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GRB 190724A

GCN Circular 25142

Subject

GRB 190724A: Fermi GBM Final Real-time Localization

Date

2019-07-24T00:55:40Z (6 years ago)

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 SHORT GRB

At 00:43:56 UT on 24 Jul 2019, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 190724A (trigger 585621841.792286 / 190724031).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 170.4, Dec = 15.2 (J2000 degrees, equivalent to J2000 11h 21m, 15d 11'), with a statistical uncertainty of 13.6 degrees.

The angle from the Fermi LAT boresight is 36.0 degrees.

The skymap can be found here:
http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2019/bn190724031/quicklook/glg_skymap_all_bn190724031.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/bn190724031/quicklook/glg_healpix_all_bn190724031.fit

The GBM light curve can be found here:
http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2019/bn190724031/quicklook/glg_lc_medres34_bn190724031.gif

GCN Circular 25146

Subject

IPN triangulation of GRB 190724A (short)

Date

2019-07-24T19:53:13Z (6 years ago)

From

Anna Kozlova at Ioffe Institute <ann_kozlova@mail.ioffe.ru>

A. Kozlova and K. Hurley, on behalf of the IPN,

A. Goldstein, M. S. Briggs, and C. Wilson-Hodge
on behalf of the Fermi GBM team,

and

A. von Kienlin, X. Zhang, A. Rau, V. Savchenko, E. Bozzo,
and C. Ferrigno, on behalf of the INTEGRAL SPI-ACS GRB team,
report:

The short-duration GRB 190724A has been detected
by Fermi (GBM trigger 585621841) and INTEGRAL (SPI-ACS), so far,
at about 2637 s UT (00:43:57).

We have triangulated this GRB to a GBM-INTEGRAL annulus centered at
RA(2000)=206.373 deg (13h 45m 29s)  Dec(2000)=+50.590 deg (+50d 35' 22"),
whose radius is 51.149 +/- 3.567 deg (3 sigma).

This annulus is consistent with, but reduces the area of, the Fermi GBM
localization (The Fermi GBM team, GCN Circ. 25142Loading...
 
 )

This annulus may be improved.

A triangulation map is posted at
http://www.ioffe.ru/LEA/GRBs/GRB190724_T02636/IPN/

GCN Circular 25150

Subject

GRB 190724A: Insight-HXMT/HE detection

Date

2019-07-25T09:46:18Z (6 years ago)

From

Ce Cai at IHEP <caice@ihep.ac.cn>

C. Cai, Q. Luo, S. Xiao, Q. B. Yi, Y. G. Zheng, Y. Huang, 
C. K. Li, X. B. Li, G. 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 2019-07-24T00:43:56.750 (T0), Insight-HXMT/HE detected 
GRB 190724A (trigger ID: HEB190724030) in a routine search of the data, 
which was also triggered by Fermi/GBM (GCN #25142Loading...
 
 ). 

The Insight-HXMT/HE light curve mainly consists of a single  
pulse with a duration (T90) of 0.06 s measured from T0+0.01 s. 
The 1-ms peak rate, measured from T0+0.02 s, is 10765 cnts/sec. 
The total counts from this burst is 634 counts. 
URL_LC: http://www.hxmt.org/images/GRB/HEB190724030_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.