TITLE: GCN CIRCULAR NUMBER: 31346 SUBJECT: IPN triangulation of GRB 211219A DATE: 21/12/31 15:44:38 GMT FROM: Dmitry Svinkin at Ioffe Institute svinkin@mail.ioffe.ru
A.S. Kozyrev, D.V. Golovin, M.L. Litvak, I.G. Mitrofanov, and A.B. Sanin on behalf of the MGNS/BepiColombo and HEND/Mars Odyssey teams,
J. Benkhoff on behalf of the BepiColombo team,
K. Hurley on behalf of the IPN,
D. Svinkin, D. Frederiks, A. Ridnaia, A. Lysenko, 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,
A. Goldstein, M. S. Briggs, and C. Wilson-Hodge on behalf of the Fermi GBM team,
S. Barthelmy, J. Cummings, H. Krimm, D. Palmer, and A. Tohuvavohu 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:
A long-duration GRB 211219A (Fermi-GBM detection: Fermi GBM Team, GCN Circ. 31265; Swift/BAT-GUANO detection: Tohuvavohu et al., GCN Circ. 31269; AGILE-MCAL detection: Ursi et al., GCN Circ. 31270; AstroSat-CZTI detection: Prasad et al., GCN Circ. 31283) was detected by Fermi (GBM trigger 661618527), Swift (BAT), AGILE (MCAL), AstroSat (CZTI), Konus-Wind, INTEGRAL (SPI-ACS), Mars-Odyssey (HEND) and BepiColombo (MGNS) at about 53722 s UT (14:55:22). 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: 58.652 (03h 54m 37s) -34.619 (-34d 37' 09") Corners: 59.468 (03h 57m 52s) -34.736 (-34d 44' 11") 57.992 (03h 51m 58s) -34.656 (-34d 39' 23") 57.835 (03h 51m 20s) -34.491 (-34d 29' 27") 59.309 (03h 57m 14s) -34.575 (-34d 34' 30") --------------------------------------------- The error box area is 676 sq. arcmin, and its maximum dimension is 1.37 deg (the minimum one is 6 arcmin). The Sun distance was 115 deg.
This box may be improved.
The IPN localization is consistent with, but reduces the area of, the Fermi final position.
A triangulation map is posted at http://www.ioffe.ru/LEA/GRBs/GRB211219_T53724/IPN