1-sec peak photon flux measured starting from T0+16.4 s
in the 10-1000 keV band is 160.5 +/- 0.7 ph/s/cm^2.

The spectral analysis results presented above are preliminary;
final results will be published in the GBM GRB Catalog:

For Fermi GBM data and info, please visit the official
Fermi GBM Support Page:"
Looking for U.S. government information and services? Visit