GCN Alert: Messaggio GCN inviato alle 2025-06-21 04:45:34: S250621i Most probable sky…

{
    "alert_type": "PRELIMINARY",
    "time_created": "2025-06-21T02:45:28Z",
    "superevent_id": "S250621i",
    "urls": {
        "gracedb": "https://gracedb.ligo.org/superevents/S250621i/view/"
    },
    "event": {
        "significant": false,
        "time": "2025-06-21T02:45:04.624Z",
        "far": 2.113747774980431e-5,
        "instruments": [
            "H1",
            "L1",
            "V1"
        ],
        "group": "CBC",
        "pipeline": "gstlal",
        "search": "AllSky",
        "properties": {
            "HasNS": 0,
            "HasRemnant": 0,
            "HasMassGap": 0.012110860154338415
        },
        "classification": {
            "BBH": 0.04863066769990853,
            "BNS": 2.517100558665975e-17,
            "NSBH": 2.4612962154428577e-12,
            "Terrestrial": 0.9513693322976301
        },
        "duration": null,
        "central_frequency": null
    },
    "external_coinc": null
}