GRB 141029B
GCN Circular 16987
Subject
GRB 141029B: Fermi GBM detection
Date
2014-10-29T17:29:02Z (11 years ago)
From
Oliver Roberts at UCD/Fermi <oliver.roberts@ucd.ie>
O.J. Roberts (UCD) reports on behalf of the Fermi GBM Team:
"At 03:13:18.62 UT on the 29th October 2014, the Fermi Gamma-Ray
Burst Monitor triggered and located GRB 141029B
(trigger 436245201 / 141029134). The trigger resulted in an
Autonomous Repoint Request (ARR) that was accepted and the
spacecraft slewed to the GBM in-flight location.
The on-ground calculated location, using the GBM trigger
data, is RA = 105.2, DEC = +25.1, with an uncertainty
of 1.0 degrees (radius, 1-sigma containment,
statistical only; there is additionally a systematic
error which is currently estimated to be 2 to 3 degrees).
The angle from the Fermi LAT boresight is about 42 degrees.
The GBM light curve consists of a multiple episodes with a
duration (T90) of about 202.4 s (50-300 keV). The time-averaged
spectrum from T0-12.2 s to T0+190.5 s is well fit
by a power law function with an exponential high-energy cutoff.
The power law index is -1.36 +/- 0.03 and the cutoff energy,
parameterised as Epeak, is 191 +/-13 keV.
The event fluence (10-1000 keV) in this time interval is
(3.800 +/- 0.10)E-05 erg/cm^2. The 1-sec peak photon flux
measured starting from T0+78.3 s in the 10-1000 keV band
is 20.3 +/- 0.4 ph/s/cm^2.
The spectral analysis results presented above are preliminary;
final results will be published in the GBM GRB Catalog."
GCN Circular 16988
Subject
IPN triangulation of GRB 141029B
Date
2014-10-29T23:05:18Z (11 years ago)
From
Kevin Hurley at UCBerkeley/SSL <khurley@ssl.berkeley.edu>
K. Hurley, on behalf of the IPN,
J. Goldsten, on behalf of the MESSENGER NS GRB team,
A. von Kienlin, X. Zhang, A. Rau, V. Savchenko, E. Bozzo, and C.
Ferrigno, on behalf of the INTEGRAL SPI-ACS GRB team, and
V. Connaughton, M. S. Briggs, C. Meegan, and V. Pelassa, on behalf of the Fermi
GBM team, report:
GRB 141029B (Roberts et al. GCN 16987) was also observed by INTEGRAL
(SPI-ACS) and MESSENGER, so far. We have triangulated it to a preliminary,
3 sigma annulus, whose coordinates are RA (center), Dec (center), radius=
16.850, +5.225, 87.104 +/- 0.259 degrees. This annulus intersects the
GBM 1 sigma (statistical-only) error circle at two points:
RA(deg) Dec(deg)
105.735 +24.226
105.874 +25.894
to form an error box whose area is approximately 0.56 sq. deg.
This triangulation may be improved.
A map has been posted at ssl.berkeley.edu/ipn3/141029B