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GCN Circular 23764

IPN Triangulation of GRB 190117A (long)
2019-01-21T16:44:34Z (5 years ago)
Dmitry Svinkin at Ioffe Institute <>
K. Hurley, on behalf of the IPN,

I. G. Mitrofanov, D. Golovin, M. L. Litvak, and A. B. Sanin,
on behalf of the HEND-Odyssey GRB team,

D. Svinkin, S. Golenetskii, R. Aptekar, D. Frederiks, A. Kozlova
and T. Cline on behalf of the Konus-Wind team,

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

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

S. Xiao, C. K. Li, X. B. Li, Y. Huang, and S. L. Xiong
on behalf of the Insight-HXMT GRB team,


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

The long-duration GRB 190117A was detected by
AGILE (MCAL; Ursi, et al., GCN Circ. 23752),
Insight (HXMT/HE; Xiao et al., GCN Circ. 23759),
Konus-Wind, INTEGRAL (SPI-ACS), and Swift (BAT),
at about 52607 s UT (14:36:47).
The burst was outside the coded field of view of the BAT.

We have triangulated it to a preliminary, 3 sigma error box
whose coordinates are:
   RA(2000), deg                 Dec(2000), deg
   113.864 (07h 35m 27s)  +6.519 ( +6d 31' 10")
   113.942 (07h 35m 46s)  +8.247 ( +8d 14' 49")
   113.615 (07h 34m 28s)  +5.249 ( +5d 14' 56")
   113.807 (07h 35m 14s)  +4.881 ( +4d 52' 52")
   114.126 (07h 36m 30s)  +7.833 ( +7d 49' 58")
The error box area is about 2453 sq. arcmin, and its maximum
dimension is 3.369 deg (the minimum one is 13.68 arcmin).
The Sun distance was about 163 deg.

This box may be improved.

A triangulation map is posted at

The Konus-Wind time history and spectrum will be given in a forthcoming
GCN Circular.
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