TITLE:   GCN CIRCULAR
NUMBER:  11424
SUBJECT: IPN triangulation of bright GRB 101123A
DATE:    10/11/26 20:06:14 GMT
FROM:    Valentin Pal'shin at Ioffe Inst  <val@mail.ioffe.ru>

K. Hurley on behalf of the MESSENGER and Odyssey GRB teams,

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

S. Golenetskii, R. Aptekar, E. Mazets, V. Pal'shin, D. Frederiks, and
T. Cline, on behalf of the Konus-Wind team,

J. Goldsten on behalf of the MESSENGER GRNS GRB team,

V. Connaughton, M. Briggs, and C. Meegan, on behalf of the Fermi GBM team,

A. von Kienlin, G. Lichti, and A. Rau, on behalf of the
INTEGRAL SPI-ACS GRB team,

E. Del Monte, E. Costa, I. Donnarumma, Y. Evangelista, M. Feroci,
I. Lapshov, F. Lazzarotto, L. Pacciani, M. Rapisarda, P. Soffitta,
on behalf the SuperAGILE team,

G. Di Cocco, F. Fuschino, M. Galli, C. Labanti, and M. Marisaldi,
on behalf of the AGILE MCAL team,

and

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

Fermi (GBM), INTEGRAL (SPI-ACS), AGILE (MiniCalorimeter and
SuperAGILE), Swift (BAT), Konus-Wind, MESSENGER (GRNS), and Mars Odyssey 
(HEND) observed the bright GRB 101123A at about 22:52:14 UT (the 
Fermi/GBM trigger 312245496: Guiriec, GCN 11423). The burst was outside 
the coded fields of view of the BAT and SuperAGILE.

We have triangulated this burst to the following 3 sigma error box:
-----------------------------------------------
     RA(2000), deg              Dec(2000), deg
-----------------------------------------------
Center:
  131.381 (08h 45m 32s)   + 5.563 (+05d 33' 47")
Corners:
  130.942 (08h 43m 46s)   + 4.586 (+04d 35' 11")
  131.755 (08h 47m 01s)   + 6.277 (+06d 16' 35")
  131.827 (08h 47m 18s)   + 6.584 (+06d 35' 02")
  131.011 (08h 44m 03s)   + 4.873 (+04d 52' 23")
-----------------------------------------------

The error box area is 433 sq. arcmin.
The maximum distance between the box corners is 2.2 deg.
This error box may be improved.

A map is posted at http://ssl.berkeley.edu/ipn3/101123A
showing the GBM best-fit position (blue star), and the IPN annuli (solid
lines with centers dot-dashed).