GCN Circular 29930
A. Y. Lien (GSFC/UMBC), A. P. Beardmore (U Leicester), and K. L. Page (U Leicester) report on behalf of the Neil Gehrels Swift Observatory Team: We received further data from recent telemetry downlink. The trigger time for GRB 210504A (Swift trigger #1046782; Beardmore et al., GCN Circ. 29929) is 2021-05-04T13:54:53 UTC. Based on currently available data from T-60 to T+63 sec, the burst duration is longer than 50 seconds.