TITLE: GCN CIRCULAR NUMBER: 34752 SUBJECT: IPN triangulation of GRB 230919A (short) DATE: 23/09/20 21:46:04 GMT FROM: Anna Ridnaia at Ioffe Institute <ridnaia@mail.ioffe.ru> A.S. Kozyrev, D.V. Golovin, M.L. Litvak, I.G. Mitrofanov, and A.B. Sanin on behalf of the HEND/Mars Odyssey team, A. Ridnaia, D. Frederiks, D. Svinkin, A. Lysenko, and T. Cline on behalf of the Konus-Wind team, A. Goldstein, M. S. Briggs, C. Wilson-Hodge, and E. Burns on behalf of the Fermi GBM team, S. Barthelmy, J. Cummings, H. Krimm, D. Palmer, and A. Tohuvavohu on behalf of the Swift-BAT team, and W. Boynton, C. Fellows, K. Harshman, H. Enos, R. Starr, and A.S. Gardner on on behalf of the GRS-Odyssey GRB team, report: The short-duration GRB 230919A (Fermi-GBM detection: The Fermi GBM team, GCN Circ. 34737; Scotton et al., GCN Circ. 34750; AstroSat CZTI detection: Navaneeth et al., GCN Circ. 34742; Swift/BAT-GUANO detection: DeLaunay et al., GCN Circ. 34747) has been detected by Fermi (GBM trigger 716835508), Konus-Wind, Mars-Odyssey (HEND), Swift (BAT), and AstroSat (CZTI), so far, at about 61103 s UT (16:58:23). 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: 71.620 (04h 46m 29s) +44.076 (+44d 04' 35") Corners: 70.812 (04h 43m 15s) +45.562 (+45d 33' 43") 70.802 (04h 43m 12s) +45.703 (+45d 42' 10") 72.402 (04h 49m 37s) +42.484 (+42d 29' 04") 72.411 (04h 49m 39s) +42.324 (+42d 19' 28") --------------------------------------------- The error box area is 543 sq. arcmin, and its maximum dimension is 3.6 deg (the minimum one is 3 arcmin). The Sun distance was 100 deg. The IPN localization is consistent with, but reduces the area of, the Fermi-GBM final localization (GCN Circ. 34737). This localization may be improved. A triangulation map and HEALPix FITS file are posted at http://www.ioffe.ru/LEA/GRBs/GRB230919_T61103/IPN/ The Konus-Wind time history and spectrum will be given in a forthcoming GCN Circular. View this GCN Circular online at https://gcn.nasa.gov/circulars/34752. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...