{
  "bibcode": "2018GCN.23577....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. Goldstein, M. S. Briggs, and C. Wilson-Hodge\non behalf of the Fermi GBM 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\nand\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 GRB 181227A\n(Fermi-GBM detection: Bissaldi & Veres, GCN Circ. 23569)\nwas detected by Fermi (GBM trigger 567584225), Konus-Wind,\nINTEGRAL (SPI-ACS), Mars-Odyssey (HEND), and Swift (BAT)\nat about 22620 s UT (06:17:00).\nThe burst was detected by Swift (BAT) during the slew and\nno event data were captured (Sakamoto, Lien, and Pal'shin, priv. comm.).\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    29.889 (01h 59m 33s) -53.321 (-53d 19' 14\")\n  Corners:\n    30.664 (02h 02m 39s) -52.621 (-52d 37' 16\")\n    30.861 (02h 03m 27s) -53.105 (-53d 06' 19\")\n    27.501 (01h 50m 00s) -54.693 (-54d 41' 35\")\n    27.344 (01h 49m 22s) -54.208 (-54d 12' 30\")\n  ---------------------------------------------\nThe error box area is about 1.13 sq. deg, and its maximum\ndimension is 2.79 deg (the minimum one is 27.84 arcmin).\nThe Sun distance was about 84 deg.\n\nThis box may be improved.\n\nA triangulation map is posted at\nhttp://www.ioffe.ru/LEA/GRBs/GRB181227_T22619/IPN/\n\nThe Konus-Wind time history and spectrum will be given in a forthcoming\nGCN Circular.",
  "circularId": 23577,
  "createdOn": 1545992843000,
  "email": "svinkin@mail.ioffe.ru",
  "subject": "IPN Triangulation of GRB 181227A (long)",
  "submitter": "Dmitry Svinkin at Ioffe Institute  <svinkin@mail.ioffe.ru>",
  "eventId": "GRB 181227A"
}