GRB 190726A

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

At 15:24:53 UT on 26 Jul 2019, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 190726A (trigger 585847498.610468 / 190726642).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 310.3, Dec = 34.3 (J2000 degrees, equivalent to J2000 20h 41m, 34d 17'), with a statistical uncertainty of 1.2 degrees.

The angle from the Fermi LAT boresight is 72.0 degrees.

The skymap can be found here:
http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2019/bn190726642/quicklook/glg_skymap_all_bn190726642.png

The HEALPix FITS file, including the estimated localization systematic, can be found here:
http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2019/bn190726642/quicklook/glg_healpix_all_bn190726642.fit

The GBM light curve can be found here:
http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2019/bn190726642/quicklook/glg_lc_medres34_bn190726642.gif

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

The public trigdat data of the Fermi Gamma-ray Burst Monitor (GBM) trigger
585847498 at 15:24:53 on 26 July 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) = 310.8+/-0.9 deg
Decl.(2000.0) = 34.9+/-1.2 deg
We estimate an additional systematic error of 2 deg.

Further details are available at:
https://grb.mpe.mpg.de/grb/GRB190726642/

The Healpix map can be downloaded from:
https://grb.mpe.mpg.de/grb/GRB190726642/healpix

The location parameters are available as JSON at:
https://grb.mpe.mpg.de/grb/GRB190726642/json

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 2019-07-26T15:24:59.20 (T0), Insight-HXMT/HE detected 
GRB 190726A (trigger ID: HEB190726642) in a routine search of the data, 
which was also triggered by Fermi/GBM (GCN #25154
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 ).

The Insight-HXMT/HE light curve mainly consists of a single  
pulse with a duration (T90) of 2.94 s measured from T0-2.19 s. 
The 1-ms peak rate, measured from T0-1.91 s, is 1319 cnts/sec. 
The total counts from this burst is 3047 counts. 
URL_LC: http://www.hxmt.org/images/GRB/HEB190726642_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.