GCN Circular 24764
Subject
GRB 190606A: Fermi GBM detection
Date
2019-06-06T18:05:00Z (5 years ago)
From
Oliver J Roberts at USRA/NASA <oliver.roberts@nasa.gov>
O.J. Roberts (USRA/NASA-MSFC), S. Poolakkil (UAH) and C. Meegan (UAH)
report on behalf of the Fermi GBM Team:
"At 01:55:07.76 UT on the 6th of June 2019, the Fermi Gamma-ray Burst
Monitor (GBM) triggered and located GRB 190606A
(trigger 581478912 / 190606080), which was also detected by AGILE
(Ursi et al. 2019, GCN 24759) and the LAT (Bissaldi et al. 2019, GCN 24761).
The GBM on-ground location is consistent with the LAT position.
The angle from the Fermi LAT boresight is 72 degrees.
The GBM light curve shows a bright short spike with a duration (T90) of
about 0.3 s (10-1000 keV). The time-averaged spectrum from T0+0 s to
T0+0.3 s is best fit by a Band function with Epeak = 1779 +/- 185 keV,
alpha = -0.95 +/- 0.02, and beta = -2.52 +/- 0.21
The event fluence (10-1000 keV) in this time interval is
(4.88 +/- 0.08)E-06 erg/cm^2. The 64-msec peak photon flux measured
starting from T0+0.6 s in the 10-1000 keV band is 118 +/- 3 ph/s/cm^2."
The spectral analysis results presented above are preliminary;
final results will be published in the GBM GRB Catalog:
https://heasarc.gsfc.nasa.gov/W3Browse/fermi/fermigbrst.html
For Fermi GBM data and info, please visit the official Fermi GBM Support Page:
https://fermi.gsfc.nasa.gov/ssc/data/access/gbm/"