[vsnet-grb-info 25281] IPN triangulation of GRB 200311A

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  27381
SUBJECT: IPN triangulation of GRB 200311A
DATE:    20/03/13 12:49:49 GMT
FROM:    Dmitry Svinkin at Ioffe Institute  <svinkin at mail.ioffe.ru>

IPN triangulation of GRB 200311A

D. Svinkin, S. Golenetskii, R. Aptekar, D. Frederiks, A. Ridnaia,
and T. Cline on behalf of the Konus-Wind team,

K. Hurley, on behalf of the IPN,

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

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

The long-duration GRB 200311A
(Fermi-GBM detection: The Fermi GBM team, GCN Circ. 27363;
AGILE-MCAL detection: Ursi et al., GCN Circ. 27365;
AstroSat-CZTI detection: Gupta et al., GCN Circ. 27371)
was detected by Fermi (GBM trigger  605632577), Konus-Wind,
INTEGRAL (SPI-ACS), AGILE-MCAL, and AstroSat-CZTI
at about 54973 s UT (15:16:13).

We have triangulated it to a preliminary, 3 sigma error box
whose coordinates are:
---------------------------------------------
   RA(2000), deg                 Dec(2000), deg
  ---------------------------------------------
  Center:
   209.245 (13h 56m 59s) -50.054 (-50d 03' 15")
  Corners:
   206.898 (13h 47m 35s) -52.496 (-52d 29' 46")
   211.898 (14h 07m 35s) -47.578 (-47d 34' 42")
   211.296 (14h 05m 11s) -47.578 (-47d 34' 39")
   206.215 (13h 44m 52s) -52.473 (-52d 28' 23")
  ---------------------------------------------
The error box area is 2.0 sq. deg, and its maximum
dimension is 6.1 deg (the minimum one is 21 arcmin).
The Sun distance was 117 deg.

This box may be improved.

The IPN localization is consistent with, but reduces the area of, the 
Fermi-GBM final position (GCN Circ. 27363).

A triangulation map is posted at
http://www.ioffe.ru/LEA/GRBs/GRB200311_T54974/IPN

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