TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  1639
SUBJECT: IPN triangulation of GRB021016 (small error box)
DATE:    02/10/16 22:06:48 GMT
FROM:    Kevin Hurley at UCBerkeley/SSL  <khurley@sunspot.ssl.berkeley.edu>

K. Hurley and T. Cline, on behalf of the Ulysses and  HETE GRB teams, and

G. Ricker, J-L Atteia, N. Kawai, D. Lamb, S. Woosley, J. Doty, R. Vanderspek, 
J. Villasenor, G. Crew, G. Monnelly, N. Butler, J.G. Jernigan, A. Levine, 
F. Martel, E. Morgan, G. Prigozhin, J. Braga, R. Manchanda, G. Pizzichini,
Y. Shirasaki, C. Graziani, M. Matsuoka, T. Tamagawa, K. Torii,
T. Sakamoto, A. Yoshida, E. Fenimore, M. Galassi, T. Tavenner, T. Donaghy,
M. Boer, J-F Olive, and J-P Dezalay, on behalf of the HETE GRB team, report:

Ulysses and HETE-FREGATE observed this GRB at 37740 seconds (HETE
2397).  As observed by Ulysses, it had a duration of approximately 50
seconds, a 25-100 keV fluence of approximately  3.7E-6 erg/cm2, and a
peak flux of approximately  3.8E-07 erg/cm2 s over 0.50 seconds.

We have triangulated it to a preliminary, 3 sigma annulus centered at
RA, Decl= 357.102, -36.223 degrees, whose radius is 83.633 +/- 0.057
degrees.  This annulus intersects the one-dimensional HETE WXM error
box (GCN/HETE Burst Position Notice, Sequence Number 4) to form an
error box whose approximate area is 50 sq. arcmin. and whose coordinates are:

    RA(2000)                              DEC(2000)

 ERROR BOX CENTER:    0 h 33 m 43.62 s  46 o 47 ' 16.00 " 
 ERROR BOX CORNER 1:  0 h 31 m 42.34 s  46 o 54 ' 04.11 "
 ERROR BOX CORNER 2:  0 h 32 m 47.71 s  46 o 45 ' 23.28 " 
 ERROR BOX CORNER 3:  0 h 34 m 39.74 s  46 o 49 ' 13.78 "
 ERROR BOX CORNER 4:  0 h 35 m 44.71 s  46 o 40 ' 25.61 "

This error may be improved.