TITLE: GCN CIRCULAR NUMBER: 21663 SUBJECT: LIGO/VIRGO G298936: Fermi GBM Observations DATE: 17/08/23 18:20:31 GMT FROM: Rachel Hamburg at UAH LIGO/VIRGO G298936: Fermi GBM Observations R. Hamburg (UAH) reports on behalf of the GBM-LIGO Group: L. Blackburn (CfA), M. S. Briggs (UAH), J. Broida (Carleton College), E. Burns (NASA/GSFC), J. Camp (NASA/GSFC), T. Dal Canton (NASA/GSFC), N. Christensen (Carleton College), V. Connaughton (USRA), A. Goldstein (USRA), C. M. Hui (NASA/MSFC), P. Jenke (UAH), D. Kocevski (NASA/MSFC), N. Leroy (LAL), T. Littenberg (NASA/MSFC), J. McEnery (NASA/GSFC), R. Preece (UAH), J. Racusin (NASA/GSFC), P. Shawhan (UMD), K. Siellez (GATech), L. Singer (NASA/GSFC), J. Veitch (Birmingham), P. Veres (UAH), and C. Wilson-Hodge (NASA/MSFC) At the time of the LIGO/Virgo candidate G298936, Fermi was passing through the South Atlantic Anomaly; therefore the GBM detectors were disabled. Upper limits on persistent emission over 48-hour period centered on the LIGO/VIRGO trigger time using the Earth Occultation technique (Wilson-Hodge et al. 2012, ApJS, 201, 33) will be forthcoming.