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GCN Circular 23534

Subject
IPN Triangulation of GRB 181212A (long)
Date
2018-12-14T07:42:53Z (6 years ago)
From
Dmitry Svinkin at Ioffe Institute <svinkin@mail.ioffe.ru>
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. Goldstein, M. S. Briggs, and C. Wilson-Hodge
on behalf of the Fermi GBM 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,

and

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

The long-duration GRB 181212A
(Fermi-GBM detection: Fletcher, GCN Circ. 23524Loading...
 
 )
was detected by Fermi (GBM trigger 566325471), Konus-Wind,
INTEGRAL (SPI-ACS), Mars-Odyssey (HEND), and Swift (BAT)
at about 59866 s UT (16:37:46).
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
  ---------------------------------------------
  Center:
   300.663 (20h 02m 39s)  -0.324 ( +0d 19' 27")
  Corners:
   301.111 (20h 04m 27s)  +1.224 ( +1d 13' 26")
   300.707 (20h 02m 50s)  +1.563 ( +1d 33' 47")
   300.075 (20h 00m 18s)  -3.456 ( -3d 27' 22")
   300.497 (20h 01m 59s)  -3.868 ( -3d 52' 05")
  ---------------------------------------------
The error box area is about 2.31 sq. deg, and its maximum
dimension is 5.43 deg (the minimum one is 29 arcmin).
The Sun distance was about 43 deg.

This box may be improved.

A triangulation map is posted at
http://www.ioffe.ru/LEA/GRBs/GRB181212_T59862/IPN

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