TITLE:   GCN CIRCULAR
NUMBER:  31621
SUBJECT: IPN triangulation of GRB 220219A
DATE:    22/02/21 16:12:59 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,

A. Goldstein, M. S. Briggs, and C. Wilson-Hodge
on behalf of the Fermi GBM 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 220219A
(Fermi-GBM detection: The Fermi GBM team, GCN Circ. 31609;
BALROG localization: Kunzweiler et al.,  GCN Circ. 31610;
AGILE-MCAL detection: Ursi et al., GCN Circ. 31611)
has been detected by Fermi (GBM trigger 666962499), AGILE (MCAL),
Konus-Wind, and Mars-Odyssey (HEND), so far,
at about 40894 s UT (11:21:34).

We have triangulated it to a preliminary, 3 sigma error box
whose coordinates are:
  ---------------------------------------------
   RA(2000), deg                 Dec(2000), deg
  ---------------------------------------------
  Center:
    42.243 (02h 48m 58s) +10.588 (+10d 35' 17")
  Corners:
    43.946 (02h 55m 47s)  +6.216 ( +6d 12' 57")
    39.857 (02h 39m 26s) +17.180 (+17d 10' 49")
    39.457 (02h 37m 50s) +18.548 (+18d 32' 54")
    43.844 (02h 55m 23s)  +6.598 ( +6d 35' 54")
  ---------------------------------------------
The error box area is 2243 sq. arcmin, and its maximum
dimension is 13.1 deg (the minimum one is 3.1 arcmin).
The Sun distance was 72 deg.

This box may be improved.

The IPN localization is consistent with, but reduces the area of, the
Fermi GBM Final Real-time position (GCN Circ. 31609) and BALROG
(GCN 31610) localizations.

A triangulation map and HEALPix FITS file are posted at
http://www.ioffe.ru/LEA/GRBs/GRB220219_T40894/IPN/

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