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GCN Circular 2162

Subject
IPN triangulation of GRB030422 (two large error boxes)
Date
2003-04-22T18:29:23Z (21 years ago)
From
Kevin Hurley at UCBerkeley/SSL <khurley@sunspot.ssl.berkeley.edu>
K. Hurley, and T. Cline, on behalf of the Ulysses and Mars
Odyssey GRB teams,

A. von Kienlin, G. Lichti, and A. Rau, on behalf of the
INTEGRAL SPI-ACS GRB team,

I. Mitrofanov, D. Anfimov, A. Kozyrev, M. Litvak and A. Sanin, on
behalf of the HEND-Odyssey GRB team, and

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

This burst was observed by Ulysses, Mars Odyssey (GRS), and
INTEGRAL (SPI-ACS) at 28275 s.

As observed by Ulysses, it had a duration of approximately  10
seconds, a 25-100 keV fluence of approximately  6.2E-06 erg/cm2, and a
peak flux of approximately  7.6E-07 erg/cm2 s over 0.25 seconds.

We have triangulated it to two alternate, preliminary, 3 sigma error
boxes each with approximate area 24000 square arcminutes whose
coordinates are:

    RA(2000)                              DEC(2000)
 ERROR BOX CENTER:  17 h 42 m 27.23 s     -6 o 54 '   0.77 " 
 ERROR BOX CORNER 1: 17 h 43 m 21.88 s     -6 o 26 '   4.00 " 
 ERROR BOX CORNER 2: 17 h 28 m 12.29 s    -11 o 34 '   8.17 " 
 ERROR BOX CORNER 3: 18 h 11 m 36.51 s      1 o 39 '  13.89 " 
 ERROR BOX CORNER 4: 17 h 41 m 35.44 s     -7 o 21 '  12.46 " 

                                       OR

 ERROR BOX CENTER:  19 h  5 m 34.33 s     13 o 47 '   0.40 " 
 ERROR BOX CORNER 4: 19 h  3 m 38.29 s     13 o 33 '  56.68 " 
 ERROR BOX CORNER 5: 19 h 25 m 27.01 s     17 o  7 '  58.89 " 
 ERROR BOX CORNER 6: 18 h 30 m 47.64 s      6 o 30 '  24.53 " 
 ERROR BOX CORNER 7: 19 h  7 m 27.44 s     13 o 59 '  17.61 " 

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