GCN Alert: Messaggio GCN inviato alle 2026-03-22 01:07:14:

{
    "alert_type": "RETRACTION",
    "time_created": "2026-03-22T00:07:14Z",
    "superevent_id": "MS260321x",
    "urls": {
        "gracedb": "https://gracedb.ligo.org/superevents/MS260321x/view/"
    },
    "event": null,
    "external_coinc": null
}