{
  "submitter": "Dmitry Svinkin at Ioffe Institute <svinkin@mail.ioffe.ru>",
  "circularId": 34917,
  "bibcode": "2023GCN.34917....1K",
  "eventId": "GRB 231020A",
  "body": "A.S. Kozyrev, D.V. Golovin, M.L. Litvak, I.G. Mitrofanov, and A.B. Sanin\non behalf of the MGNS/BepiColombo and HEND/Mars Odyssey teams,\n\nJ. Benkhoff on behalf of the BepiColombo team,\n\nD. Svinkin, D. Frederiks, A. Ridnaia, A. Lysenko,\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 231020A\n(Fermi-GBM detection: The Fermi GBM team, GCN Circ. 34856;\nBala et al., GCN Circ. 34869;\nBALROG localization: Preis et al., GCN Circ. 34861;\nAstroSat-CZTI detection: Navaneeth et al., GCN Circ. 34880;\nGRID detection: Wang and Yang, GCN Circ. 34903)\nwas detected by Fermi (GBM trigger 719521023), INTEGRAL (SPI-ACS),\nKonus-Wind, Swift (BAT), Mars-Odyssey (HEND), BepiColombo (MGNS),\nAstroSat (CZTI), and GRID, at about 68218 s UT (18:56:58).\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  314.493 (20h 57m 58s) -29.254 (-29d 15' 15\")\n Corners:\n  314.061 (20h 56m 15s) -28.067 (-28d 04' 02\")\n  314.696 (20h 58m 47s) -29.893 (-29d 53' 33\")\n  314.881 (20h 59m 31s) -30.286 (-30d 17' 09\")\n  314.275 (20h 57m 06s) -28.562 (-28d 33' 43\")\n ---------------------------------------------\nThe error box area is 247 sq. arcmin, and its maximum\ndimension is 2.3 deg (the minimum one is 2.2 arcmin).\nThe Sun distance was 101 deg.\n\nThis localization may be improved.\n\nThe IPN localization is consistent with, but reduces the area of,\nthe Fermi-GBM final localization.\n\nA triangulation map and HEALPix FITS file are posted at\nhttp://www.ioffe.ru/LEA/GRBs/GRB231020_T68224/IPN\n\nThe Konus-Wind time history and spectrum will be given\nin a forthcoming GCN Circular.\n\n",
  "createdOn": 1698698209976,
  "subject": "IPN triangulation of GRB 231020A",
  "submittedHow": "email-legacy"
}