TITLE:   GCN CIRCULAR
NUMBER:  32220
SUBJECT: IPN triangulation of GRB 220617A (short)
DATE:    22/06/18 18:02:34 GMT
FROM:    Anna Ridnaia at Ioffe Institute  <ridnaia@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,

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

A. Goldstein, M. S. Briggs, and C. Wilson-Hodge
on behalf of the Fermi GBM 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 short-duration GRB 220617A
(Fermi-GBM detection: Fermi GBM Team, GCN Circ 32209;
Fermi-LAT detection: Di Lalla et al., GCN Circ 32212)
has been detected by Fermi (GBM trigger 677183477),
INTEGRAL (SPI-ACS), Konus-Wind, and Mars-Odyssey (HEND),
so far, at about 66669 s UT (18:31:09).

We have triangulated it to a preliminary, 3 sigma error box
whose coordinates are:
---------------------------------------------
  RA(2000), deg                 Dec(2000), deg
 ---------------------------------------------
 Center:
  156.882 (10h 27m 32s) +15.600 (+15d 36' 01")
 Corners:
  157.351 (10h 29m 24s) +16.445 (+16d 26' 41")
  157.423 (10h 29m 41s) +16.807 (+16d 48' 25")
  156.369 (10h 25m 29s) +14.606 (+14d 36' 21")
  156.247 (10h 24m 59s) +14.082 (+14d 04' 54")
 ---------------------------------------------
The error box area is 867 sq. arcmin, and its maximum
dimension is 2.9 deg (the minimum one is 5.8 arcmin).
The Sun distance was 66 deg.

This box may be improved.

A triangulation map and HEALPix FITS file are posted at
http://www.ioffe.ru/LEA/GRBs/GRB220617_T66669/IPN

The Fermi-LAT localization was covered by Swift ToO (GCN Circ 32215)
but none of the X-ray sources detected are inside the box.

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