{
  "bibcode": "2021GCN.31024....1K",
  "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\nK. Hurley on behalf of the IPN,\n\nD. Svinkin, S. Golenetskii, D. Frederiks, A. Ridnaia,\nA. Lysenko, and 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, D. Palmer, and A. Tohuvavohu\non behalf of the Swift-BAT 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 GRB 211022A\n(GECAM-B detection: Zhao et al., GCN Circ. 30955;\nAstroSat-CZTI detection: Prasad et al., GCN Circ. 30968)\nwas detected by BepiColombo (MGNS; see introductory GCN Circ. 30949),\nMars-Odyssey (HEND), GECAM-B, AstroSat (CZTI), Konus-Wind,\nINTEGRAL (SPI-ACS), and Swift (BAT), at about 2845 s UT (00:47:25).\nThe burst was outside the coded field of view of the BAT.\n\nThe burst light curves in the energy range 30 keV-1.5 MeV (HEND)\nand 250-450 keV (MGNS) exhibit a multi-peaked pulse structure\nwith a total duration of ~150 s.\n\nWe have triangulated GRB 211022A to the following 3 sigma annuli:\n------------------------------------------------------------\n            R.A.(J2000)  Dec.(J2000)    R      +dR     -dR\n                deg         deg        deg     deg     deg\n------------------------------------------------------------\nMGNS-HEND      30.161     12.392    125.005  +0.096  -0.214\nSPI-ACS-HEND  202.386     -8.806     53.850  +0.093  -0.071\nKonus-SPI-ACS 193.415    -14.239     44.866  +5.706  -5.232\n------------------------------------------------------------\nThe MGNS-HEND and SPI-ACS-HEND annuli intersect to form two error\nboxes one of which is inconsistent with the Konus-SPI-ACS annulus,\nthe KW ecliptic latitude response, and the GECAM position.\n\nThe correct preliminary, 3 sigma error box is:\n---------------------------------------------\n   RA(2000), deg                 Dec(2000), deg\n  ---------------------------------------------\n  Center:\n   161.615 (10h 46m 27s) -51.006 (-51d 00' 21\")\n  Corners:\n   160.852 (10h 43m 24s) -50.508 (-50d 30' 29\")\n   162.525 (10h 50m 06s) -51.893 (-51d 53' 33\")\n   161.845 (10h 47m 23s) -51.080 (-51d 04' 47\")\n   160.242 (10h 40m 58s) -49.672 (-49d 40' 19\")\n  ---------------------------------------------\nThe error box area is 1026 sq. arcmin, and its maximum\ndimension is 2.6 deg (the minimum one is 9.8 arcmin).\nThe Sun distance was 54 deg.\n\nThis box may be improved.\n\nA triangulation maps are posted at:\nhttp://www.ioffe.ru/LEA/GRBs/GRB211022_T02845/IPN\n\nThe Konus-Wind time history and spectrum will be given\nin a forthcoming GCN Circular.",
  "circularId": 31024,
  "createdOn": 1635597389000,
  "email": "svinkin@mail.ioffe.ru",
  "subject": "IPN triangulation of GRB 211022A",
  "submitter": "Dmitry Svinkin at Ioffe Institute  <svinkin@mail.ioffe.ru>",
  "eventId": "GRB 211022A"
}