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GCN Circular 32163

Subject
IPN triangulation of GRB 220601A (long)
Date
2022-06-04T13:39:20Z (a year ago)
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,

S. Xiao, S.-L. Xiong, X.-Q. Li, X.-Y. Wen, L.-M. Song, S.-J. Zheng,
W.-X. Peng, and F. Zhang on behalf of the GECAM 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 220601A
was detected by Konus-Wind, INTEGRAL (SPI-ACS), GECAM-B,
and Mars-Odyssey (HEND) at about 22766 s UT (06:19:26).

We have triangulated it to a preliminary, 3 sigma error box
whose coordinates are:
  ---------------------------------------------
   RA(2000), deg                 Dec(2000), deg
  ---------------------------------------------
  Center:
   224.703 (14h 58m 49s) -47.978 (-47d 58' 41")
  Corners:
   221.059 (14h 44m 14s) -50.313 (-50d 18' 48")
   221.153 (14h 44m 37s) -50.501 (-50d 30' 02")
   227.990 (15h 11m 58s) -45.375 (-45d 22' 31")
   227.888 (15h 11m 33s) -45.177 (-45d 10' 37")
  ---------------------------------------------
The error box area is 1.2 sq. deg, and its maximum
dimension is 7.0 deg (the minimum one is 11 arcmin).
The Sun distance was 144 deg.

This box may be improved.

A triangulation map and HEALPix FITS file are posted at
http://www.ioffe.ru/LEA/GRBs/GRB220601_T22766/IPN/

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