TITLE: GCN CIRCULAR NUMBER: 36829 SUBJECT: IPN triangulation of GRB 240628B (short) DATE: 24/07/05 14:53:53 GMT FROM: Dmitry Svinkin at Ioffe Institute <svinkin@mail.ioffe.ru> D. Svinkin, D. Frederiks, A. Ridnaia, A. Lysenko, on behalf of the IPN, A. Goldstein, M. S. Briggs, C. Wilson-Hodge, and E. Burns on behalf of the Fermi GBM team, E. Bozzo and C. Ferrigno, on behalf of the INTEGRAL SPI-ACS GRB team, S. Barthelmy, J. Cummings, H. Krimm, D. Palmer, and A. Tohuvavohu on behalf of the Swift-BAT team, report: The short-duration GRB 240628B was detected by Fermi (GBM trigger 741296200), Swift (BAT), and INTEGRAL (SPI-ACS) at about 70596 s UT (19:36:36). The burst was outside the coded field of view of the BAT. We have triangulated it to the following annuli: --------------------------------------------------- annulus R.A. Dec. R dR (3sigma) (deg) (deg) (deg) (deg) --------------------------------------------------- GBM-SPI-ACS 30.342 -81.135 79.219 1.517 GBM-BAT 268.041 11.906 43.493 43.493 --------------------------------------------------- The annuli intersect to form a long arc which was partially Earth occulted for Fermi. The area of the preliminary 3-sigma IPN localization is 224.5 sq. deg, and its maximum dimension is 70.7 deg (the minimum one is 3 deg). This localization may be improved. A triangulation map and HEALPix FITS file are posted at http://www.ioffe.ru/LEA/GRBs/GRB240628_T70595/IPN/ The HEALPix triangulation map is the multi-order HEALPix in units of probability density. View this GCN Circular online at https://gcn.nasa.gov/circulars/36829. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...