GRB 021025
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.
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.