{
  "bibcode": "2023GCN.33461....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\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\nUsing the BepiColombo (MGNS) data we have further improved\nthe previous IPN box for GRB 230307A (Kozyrev et al., GCN Circ. 33425).\nThe coordinates of the updated 3 sigma error box are:\n---------------------------------------------\n   RA(2000), deg                 Dec(2000), deg\n  ---------------------------------------------\n  Center:\n    60.867 (04h 03m 28s) -75.382 (-75d 22' 57\")\n  Corners:\n    60.846 (04h 03m 23s) -75.417 (-75d 25' 03\")\n    61.006 (04h 04m 01s) -75.357 (-75d 21' 26\")\n    60.889 (04h 03m 33s) -75.348 (-75d 20' 51\")\n    60.728 (04h 02m 55s) -75.408 (-75d 24' 28\")\n  ---------------------------------------------\nThe error box area is 8 sq. arcmin, and its maximum\ndimension is 5 arcmin (the minimum one is 1.8 arcmin).\nThe Sun distance was 80 deg.\n\nThis box may be further improved.\n\nThe distance between the IPN box center and X-ray/optical\ntransient position (X-ray Source #2 in Burrows et al., GCN Circ. 33429;\nLevan et al., GCN Circ. 33439; Lipunov et al. GCN Circ. 33441;\nO'Connor et al., GCN Circ. 33447; Im et al., GCN Circ. 33449;\nVanderspek et al., GCN Circ. 33453)\nis 15 arcsec, which further strengthen the interpretation of transient as\nthe burst afterglow.\n\nAn updated triangulation map and HEALPix FITS file are posted at\nhttp://www.ioffe.ru/LEA/GRBs/GRB230307_T56646/IPN",
  "circularId": 33461,
  "createdOn": 1678572443000,
  "email": "svinkin@mail.ioffe.ru",
  "subject": "Further improved IPN localization for GRB 230307A",
  "submitter": "Dmitry Svinkin at Ioffe Institute  <svinkin@mail.ioffe.ru>",
  "eventId": "GRB 230307A"
}