{"name":"GW230831_134621","grace_id":"S230831bn","run":"O4a","gcn_notice":"https://gcn.gsfc.nasa.gov/notices_l/S230831bn.lvc","gcn_circular":"https://gcn.nasa.gov/circulars?query=S230831bn","aliases":["GW230831_134621"],"versions":[{"version":1,"catalog":"GWTC-4.0","detail_url":"https://gwosc.org/api/v2/event-versions/GW230831_134621-v1?format=json"}]}