TITLE: GCN CIRCULAR NUMBER: 39045 SUBJECT: IPN triangulation of GRB 250119C DATE: 25/01/27 12:48:35 GMT FROM: Dmitry Svinkin at Ioffe Institute svinkin@mail.ioffe.ru
D. Svinkin, D. Frederiks, A. Lysenko, A. Ridnaia, and T. Cline on behalf of the Konus-Wind team,
A. Goldstein, M. S. Briggs, C. Wilson-Hodge, and E. Burns on behalf of the Fermi GBM team,
E. Bozzo and C. Ferrigno, on behalf of the INTEGRAL SPI-ACS GRB team,
S. Barthelmy, J. Cummings, H. Krimm, D. Palmer, and A. Tohuvavohu on behalf of the Swift-BAT team, report:
The long-duration GRB 250119C (Fermi-GBM detection: The Fermi GBM team, GCN 38990; Smith and Meegan, GCN 39030; Swift-BAT/GUANO detection: Ronchini et al., GCN 39008) was detected by Fermi (GBM trigger 759019271), Swift (BAT), Konus-Wind, and INTEGRAL (SPI-ACS) at about 81666 s UT (22:41:06). 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: 158.335 (10h 33m 20s) +20.621 (+20d 37' 17") Corners: 135.211 (09h 00m 51s) +18.215 (+18d 12' 54") 179.680 (11h 58m 43s) +14.804 (+14d 48' 15") 182.465 (12h 09m 52s) +23.952 (+23d 57' 06") 135.484 (09h 01m 56s) +27.480 (+27d 28' 47") --------------------------------------------- The error box area is 393.4 sq. deg, and its maximum dimension is 44.2 deg (the minimum one is 9.2 deg). The Sun distance was 124 deg.
This localization may be improved.
The IPN localization is consistent with, but reduces the area of, the Fermi-GBM (GCN 38990) and Swift-BAT/GUANO (GCN 39008) localizations.
A triangulation map and HEALPix FITS file are posted at http://www.ioffe.ru/LEA/GRBs/GRB250119_T81666/IPN The HEALPix triangulation map is the multi-order HEALPix in units of probability density.
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