GRB 220519A

A.S. Kozyrev, D.V. Golovin, M.L. Litvak, I.G. Mitrofanov, and A.B. Sanin
on behalf of the HEND/Mars-Odyssey team,

A. Ridnaia, D. Frederiks, D. Svinkin, A. Lysenko,
and T. Cline on behalf of the Konus-Wind team,

E. Bozzo and C. Ferrigno, on behalf of the INTEGRAL SPI-ACS GRB team,

and

W. Boynton, C. Fellows, K. Harshman, H. Enos, R. Starr,
and A.S. Gardner on on behalf of the GRS-Odyssey GRB team,
report:

A short-duration GRB 220519A
has been detected by Konus-Wind, INTEGRAL (SPI-ACS),
and Mars-Odyssey (HEND), so far, at about 42339 s UT (11:45:39).

We have triangulated it to a preliminary, 3 sigma error box
whose coordinates are:
 ---------------------------------------------
  RA(2000), deg                 Dec(2000), deg
 ---------------------------------------------
 Center:
  357.784 (23h 51m 08s)  -9.720 ( -9d 43' 11")
 Corners:
  357.477 (23h 49m 54s)  -9.525 ( -9d 31' 30")
  357.634 (23h 50m 32s) -10.012 (-10d 00' 45")
  358.089 (23h 52m 21s)  -9.905 ( -9d 54' 18")
  357.931 (23h 51m 43s)  -9.420 ( -9d 25' 14")
 ---------------------------------------------
The error box area is 843 sq. arcmin, and its maximum
dimension is 43 arcmin (the minimum one is 28 arcmin).
The Sun distance was 65 deg.

This box may be improved.

A triangulation map and HEALPix FITS file are posted at
http://www.ioffe.ru/LEA/GRBs/GRB220519_T42339/IPN/

The time history and spectrum will be given in forthcoming GCN Circulars.

A.Ridnaia, D. Frederiks, A.Lysenko, D. Svinkin,
A. Tsvetkova,  M. Ulanov, and T. Cline,
on behalf of the Konus-Wind team, report:

The short-duration GRB 220519A
(IPN triangulation: Kozyrev at al., GCN Circ. 32072
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triggered Konus-Wind at T0=42339.403 s UT (11:45:39.403).

The burst light curve shows a single emission pulse,
which starts at T0-0.1 s and has a total duration of ~0.7 s.

The Konus-Wind light curve of this GRB is available at
http://www.ioffe.ru/LEA/GRBs/GRB220519_T42339/

As observed by Konus-Wind, the burst
had a fluence of 1.66(-0.02,+0.48)x10^-6 erg/cm2,
and a 16-ms peak flux, measured from T0-0.048 s,
of 6.05(-3.24,+3.66)x10^-6 erg/cm2/s
(both in the 20 keV - 10 MeV energy range).

Since the main fraction of the burst emission was detected
before the trigger, the spectral analysis was performed using
the KW 3-channel light curve data.

Modelling the KW 3-channel time-integrated spectrum
(measured from T0-0.096 s to T0+0.640 s)
by a power law with exponential cutoff model:
dN/dE ~ (E^alpha)*exp(-E*(2+alpha)/Ep),
yields alpha = -0.13(-0.35,+0.44) and Ep = 507(-77,+117) keV.

All the quoted errors are at the 68% confidence level.
All the quoted values are preliminary.