{
  "circularId": 33802,
  "bibcode": "2023GCN.33802....1S",
  "body": "D. Svinkin, D. Frederiks, A. Ridnaia, A. Lysenko, and\nT. 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\nand\n\nS. Barthelmy, J. Cummings, H. Krimm, D. Palmer, and A. Tohuvavohu\non behalf of the Swift-BAT team, report:\n\nThe bright GRB 230512A\n(Fermi-GBM detection: The Fermi GBM team, GCN Circ. 33778;\nRoberts et al., GCN Circ. 33785;\nAstroSat-CZTI detection: Navaneeth et al., GCN Circ. 33779;\nFermi-LAT detection: Maheso et al., GCN Circ. 33780;\nGRBAlpha detection: Dafcikova et al., GCN Circ. 33795)\nwas detected by Fermi (GBM trigger 705565670; LAT), AstroSat (CZTI),\nKonus-Wind, GRBAlpha, and Swift (BAT) at about 23265 s UT (06:27:45).\nThe burst was outside the coded field of view of the BAT.\n\nWe have triangulated it to a Konus-GBM annulus centered at\nRA(2000)=252.326 deg (16h 49m 18s) Dec(2000)=-21.096 deg (-21d 05' 46\"),\nwhose radius is 71.928 +/- 0.057 deg (3 sigma).\n\nThe LAT position reported by Maheso et al. (GCN Circ. 33780)\nis consistent with the annulus. The annulus combined with\nthe LAT (90 % containment, statistical-only) error circle\ngives the following error box:\n---------------------------------\n RA(2000), deg   Dec(2000), deg\n---------------------------------\n  Center:\n    295.4160    +38.4139\n  Corners:\n    295.6484    +38.1720\n    295.7385    +38.2604\n    295.1883    +38.6501\n    295.0849    +38.5708\n---------------------------------\nThe error box area is 242.2 sq. arcmin (a factor of ~4\nsmaller than that of the LAT error circle), and its maximum\ndimension is 0.6 deg (the minimum one is 6.8 arcmin).\nThe Sun distance was 96 deg.\n\nThis box may be improved.\n\nThe Swift-XRT sources #2, 4, 8 (https://www.swift.ac.uk/xrt_products/TILED_GRB00111/) are inside the error box.\n\nThe OT candidate (Belkin et al., GCN Circ. 33796) is outside the error box.\n\nA triangulation map and HEALPix FITS file are posted at\nhttp://www.ioffe.ru/LEA/GRBs/GRB230512_T23265/IPN/\n\nThe Konus-Wind time history and spectrum will be given in a forthcoming\nGCN Circular.\n\n",
  "subject": "IPN triangulation of GRB 230512A",
  "submitter": "Dmitry Svinkin at Ioffe Institute <svinkin@mail.ioffe.ru>",
  "eventId": "GRB 230512A",
  "createdOn": 1684145825201
}