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GCN Circular 1450

Subject
IPN triangulation of GRB020708
Date
2002-07-08T23:19:56Z (22 years ago)
From
Kevin Hurley at UCBerkeley/SSL <khurley@sunspot.ssl.berkeley.edu>
K. Hurley, on behalf of the Ulysses GRB team,

T. Cline, on behalf of the Ulysses and Konus-Wind GRB teams,

E. Mazets and S. Golenetskii, on behalf of the Konus-Wind GRB team,

I. Mitrofanov, D. Anfimov, A.Kozyrev, M. Litvak and A.Sanin 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, report:

Ulysses, Konus, and Mars Odyssey-HEND observed this burst at 16451 s.

As observed by Ulysses, it had a duration of about 150 seconds, a
25-100 keV fluence of approximately 1.4E-05 erg/cm2, and a peak flux of
approximately  1.0E-06 erg/cm2 s over 0.25 seconds.

We have triangulated it to two alternate, preliminary, 3 sigma error
boxes each with approximate area 110. square arcminutes whose
coordinates are:

    RA(2000)                              DEC(2000)
 ERROR BOX CENTER:   9 h 16 m 19.46 s     28 o 26 '  37.60 " 
 ERROR BOX CORNER 1:  9 h 16 m 13.03 s     28 o 23 '  22.43 " 
 ERROR BOX CORNER 2:  9 h 16 m 25.91 s     28 o 29 '  52.73 " 
 ERROR BOX CORNER 3:  9 h 16 m 56.59 s     28 o 19 '  23.24 " 
 ERROR BOX CORNER 4:  9 h 15 m 41.80 s     28 o 33 '  58.02 " 
 ERROR BOX CORNER 5:  9 h 15 m 49.64 s     28 o 27 '  31.01 "
 ERROR BOX CORNER 6:  9 h 16 m 49.24 s     28 o 25 '  44.61 "

                                       OR

 ERROR BOX CENTER:   7 h 58 m  5.36 s     41 o 35 '  38.95 " 
 ERROR BOX CORNER 7:  7 h 57 m 49.90 s     41 o 33 '  35.55 " 
 ERROR BOX CORNER 8:  7 h 58 m 20.82 s     41 o 37 '  42.25 " 
 ERROR BOX CORNER 9:  7 h 57 m 18.40 s     41 o 42 '  08.53 " 
 ERROR BOX CORNER 10:  7 h 58 m 52.84 s     41 o 29 '  03.72 " 
 ERROR BOX CORNER 11:  7 h 58 m 17.24 s     41 o 29 '  25.08 "
 ERROR BOX CORNER 12:  7 h 57 m 53.51 s     41 o 41 '  52.39 "

There is a chance that the ambiguity can be resolved by further
processing.  These error boxes may be improved.

A map will be posted shortly at ssl.berkeley.edu/ipn3/020708.  Note
that somewhat larger, four-sided error boxes were circulated in the GCN
socket message, for reasons related to the formatting of those
messages.  The above, smaller error boxes are the more precise ones.
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