GCN Alert: Messaggio GCN inviato alle 2025-06-27 21:47:42: S250627y Most probable sky…

{
    "alert_type": "PRELIMINARY",
    "time_created": "2025-06-27T19:47:36Z",
    "superevent_id": "S250627y",
    "urls": {
        "gracedb": "https://gracedb.ligo.org/superevents/S250627y/view/"
    },
    "event": {
        "significant": false,
        "time": "2025-06-27T19:47:10.589Z",
        "far": 4.365474808309955e-7,
        "instruments": [
            "H1",
            "L1",
            "V1"
        ],
        "group": "CBC",
        "pipeline": "spiir",
        "search": "AllSky",
        "properties": {
            "HasNS": 0.2959437157031003,
            "HasRemnant": 0,
            "HasMassGap": 0.006666666666666666
        },
        "classification": {
            "BBH": 0.4306015061899346,
            "BNS": 0,
            "NSBH": 0.015849658993431447,
            "Terrestrial": 0.553548834816634
        },
        "duration": null,
        "central_frequency": null
    },
    "external_coinc": null
}