TITLE:   GCN CIRCULAR
NUMBER:  43769
SUBJECT: IPN triangulation of GRB 260212A
DATE:    26/02/17 12:10:47 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. Lysenko, A. Ridnaia,
and T. Cline on behalf of the Konus-Wind team,

A. Goldstein, M. S. Briggs, C. Wilson-Hodge,
and E. Burns on behalf of the Fermi-GBM team,

S. Barthelmy, J. Cummings, H. Krimm, D. Palmer, A. Tohuvavohu,
and J. DeLaunay on behalf of the Swift-BAT 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 260212A
(Ferm-GBM detection: The Fermi GBM team, GCN 43716;
Neights and Meegan GCN 43740;
Glowbug detection: Cheung et al., GCN 43719;
SVOM-GRM detection: Zhang et al., GCN 43727;
GECAM-B detection: Zhang et al., GCN 43736;
AstroSat-CZTI detection: Salunke et al., GCN 43741)
was detected by Fermi (GBM trigger 792611353), Swift (BAT),
Konus-Wind, Glowbug, SVOM (GRM), GECAM-B, Astrosat (CZTI),
and Mars-Odyssey (HEND) at about 64148 s UT (17:49:08)
The burst was outside the coded field of view of the BAT.

We have triangulated it to a preliminary, 3 sigma error box
whose coordinates are:
---------------------------------------------
  RA(2000), deg                 Dec(2000), deg
 ---------------------------------------------
 Center:
  224.837 (14h 59m 21s) +74.800 (+74d 47' 59")
 Corners:
  225.022 (15h 00m 05s) +76.212 (+76d 12' 45")
  224.790 (14h 59m 09s) +73.505 (+73d 30' 18")
  224.644 (14h 58m 35s) +73.384 (+73d 23' 04")
  224.855 (14h 59m 25s) +76.092 (+76d 05' 30")
 ---------------------------------------------
The error box area is 372 sq. arcmin, and its maximum
dimension is 2.830 deg (the minimum one is 2.3 arcmin).
The Sun distance was 106 deg.

This localization may be improved.

A triangulation map and HEALPix FITS file are posted at
http://www.ioffe.ru/LEA/GRBs/GRB260212_T64149/IPN/
The HEALPix triangulation map is the multi-order HEALPix in units of
probability density.

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