IPN triangulation of GRB 210524A

Report the intense, long-duration GRB 210524A (Fermi-GBM detection: The Fermi GBM team, GCN Circ. 30071; BALROG localization: Biltzinger et al., GCN Circ. 30073) was detected by Fermi (GBM trigger 643525204), Konus-Wind, Mars-Odyssey (HEND), INTEGRAL (SPI-ACS), and Swift-BAT at about 17999 s UT (04:59:59). The burst was outside the coded field of view of the BAT. We have triangulated it to a preliminary, 3 sigma error box whose coordinates are: --------------------------------------------- RA(2000), deg Dec(2000), deg --------------------------------------------- Center: 343.564 (22h 54m 15s) -46.672 (-46d 40' 19") Corners: 342.645 (22h 50m 35s) -49.867 (-49d 52' 00") 344.262 (22h 57m 03s) -43.354 (-43d 21' 13") 344.203 (22h 56m 49s) -43.132 (-43d 07' 56") 342.607 (22h 50m 26s) -49.680 (-49d 40' 48") --------------------------------------------- The error box area is 1584 sq. arcmin, and its maximum dimension is 6.8 deg (the minimum one is 4 arcmin). The Sun distance was 95 deg. This box may be improved. The IPN localization is consistent with, but reduces the area of, the Fermi RoboBA and BALROG localizations (GCN Circ. 30071 and 30073). A triangulation map is posted at http://www.ioffe.ru/LEA/GRBs/GRB210524_T18010/IPN/ The Konus-Wind time history and spectrum will be given in a forthcoming GCN Circular.