TITLE: GCN GRB OBSERVATION REPORT NUMBER: 3656 SUBJECT: Swift BAT Trigger 146986 is SWIFT J1753.5-0127 DATE: 05/07/21 06:45:33 GMT FROM: David Palmer at LANL D. Palmer (LANL), S. Barthelmy (GSFC), H. Krimm (GSFC/USRA), C. Markwardt (GSFC/UMD), and N. Gehrels (GSFC), on behalf of the BAT-Swift team report: The BAT trigger = 146986, at 05:47:04 UT of 2005-07-21, is the previously-known source SWIFT J1753.5-0127. The corresponding GCN Notice incorrectly identified it as a GRB. Note that the earlier Trigger=146970 is still confidently believed to be GRB 050721A, with X-ray and optical counterparts detected (GCN circulars 3654 (Antonelli et al.), 3655 (Torii et al.)).