{
  "eventId": "GRB 240303B",
  "submittedHow": "email-legacy",
  "bibcode": "2024GCN.35862....1K",
  "circularId": 35862,
  "submitter": "Dmitry Svinkin at Ioffe Institute <svinkin@mail.ioffe.ru>",
  "createdOn": 1709577531414,
  "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\nD. Svinkin, D. Frederiks, A. Lysenko, A. Ridnaia,\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\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 240303B\n(Fermi-GBM detection: The Fermi GBM team, GCN 35850;\nHamburg and Meegan, GCN 35860;\nBALROG localization: Preiset al., GCN 35851;\nCALET-GBM detection: Nakahira et al., GCN 35857)\nhas been detected by Fermi (GBM trigger 731161136),\nINTEGRAL (SPI-ACS), Konus-Wind, CALET (GBM),\nand Mars-Odyssey (HEND), so far, at about 44331 s UT (12:18:51).\n\nWe have triangulated this GRB to the following annuli:\n---------------------------------------------------\nannulus           R.A.     Dec.     R     dR (3sigma)\n                 (deg)    (deg)   (deg)     (deg)\n---------------------------------------------------\nKonus-GBM       320.846  -16.019  24.529  2.743\nGBM-SPI-ACS     194.036   78.908  88.157  8.554\nGBM-HEND        317.319  -17.507  23.796  0.133\n---------------------------------------------------\nThe annuli intersect to form a long 8.1 sq.deg (3 sigma)\nlocalization region.\n\nThe IPN localization is consistent with, but reduces the area of,\nthe Fermi-GBM final and the BALROG localizations.\n\nThis localization may be improved.\n\nA triangulation map and HEALPix FITS file are posted at\nhttp://www.ioffe.ru/LEA/GRBs/GRB240303_T44327/IPN\n\nThe Konus-Wind time history and spectrum will be given\nin a forthcoming GCN circular.\n\n",
  "subject": "IPN triangulation of GRB 240303B"
}