TITLE:   GCN CIRCULAR
NUMBER:  27449
SUBJECT: IPN triangulation of GRB 200325A (short)
DATE:    20/03/26 17:15:15 GMT
FROM:    Dmitry Svinkin at Ioffe Institute  <svinkin@mail.ioffe.ru>

K. Hurley, on behalf of the IPN,

I. G. Mitrofanov, D. V. Golovin, A. S. Kozyrev, M. L. Litvak,
and A. B. Sanin, on behalf of the HEND-Odyssey GRB team,

D. Svinkin, S. Golenetskii, R. Aptekar, D. Frederiks, A. Ridnaia,
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,

A. von Kienlin, X. Zhang, A. Rau, V. Savchenko, E. Bozzo,
and C. Ferrigno, on behalf of the INTEGRAL SPI-ACS GRB team,

S. Barthelmy, J. Cummings, H. Krimm, and D. Palmer,
on behalf of the Swift-BAT team, and

W. Boynton, C. Fellows, K. Harshman, H. Enos, and R. Starr,
on behalf of the GRS-Odyssey GRB team, report:

The short-duration GRB 200325A
(Fermi-GBM detection: The Fermi GBM Team, GCN Circ. 27434;
AGILE-MCAL detection: Ursi, et al., GCN Circ. 27437;
AstroSat-CZTI detection: Gupta et al., GCN Circ. 27438;
Swift-BAT detection: DeLaunay et al., GCN Circ. 27444)
was detected by Fermi (GBM trigger 606799116), Konus-Wind,
INTEGRAL (SPI-ACS), AGILE (MCAL), AstroSat (CZTI),
Mars-Odyssey (HEND), and Swift (BAT)
at about 11912 s UT (03:18:32).
The burst was found in ground analysis of Swift (BAT) data
with very low partial coding.

We have triangulated it to a preliminary, 3 sigma error box
whose coordinates are:
  ---------------------------------------------
   RA(2000), deg                 Dec(2000), deg
  ---------------------------------------------
  Center:
    31.754 (02h 07m 01s) -31.920 (-31d 55' 14")
  Corners:
    31.301 (02h 05m 12s) -30.580 (-30d 34' 50")
    32.340 (02h 09m 22s) -32.899 (-32d 53' 58")
    32.205 (02h 08m 49s) -33.240 (-33d 14' 25")
    31.173 (02h 04m 41s) -30.931 (-30d 55' 53")
  ---------------------------------------------
The error box area is 2023 sq. arcmin, and its maximum
dimension is 2.77 deg (the minimum one is 13.6 arcmin).
The Sun distance was 41 deg.

This box may be improved.

The Swift-BAT position (GCN 27444) is consistent with the IPN localization.

A triangulation map is posted at
http://www.ioffe.ru/LEA/GRBs/GRB200325_T11908/IPN

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

[GCN OPS NOTE(11apr20): Per author's request, "GRB" was added to the Subject-line.
This will make the auto-grouping of same-object Circular operate better.]