[vsnet-grb-info 13209] IPN Triangulation of GRB 130502B

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  14546
SUBJECT: IPN Triangulation of GRB 130502B
DATE:    13/05/03 19:38:51 GMT
FROM:    Kevin Hurley at UCBerkeley/SSL  <khurley at ssl.berkeley.edu>

K. Hurley and J. Goldsten, on behalf of the MESSENGER NS GRB team, 

S. Golenetskii, R. Aptekar, E. Mazets, V. Pal'shin, D. Frederiks, 
D. Svinkin, and T. Cline on behalf of the Konus-Wind team,

D. M. Smith, on behalf of the RHESSI GRB team, 

A. von Kienlin, X. Zhang, A. Rau, V. Savchenko, E. Bozzo, and C.
Ferrigno, on behalf of the INTEGRAL SPI-ACS GRB team,

K. Yamaoka, M. Ohno, Y. Hanabata, Y. Fukazawa, T. Takahashi, M. Tashiro,
Y. Terada, T. Murakami, and K. Makishima on behalf of the Suzaku WAM team,

S. Barthelmy, J. Cummings, N. Gehrels, H. Krimm, and D. Palmer, on behalf of
the Swift-BAT team,

E. Del Monte, I. Donnarumma, Y. Evangelista, M. Feroci, I. Lapshov,
F. Lazzarotto, and M. Marisaldi, on behalf of the AGILE Team, and

V. Connaughton, M. S. Briggs, C. Meegan, and V. Pelassa, 
on behalf of the Fermi GBM team, report:

GRB 130502B (von Kienlin et al., GCN 14530, Kocevski et al., GCN 14532,
Golenetskii et al., GCN 14542) has been observed by AGILE MCAL, Fermi
GBM, INTEGRAL (SPI-ACS), Konus-Wind, MESSENGER (GRNS), RHESSI, Suzaku
WAM, and Swift BAT (outside the coded field of view), so far.  We have
triangulated it to a long, narrow error box which reduces the
size of the LAT (statistical-only) error circle (GCN 14532) and produces 
the following error box:


              RA(2000)                                  DEC(2000)

CENTER:  66.6391 deg = 04 h 26 m 33 s         71.0809 deg = 71 d 04 ' 51 "
CORNERS: 66.8800 deg = 04 h 27 m 31 s         71.0295 deg = 71 d 01 ' 46 "
         66.4487 deg = 04 h 25 m 48 s         71.1511 deg = 71 d 09 ' 04 "
         66.8267 deg = 04 h 27 m 18 s         71.0114 deg = 71 d 00 ' 41 "
         66.4008 deg = 04 h 25 m 36 s         71.1314 deg = 71 d 07 ' 53 "

The area of this box is about 17 square arcminutes, and it contains the
Swift-XRT source (Melandri et al., GCN 14540).  Maps have been posted at
ssl.berkeley.edu/ipn3/130502

The triangulation can be improved.