//////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 27178 SUBJECT: GRB 200224C: Fermi GBM Final Real-time Localization DATE: 20/02/24 10:09:03 GMT FROM: Fermi GBM Team at MSFC/Fermi-GBM The Fermi GBM team reports the detection of a likely SHORT GRB At 09:58:44 UT on 24 Feb 2020, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 200224A (trigger 604231129.56693 / 200224416). The on-ground calculated location, using the Fermi GBM trigger data, is RA = 270.5, Dec = -56.8 (J2000 degrees, equivalent to J2000 18h 02m, -56d 47'), with a statistical uncertainty of 6.0 degrees. The angle from the Fermi LAT boresight is 151.0 degrees. The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn200224416/quicklook/glg_skymap_all_bn200224416.png The HEALPix FITS file, including the estimated localization systematic, can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn200224416/quicklook/glg_healpix_all_bn200224416.fit The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn200224416/quicklook/glg_lc_medres34_bn200224416.gif [GCN OPS NOTE(24feb20): This is the seventh Circular in the sequence of 8 circulars which were all labeled A because of the sequence assigner being offline. This circular was orginally, incorrectly labelled A, but the true letter identity is C.] //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 27183 SUBJECT: IPN triangulation of GRB 200224C DATE: 20/02/24 21:54:15 GMT FROM: Dmitry Svinkin at Ioffe Institute D. Svinkin and K. Hurley, on behalf of the IPN, A. Goldstein, M. S. Briggs, and C. Wilson-Hodge on behalf of the Fermi GBM team, and A. von Kienlin, X. Zhang, A. Rau, V. Savchenko, E. Bozzo, and C. Ferrigno, on behalf of the INTEGRAL SPI-ACS GRB team, report: The short-duration GRB 200224C (The Fermi GBM team, GCN Circ. 27178) has been detected by Fermi (GBM trigger 604231129) and INTEGRAL (SPI-ACS), so far, at about 35925 s UT (09:58:45). We have triangulated this GRB to a GBM-INTEGRAL annulus centered at RA(2000)=205.247 deg (13h 40m 59s) Dec(2000)=+54.669 deg (+54d 40' 10"), whose radius is 82.665 +/- 2.948 deg (3 sigma). The IPN localization is consistent with, but reduces the area of, the Fermi GBM one. This localization may be improved. A triangulation map is posted at http://www.ioffe.ru/LEA/GRBs/GRB200224_T35924/IPN/