GRB 190510A
GCN Circular 24552
Subject
GRB 190510A: CALET Gamma-Ray Burst Monitor detection
Date
2019-05-15T14:11:57Z (7 years ago)
From
Valentin Pal'shin at AGU <val@phys.aoyama.ac.jp>
V. Pal'shin, A. Yoshida, T. Sakamoto, S. Sugita (AGU),
Y. Kawakubo (LSU), K. Yamaoka (Nagoya U),
S. Nakahira (RIKEN), Y. Asaoka, S. Ozawa,
S. Torii (Waseda U), Y. Shimizu, T. Tamura (Kanagawa U),
N. Cannady (GSFC/UMBC), M. L. Cherry (LSU),
S. Ricciarini (U of Florence), P. S. Marrocchesi (U of Siena),
and the CALET collaboration:
The short GRB 190510A (Fermi GBM Final Real-time Localization: The Fermi
GBM team, GCN Circ. 24449; IPN triangulation: Kozlova et al.,
GCN Circ. 24497; Konus-Wind observation: Kozlova et al., GCN Circ. 24533)
triggered the CALET Gamma-ray Burst Monitor (CGBM) at 10:19:15.735 UTC
on 10 May 2019. The burst signal was seen mainly by the SGM detector.
The burst light curve shows a single multi-peaked pulse which starts at
T+0.29 sec and ends at T+0.90 sec. The T90 and T50 durations measured by
the SGM data are 0.54 +- 0.09 sec and 0.29 +- 0.07 sec (40-1000 keV),
respectively.
The ground processed light curve is available at
http://cgbm.calet.jp/cgbm_trigger/ground/1241518706/
The CALET data used in this analysis are provided by
the Waseda CALET Operation Center located at the Waseda University.
GCN Circular 24533
Subject
Konus-Wind observation of GRB 190510A
Date
2019-05-14T09:55:27Z (7 years ago)
From
Anna Kozlova at Ioffe Institute <ann_kozlova@mail.ioffe.ru>
A. Kozlova, S. Golenetskii, R. Aptekar, D. Frederiks,
M. Ulanov, D. Svinkin, A. Tsvetkova, A. Lysenko, and T. Cline
on behalf of the Konus-Wind team, report:
The short-duration GRB 190510A
(IPN triangulation: Kozlova et al., GCN 24497)
triggered Konus-Wind at T0=37156.266 s UT (10:19:16.266).
The burst light curve shows a multipeaked structure
which started at T0-0.2 s and had a total duration of ~ 0.6 s.
As observed by Konus-Wind, the burst
had a fluence of 2.36(-0.29,+0.38)x10^-6 erg/cm2,
and a 16-ms peak flux, measured from T0+0.044 s,
of 8.58(-2.57,+2.72)x10^-6 erg/cm2/s
(both in the 20 keV - 10 MeV energy range).
Since the bulk of the burst emission was detected before
the trigger, the spectral analysis was performed using
the KW 3-channel light curve data.
Modeling the KW 3-channel time-integrated spectrum
(from T0-0.220 s to T0+0.342 s)
by a power law with exponential cutoff model:
dN/dE ~ (E^alpha)*exp(-E*(2+alpha)/Ep)
yields alpha = 0.5 (-0.54,+1.01), and Ep = 574 (-93,+105) keV.
The Konus-Wind light curve of this GRB is available at
http://www.ioffe.ru/LEA/GRBs/GRB190510_T37156/
All the quoted errors are at the 68% confidence level.
All the quoted values are preliminary.
GCN Circular 24497
Subject
IPN triangulation of GRB 190510A (short)
Date
2019-05-12T07:36:44Z (7 years ago)
From
Anna Kozlova at Ioffe Institute <ann_kozlova@mail.ioffe.ru>
A. Kozlova, S. Golenetskii, R. Aptekar, D. Frederiks, D. Svinkin,
and T. Cline on behalf of the Konus-Wind team,
K. Hurley, on behalf of the IPN,
A. Goldstein, M. S. Briggs, and C. Wilson-Hodge
on behalf of the Fermi GBM team,
and
S. Barthelmy, J. Cummings, H. Krimm, and D. Palmer,
on behalf of the Swift-BAT team, report:
The short-duration GRB 190510A was detected by Fermi (GBM trigger
579176361), Konus-Wind, and Swift (BAT) at about 37156 s UT (10:19:16).
The burst was outside the coded field of view of the BAT.
We have triangulated this GRB to a Konus-GBM annulus centered at
RA(2000)=34.022 deg (02h 16m 05s) Dec(2000)=+13.078 deg (+13d 04' 42"),
whose radius is 89.425 +/- 0.966 deg (3 sigma).
The annulus is inconsistent with the GW compact binary merger candidate
event S190510g (The LIGO Scientific Collaboration and the Virgo
Collaboration GCN Circ. 24442).
This annulus may be improved.
A triangulation map is posted at
http://www.ioffe.ru/LEA/GRBs/GRB190510_T37156/IPN/
The time history and spectrum will be given in forthcoming
GCN Circulars.
GCN Circular 24449
Subject
GRB 190510A: Fermi GBM Final Real-time Localization
Date
2019-05-10T10:30:21Z (7 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 10:19:16 UT on 10 May 2019, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 190510A (trigger 579176361.043888 / 190510430).
The on-ground calculated location, using the Fermi GBM trigger data, is RA = 128.1, Dec = 33.5 (J2000 degrees, equivalent to J2000 08h 32m, 33d 30'), with a statistical uncertainty of 3.5 degrees.
The angle from the Fermi LAT boresight is 48.0 degrees.
The skymap can be found here:
http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2019/bn190510430/quicklook/glg_skymap_all_bn190510430.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/bn190510430/quicklook/glg_healpix_all_bn190510430.fit
The GBM light curve can be found here:
http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2019/bn190510430/quicklook/glg_lc_medres34_bn190510430.gif