GCN Circular 32117

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 220524B
was detected by Konus-Wind, INTEGRAL (SPI-ACS),
and Mars-Odyssey (HEND) at about 57898 s UT (16:04:58).

We have triangulated it to a preliminary, 3 sigma error box
whose coordinates are:
  ---------------------------------------------
   RA(2000), deg                 Dec(2000), deg
  ---------------------------------------------
  Center:
    70.274 (04h 41m 06s) -19.486 (-19d 29' 11")
  Corners:
    70.075 (04h 40m 18s) -21.168 (-21d 10' 04")
    70.146 (04h 40m 35s) -21.193 (-21d 11' 34")
    70.452 (04h 41m 49s) -17.794 (-17d 47' 37")
    70.382 (04h 41m 32s) -17.767 (-17d 46' 01")
  ---------------------------------------------
The error box area is 840 sq. arcmin, and its maximum
dimension is 3.43 deg (the minimum one is 4.1 arcmin).
The Sun distance was 40 deg.

This box may be improved.

A triangulation map and HEALPix FITS file are posted at
http://www.ioffe.ru/LEA/GRBs/GRB220524_T57898/IPN

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