{"name":"GW190531_023648","grace_id":"S190531n","run":"O3a","gcn_notice":"https://gcn.gsfc.nasa.gov/notices_l/S190531n.lvc","gcn_circular":"https://gcn.nasa.gov/circulars?query=S190531n","aliases":["GW190531_023648"],"versions":[{"version":1,"catalog":"GWTC-2.1-marginal","detail_url":"https://gwosc.org/api/v2/event-versions/GW190531_023648-v1?format=json"}]}