GCN Circular 12904

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

K. Hurley, and J. Goldsten, on behalf of the MESSENGER NS GRB team,

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

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

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

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

The long-duration, very intense GRB 120129A was observed by Konus-Wind, 
MESSENGER (GRNS), AGILE (MCAL and SuperAGILE), Fermi (GBM), and Swift 
(BAT) at about 50146 s UT (13:55:46). The burst was outside the coded 
fields of view of the BAT and SuperAGILE.

We have triangulated it to a preliminary, 3 sigma error box whose
coordinates are:
  ---------------------------------------------
   RA(2000), deg                 Dec(2000), deg
  ---------------------------------------------
  Center:
    30.440 (02h 01m 46s) +59.282 (+59d 16' 55")
  Corners:
    23.362 (01h 33m 27s) +68.842 (+68d 50' 33")
    31.740 (02h 06m 58s) +56.353 (+56d 21' 09")
    34.401 (02h 17m 36s) +51.346 (+51d 20' 44")
    28.869 (01h 55m 29s) +62.399 (+62d 23' 58")
  ---------------------------------------------

The error box area is 2.7  sq. deg, and its maximum
dimension is 18.3 deg.

This box can be improved.

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

A triangulation map is posted at
http://www.ioffe.ru/LEA/GRBs/GRB120129_T50148/IPN/