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TITLE:   GCN CIRCULAR
NUMBER:  26256
SUBJECT: GRB 191118A: Fermi GBM Final Real-time Localization
DATE:    19/11/18 22:19:53 GMT
FROM:    Fermi GBM Team at MSFC/Fermi-GBM  <do_not_reply@GIOC.nsstc.nasa.gov>

The Fermi GBM team reports the detection of a likely LONG GRB

At 22:12:01 UT on 18 Nov 2019, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 191118A (trigger 595807926.820754 / 191118925).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 214.0, Dec = -48.4 (J2000 degrees, equivalent to J2000 14h 16m, -48d 23'), with a statistical uncertainty of 2.2 degrees.

The angle from the Fermi LAT boresight is 105.0 degrees.

The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2019/bn191118925/quicklook/glg_skymap_all_bn191118925.png

The HEALPix FITS file, including the estimated localization systematic, can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2019/bn191118925/quicklook/glg_healpix_all_bn191118925.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2019/bn191118925/quicklook/glg_lc_medres34_bn191118925.gif

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TITLE:   GCN CIRCULAR
NUMBER:  26257
SUBJECT: GRB 191118A: BALROG localization (Fermi Trigger 595807926 / GRB 191118925)
DATE:    19/11/18 22:33:53 GMT
FROM:    Jochen Greiner at MPE,Garching  <jcg@mpe.mpg.de>

F. Kunzweiler, B. Biltzinger, F. Berlato, J. Burgess & J. Greiner (all MPE Garching) report:

The public trigdat data of the Fermi Gamma-ray Burst Monitor (GBM) trigger
595807926 at 22:12:01 on 18 Nov. 2019 were automatically fitted for spectrum
and sky location with BALROG (Burgess et al. 2018, MNRAS 476, 1427;
Berlato et al. 2019, ApJ 873, 60).

The best-fit position (1 sigma statistical errors) is:
RA(2000.0) = 218.5+/-6.0 deg
Decl.(2000.0) = -49.3+/-3.3 deg
We estimate an additional systematic error of 1 deg.

Further details are available at:
https://grb.mpe.mpg.de/grb/GRB191118925/

The Healpix map can be downloaded from:
https://grb.mpe.mpg.de/grb/GRB191118925/healpix

The location parameters are available as JSON at:
https://grb.mpe.mpg.de/grb/GRB191118925/json

                        

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TITLE:   GCN CIRCULAR
NUMBER:  26278
SUBJECT: GRB 191118A: Insight-HXMT/HE detection
DATE:    19/11/23 02:46:16 GMT
FROM:    YaoGuang Zheng at IHEP  <zhengyg@ihep.ac.cn>

Y. G. Zheng, C. Cai, Q. Luo, S. Xiao, Q. B. Yi, 
Y. Huang, C. K. Li, G. Li, X. B. Li, J. Y. Liao, S. L. Xiong,
C. Z. Liu, X. F. Li, Z. W. Li, Z. Chang, A. M. Zhang, 
Y. F. Zhang, X. F. Lu, C. L. Zou (IHEP), Y. J. Jin, 
Z. Zhang (THU), T. P. Li (IHEP/THU), F. J. Lu, L. M. Song, 
M. Wu, Y. P. Xu, S. N. Zhang (IHEP), 
report on behalf of the Insight-HXMT team:

At 2019-11-18T22:12:01.82 (T0), Insight-HXMT/HE detected 
GRB 191118A (trigger ID: HEB191118925) in a routine search of the data, 
which was also triggered by Fermi/GBM (GCN #26256).

The Insight-HXMT/HE light curve mainly consists of a single  
pulse with a duration (T90) of 15.71 s measured from T0+0.12 s. 
The 1-ms peak rate, measured from T0+7.85 s, is 928 cnts/sec. 
The total counts from this burst is 7570 counts. 
URL_LC: http://www.hxmt.org/images/GRB/HEB191118925_lc.jpg 

All measurements above are made with the CsI detectors operating in the 
regular mode with the energy range of about 80-800 keV (deposited energy). 
Only gamma-rays with energy greater than about 200 keV can penetrate 
the spacecraft and leave signals in the CsI detectors installed inside 
of the telescope. 

Insight-HXMT is the first Chinese space X-ray telescope, which was 
funded jointly by the China National Space Administration (CNSA) and 
the Chinese Academy of Sciences (CAS). 
More information about it could be found at: 
http://www.hxmt.org.