{
  "bibcode": "2017GCN.21820....1H",
  "body": "K. Hurley, on behalf of the IPN,\n\nI. G. Mitrofanov, D. Golovin, M. L. Litvak, and A. B. Sanin,\non behalf of the HEND-Odyssey GRB team,\n\nD. Svinkin, S. Golenetskii, R. Aptekar, D. Frederiks, A. Kozlova,\nand T. Cline on behalf of the Konus-Wind team,\n\nA. von Kienlin, X. Zhang, A. Rau, V. Savchenko, E. Bozzo,\nand C. Ferrigno, on behalf of the INTEGRAL SPI-ACS GRB team,\n\nS. Barthelmy, J. Cummings, H. Krimm, and D. Palmer,\non behalf of the Swift-BAT team,\n\nX. B. Li, Y. Huang, Z. W. Li, and S. L. Xiong,\non behalf of the Insight-HXMT team, and\n\nW. Boynton, C. Fellows, K. Harshman, H. Enos, and R. Starr,\non behalf of the GRS-Odyssey GRB team, report:\n\nThe long-duration, very bright GRB 170904A (Li et al., GCN Circ. 21817)\nwas detected by Konus-Wind, INTEGRAL (SPI-ACS), Insight-HXMT (HE),\nMars-Odyssey (HEND), and Swift (BAT) at about 35161 s UT (09:46:01).\nThe burst was outside the coded field of view of the BAT.\n\nWe have triangulated it to a preliminary, 3 sigma error box whose \ncoordinates are:\n---------------------------------------------\n   RA(2000), deg                 Dec(2000), deg\n  ---------------------------------------------\n  Center:\n    35.374 (02h 21m 30s) -32.498 (-32d 29' 51\")\n  Corners:\n    35.139 (02h 20m 33s) -34.082 (-34d 04' 56\")\n    35.438 (02h 21m 45s) -33.461 (-33d 27' 38\")\n    35.574 (02h 22m 18s) -30.892 (-30d 53' 32\")\n    35.302 (02h 21m 12s) -31.531 (-31d 31' 51\")\n  ---------------------------------------------\nThe error box area is 1934 sq. arcmin, and its maximum\ndimension is 3.2 deg (the minimum one is 12.6 arcmin).\nThe Sun distance was 125 deg.\n\nThis box may be improved.\n\nA triangulation map is posted at\nhttp://www.ioffe.ru/LEA/GRBs/GRB170904_T35162/IPN\n\nThe Konus-Wind time history and spectrum will be given in a forthcoming\nGCN Circular.",
  "circularId": 21820,
  "createdOn": 1504645175000,
  "email": "svinkin@mail.ioffe.ru",
  "subject": "IPN Triangulation of GRB 170904A (long/very bright)",
  "submitter": "Dmitry Svinkin at Ioffe Institute  <svinkin@mail.ioffe.ru>",
  "eventId": "GRB 170904A"
}