TITLE:   GCN CIRCULAR
NUMBER:  32108
SUBJECT: IPN triangulation of GRB 220522B
DATE:    22/05/24 18:37:10 GMT
FROM:    Dmitry Svinkin at Ioffe Institute  <svinkin@mail.ioffe.ru>

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

D. Svinkin, D. Frederiks, A. Ridnaia, 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:

The long-duration GRB 220522B
was detected by Konus-Wind, INTEGRAL (SPI-ACS),
and Mars-Odyssey (HEND) at about 1058 s UT (00:17:38).

We have triangulated it to a preliminary, 3 sigma error box
whose coordinates are:
  ---------------------------------------------
   RA(2000), deg                 Dec(2000), deg
  ---------------------------------------------
  Center:
    43.717 (02h 54m 52s)  -3.789 ( -3d 47' 19")
  Corners:
    43.363 (02h 53m 27s)  -9.058 ( -9d 03' 28")
    43.540 (02h 54m 10s)  -9.308 ( -9d 18' 30")
    43.256 (02h 53m 01s)  +4.344 ( +4d 20' 39")
    42.925 (02h 51m 42s)  +5.219 ( +5d 13' 08")
  ---------------------------------------------
The error box area is 2.77 sq. deg, and its maximum
dimension is 14.54 deg (the minimum one is 11.88 arcmin).
The Sun distance was 22 deg.

This box may be improved.

A triangulation map and HEALPix FITS file are posted at
http://www.ioffe.ru/LEA/GRBs/GRB220522_T01058/IPN/

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