{
  "body": "A.S. Kozyrev, D.V. Golovin, M.L. Litvak, I.G. Mitrofanov, and A.B. Sanin\non behalf of the HEND/Mars Odyssey team,\n\nA. Ridnaia, D. Frederiks, A. Lysenko, D. Svinkin,\nand T. Cline on behalf of the Konus-Wind team,\n\nA. Goldstein, M. S. Briggs, C. Wilson-Hodge,\nand E. Burns on behalf of the Fermi GBM team,\n\nE. Bozzo and C. Ferrigno, on behalf of the INTEGRAL SPI-ACS GRB team,\n\nS. Barthelmy, J. Cummings, H. Krimm, D. Palmer, and A. Tohuvavohu\non behalf of the Swift-BAT team,\n\nand\n\nW. Boynton, C. Fellows, K. Harshman, H. Enos, R. Starr,\nand A.S. Gardner on on behalf of the GRS-Odyssey GRB team,\nreport:\n\nThe long-duration GRB 250201A\n(Fermi-GBM detection: Fermi GBM team, GCN 39112; \nBALROG localization: Preis & Greiner, GCN 39113;\nINTEGRAL SPI/ACS detection: Barria et al., GCN 39117)\nwas detected by Fermi (GBM), Konus-Wind, INTEGRAL (SPI-ACS),\nSwift (BAT), and Mars-Odyssey (HEND) at about 35987 s UT (09:59:47).\nThe burst was outside the coded field of view of the BAT.\n\nWe have triangulated it to a preliminary, 3 sigma error box\nwhose coordinates are:\n  -------------------------------\n   RA(2000), deg   Dec(2000), deg\n  -------------------------------\n  Center:\n    115.287     -54.293\n  Corners:\n    137.464     -51.378\n    137.379     -51.074\n     93.570     -52.488\n     93.601     -52.814\n  -------------------------------\nThe error box area is 6.8 sq. deg, and its maximum\ndimension is 26.3 deg (the minimum one is 21 arcmin).\nThe Sun distance was 101 deg.\n\nA triangulation map and HEALPix FITS file are posted at\nhttp://www.ioffe.ru/LEA/GRBs/GRB250201_T35989/IPN\nThe HEALPix triangulation map is the multi-order HEALPix in units of\nprobability density.\n\nThe Konus-Wind time history and spectrum will be given\nin a forthcoming GCN Circular.",
  "submitter": "Anna Ridnaia at Ioffe Institute <ridnaia@mail.ioffe.ru>",
  "submittedHow": "web",
  "circularId": 39151,
  "createdOn": 1738768886810,
  "bibcode": "2025GCN.39151....1K",
  "eventId": "GRB 250201A",
  "format": "text/plain",
  "subject": "IPN triangulation of GRB 250201A"
}