GCN Alert: Messaggio GCN inviato alle 2026-03-18 21:07:10:

{
    "alert_type": "RETRACTION",
    "time_created": "2026-03-18T20:07:10Z",
    "superevent_id": "MS260318t",
    "urls": {
        "gracedb": "https://gracedb.ligo.org/superevents/MS260318t/view/"
    },
    "event": null,
    "external_coinc": null
}