GCN Alert: Messaggio GCN inviato alle 2025-06-19 00:08:19: S250618bw Most probable sky…

{
    "alert_type": "PRELIMINARY",
    "time_created": "2025-06-18T22:08:13Z",
    "superevent_id": "S250618bw",
    "urls": {
        "gracedb": "https://gracedb.ligo.org/superevents/S250618bw/view/"
    },
    "event": {
        "significant": false,
        "time": "2025-06-18T22:07:43.820Z",
        "far": 2.267743e-5,
        "instruments": [
            "L1",
            "V1"
        ],
        "group": "CBC",
        "pipeline": "MBTA",
        "search": "AllSky",
        "properties": {
            "HasNS": 1,
            "HasRemnant": 0.687142686129222,
            "HasMassGap": 0.43293435420616544
        },
        "classification": {
            "Terrestrial": 0.999436967,
            "BNS": 0.000312796,
            "BBH": 0,
            "NSBH": 0.000250237
        },
        "duration": null,
        "central_frequency": null
    },
    "external_coinc": null
}