//////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 33344 SUBJECT: GRB 230218A: Fermi GBM Final Real-time Localization DATE: 23/02/18 15:56:53 GMT FROM: Fermi GBM Team at MSFC/Fermi-GBM The Fermi GBM team reports the detection of a likely LONG GRB At 15:46:27 UT on 18 Feb 2023, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 230218A (trigger 698427992.71955 / 230218657). The on-ground calculated location, using the Fermi GBM trigger data, is RA = 39.6, Dec = 55.1 (J2000 degrees, equivalent to J2000 02h 38m, 55d 06'), with a statistical uncertainty of 16.0 degrees. The angle from the Fermi LAT boresight is 10.0 degrees. The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230218657/quicklook/glg_skymap_all_bn230218657.png The HEALPix FITS file, including the estimated localization systematic, can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230218657/quicklook/glg_healpix_all_bn230218657.fit The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230218657/quicklook/glg_lc_medres34_bn230218657.gif //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 33345 SUBJECT: GRB 230218A is not a GRB DATE: 23/02/19 01:34:07 GMT FROM: Suraj Poolakkil at UAH S. Poolakkil (UAH) reports on behalf of the Fermi Gamma-ray Burst Monitor Team: "The Fermi Gamma-ray Burst Monitor (GBM) trigger 698427992/230218657 at 15:46:27.72 UT on 18 February 2023, tentatively classified as GRB 230218A (GCN 33344), is in fact not due to a GRB. This trigger is likely due to LS V +44 17 / RX J0440.9+4431."