[vsnet-grb-info 6894] GRB 081105 Swift/BAT and IPN Localization

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  8484
SUBJECT: GRB 081105 Swift/BAT and IPN Localization
DATE:    08/11/06 01:00:17 GMT
FROM:    Jay R. Cummings at NASA/GSFC/Swift  <jayc at milkyway.gsfc.nasa.gov>

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

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

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

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

and M. Marisaldi, F. Fuschino, M. Galli, C. Labanti,
E. Del Monte, F. Lazzarotto, L. Pacciani, and P. Soffitta
on behalf of the AGILE team

At 2008-11-05 T0=48372.403 s UT (13:26:12.403), a long soft GRB,
GRB 081105 triggered Konus/Wind. The IPN was informed, and Swift/BAT,
AGILE-MCAL, Suzaku/WAM, and INTEGRAL/SPI-ACS reported coincident
rate increases. Ground analysis of BAT data (trigger #333811) yielded 
a significant image peak that was found to be coincident with the IPN 
timing triangulation annulus. The location of the burst was
RA, Dec 3.966, 3.454, uncertainty radius of 2.5 arcmin, which is

   RA(J2000) = 00h 15m 51.8s
   Dec(J2000) = +03d 27' 14"

The source was found onboard, but not with high enough significance
to trigger an automatic burst response. The partial coding was only
2.5%.

The burst was a single peak, about 10 seconds long.

A Swift TOO has been requested and approved. The Swift narrow-field
instruments should begin observing the burst at about 04:30 UT, 15
hours after the burst.