TITLE:   GCN CIRCULAR
NUMBER:  5067
SUBJECT: GRB 060429: Refined IPN error box and Konus-Wind spectrum
DATE:    06/05/03 09:42:10 GMT
FROM:    Valentin Pal'shin at Ioffe Inst  <val@mail.ioffe.ru>

S. Golenetskii, R. Aptekar, E. Mazets, V. Pal'shin, and D. Frederiks
  on behalf of the Konus-Wind team,

  K.Yamaoka, M.Ohno, Y.Fukazawa, T.Takahashi, M.Tashiro, Y. Terada,
  T.Murakami, and K.Makishima on behalf of the Suzaku-WAM team,

  K. Hurley and T. Cline, on behalf of the Ulysses, Mars Odyssey,
  and Konus GRB teams,

  I. Mitrofanov, A. Kozyrev, M. Litvak, A. Sanin, V. Tret'yakov and
  A. Parshukov, on behalf of the HEND-Odyssey GRB team,

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

  D. M. Smith, R. P. Lin, J. McTiernan, R. Schwartz, C. Wigger,
  W. Hajdas, and A. Zehnder, on behalf of the RHESSI GRB team,

  A. von Kienlin, G. Lichti, A. Rau, D. Gotz, and S. Mereghetti,
  on behalf of the INTEGRAL GRB team,  report:

  The short hard GRB 060429 (Hurley et al., GCN 5039) was also
  detected by Suzaku-WAM and RHESSI, resulting in a smaller error box.


  The refined 3 sigma error box is:
  -----------------------
  RA, deg   Dec, deg (J2000)
  -----------------------
  Center:
    115.5126  -24.9525

  Corners:
    115.2478 -25.1930
    115.4979 -25.1205
    115.7763 -24.7102
    115.5271 -24.7844
  --------------------

  The error box area is 267 sq. arcmin.

  This error box may be improved.

  As observed by Konus-Wind this burst had fluence
  6.29(-2.69,+0.64)x10^-6 erg/cm2,
  and the 16-ms peak flux measured from T0+0.012 s
  1.07(-0.47,+0.16)x10^-4  erg/cm2/s
  (both in the 20 keV - 5 MeV energy range).

  The spectrum integrated over the most intense part
  of the burst (from T0 to T0+0.064 s) is well
  fitted (in the 20 keV - 5 MeV range)
  by a power law with exponential cutoff model:
  dN/dE ~ E^(-alpha)*exp(-E*(2-alpha)/Ep)
  with alpha = 0.638 (-0.162, +0.141)
  and Ep = 1558 (-320, +416) keV (chi2 = 18.5/26 dof).
  The Konus-Wind trigger time T0=44389.712 s UT (12:19:49.712).

  All the quoted errors are at the 90% confidence level.