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TITLE:   GCN CIRCULAR
NUMBER:  22208
SUBJECT: GRB 171106A CALET Gamma-Ray Burst Monitor detection
DATE:    17/12/08 00:23:47 GMT
FROM:    Takanori Sakamoto at AGU  <tsakamoto@phys.aoyama.ac.jp>

M. Moriyama, A. Yoshida, T. Sakamoto, Y. Kawakubo, Y. Yamada,
A. Tezuka, S. Matsukawa (AGU), K. Yamaoka (Nagoya U), S. Nakahira (RIKEN),
I. Takahashi (IPMU), Y. Asaoka, S. Ozawa, S. Torii (Waseda U),
Y. Shimizu, T. Tamura (Kanagawa U), W. Ishizaki (ICRR), M. L. Cherry (LSU),
S. Ricciarini (U of Florence), A. V. Penacchioni, P. S. Marrocchesi (U of Siena)
and the CALET collaboration:

The long-duration GRB 171106A (Fermi-GBM trigger #531662214,
INTEGRAL SPI-ACS trigger #7958, Konus-Wind trigger time on 11:56:50.118) triggered
the CALET Gamma-ray Burst Monitor (CGBM) at 11:56:48.57 on 6 November 2017.
The burst signal was seen by the all CGBM instruments.

The light curve of the SGM shows several peaks.  The emission starts at T+2 sec,
peaks at T+4 sec and ends at T+13.5 sec.  The weak 2nd and 3rd peaks are visible at
T+7 sec and T+12 sec.  The T90 duration measured by the SGM data is
1.8 +- 0.2 sec (40-1000 keV).

The light curve is available at

http://yoshidalab.mydns.jp/cgbm_trigger/flight/1194004517/

The CALET data used in this analysis are provided by the Waseda CALET Operation
Center located at the Waseda University.

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TITLE:   GCN CIRCULAR
NUMBER:  22283
SUBJECT: IceCube-171106A: Konus-Wind upper limits
DATE:    17/12/25 10:45:15 GMT
FROM:    Anna Kozlova at Ioffe Institute  <ann_kozlova@mail.ioffe.ru>

A. Kozlova, S. Golenetskii, R.Aptekar, D. Frederiks, P. Oleynik,
M. Ulanov, D. Svinkin, A. Tsvetkova, A. Lysenko, and T. Cline,
on behalf of the Konus-Wind team, report:

Using Konus-Wind (KW) data, we have performed a search for
a gamma-ray transient around the time of the cosmic neutrino
candidate IceCube-171106A (2017-11-06 18:39:39.21 UT,
hereafter T0; Taboada, GCN 22105;
https://gcn.gsfc.nasa.gov/notices_amon/17569642_130214.amon)

No triggered KW event happened from ~6.7 hours before and up to ~1.8 
days
after T0. The closest waiting-mode event was ~7.7 hours before T0.
Using waiting-mode data within the interval T0  +/- 1000 s,
we found no significant (> 5 sigma) excess over the background
in both KW detectors on temporal scales from 2.944 s to 100 s in the 
80-1000 keV band.
Significant variations in the 20-80 keV band is due to activity of Swift 
J0243+61.

We estimate an upper limit (90% conf.) on the 10 keV – 10 MeV fluence
to 9.0x10^-7 erg/cm^2 for a burst lasting less than 2.944 s and having a
typical KW short GRB spectrum (an exponentially cut off power law with
alpha =-0.5 and Ep=500 keV). For a typical long GRB spectrum (the Band
function with alpha=-1, beta=-2.5, and Ep=300 keV), the corresponding
limiting peak flux is 3.1x10^-7 erg/cm^2/s (10 keV - 10 MeV, 2.944 s 
scale).

All the quoted values are preliminary.