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GCN Circular 33966

Subject
GRB 230614C: Fermi GBM Detection
Date
2023-06-15T08:25:05Z (a year ago)
From
R. Hamburg at CNRS/IJCLab <rachel.k.hamburg@gmail.com>
S. Lesage (UAH), R. Hamburg (CNRS/ICJLab) and C. Meegan (UAH) report on behalf of
the Fermi Gamma-ray Burst Monitor Team:

"At 10:10:31 UT on 14 June 2023, the Fermi Gamma-ray Burst Monitor (GBM)
triggered and located GRB 230614C (trigger 708430236/230614424) which 
was also detected by INTEGRAL SPI-ACS (trigger 10284).

The on-ground calculated location, using the Fermi GBM trigger data,
is RA = 229.21, Dec = 10.30 (J2000 degrees, equivalent to
J2000 15h 16m, +10d 18'), with a statistical uncertainty of 1.00 degree
(radius, 1-sigma containment, statistical only; there is additionally a systematic error
which we have characterized as a core-plus-tail model, with 90% of GRBs having a
3.7 deg error and a small tail suffering a larger than 10 deg systematic error
[Connaughton et al. 2015, ApJS, 216, 32]).

The angle from the Fermi LAT boresight is 108 degrees.

The GBM light curve consists of a single emission episode with a duration (T90)
of about 6.1 s (50-300 keV). The time-averaged spectrum
from T0+0.003 to T0+7.488 s is best fit by
a Band function with Epeak = 196 +/- 7 keV,
alpha = -0.50 +/- 0.04, and beta = -2.44 +/- 0.08.

The event fluence (10-1000 keV) in this time interval is
(4.04 +/- 0.06)E-05 erg/cm^2. The 1-sec peak photon flux measured
starting from T0+1.8 s in the 10-1000 keV band is 32.6 +/- 0.5 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/"
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