GRB 021025
GCN Circular 1663
Subject
IPN triangulation of GRB021025 (portion of annulus)
Date
2002-10-29T17:34:48Z (23 years ago)
From
Kevin Hurley at UCBerkeley/SSL <khurley@sunspot.ssl.berkeley.edu>
K. Hurley and T. Cline, on behalf of the Ulysses, Konus, and HETE GRB
teams,
E. Mazets and S. Golenetskii, on behalf of the Konus-Wind 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, 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:
Konus and RHESSI also observed this event (GCN 1656). The Konus
ecliptic latitude response limits the IPN annulus (RA, Decl=178.652,
+35.689 degrees, radius 73.524 +/- 0.111 degrees, 3 sigma) to the
portion in the south ecliptic hemisphere, that is, the portion between
RA, Decl = 92.5, +23.4 and 231.0, -18.5 degrees. The 3-spacecraft
triangulation indicates that the most likely position along this
portion of the annulus is very roughly located at RA, Decl= 115.6, -7.8
degrees.
This error box may be improved slightly, but as the event was
not observed by MO, a small error box cannot be derived for it.
GCN Circular 1656
Subject
IPN triangulation of GRB021025 (annulus)
Date
2002-10-26T01:37:30Z (23 years ago)
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 burst at 73109 s.
As observed by Ulysses, it had a duration ~10 s, a 25-100 keV
fluence of ~1E-6 erg/cm2, and a peak flux over 0.25 s of
~5E-7 erg/cm2 s. We have triangulated it to a preliminary
annulus centered at RA, Decl=178.652, +35.689 degrees, with
radius 73.524 +/- 0.111 degrees (3 sigma).
At this point it is not clear whether this event was
observed by Mars Odyssey and thus whether an error box
can be derived for it.