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GCN Circular 28228

Subject

IPN triangulation of GRB 200805A (short)

Date

2020-08-07T23:50:34Z (5 years ago)

From

Anna Ridnaia at Ioffe Institute <ridnaia@mail.ioffe.ru>

A. Ridnaia, 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,

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 200521A
(CALET-CGBM detection: Shimizu et al., GCN Circ. 28217Loading...
 
 ;
CGBM-SPI-ACS triangulation: Tamura et al., GCN Circ. 28219Loading...
 
 )
was detected by CALET (CGBM), Konus-Wind, and
INTEGRAL (SPI-ACS) at about 48670 s UT (13:31:10).

We have triangulated it to a preliminary, 3 sigma error arc whose
coordinates are:
  ---------------------------------------------
   RA(2000), deg                 Dec(2000), deg
  ---------------------------------------------
  Center:
  97.601 (06h 30m 24s) -31.467 (-31d 28' 01")
  Corners:
  97.403 (06h 29m 37s)  -31.623 (-31d 37' 23")
  121.103 (08h 04m 25s) -44.012 (-44d 00' 43")
  120.592 (08h 02m 22s) -43.397 (-43d 23' 49")
  97.798 (06h 31m 11s)  -31.310 (-31d 18' 36")
  84.870 (05h 39m 29s)  -13.195 (-13d 11' 43")
  84.208 (05h 36m 50s)  -12.881 (-12d 52' 52")
  ---------------------------------------------
The error arc area is 20.3 sq. deg, and its maximum
dimension is ~43.7 deg (the minimum one is ~27.6 arcmin).
The Sun distance was ~58 deg.

This arc may be improved.

A triangulation map is posted at
http://www.ioffe.ru/LEA/GRBs/GRB200805_T48670/IPN/

The Konus-Wind time history and spectrum will be given in a forthcoming
GCN Circular.