GCN Alert: Messaggio GCN inviato alle 2025-08-20 11:57:14:S250818k Most probable sky location…

{
    "alert_type": "UPDATE",
    "time_created": "2025-08-20T09:57:08Z",
    "superevent_id": "S250818k",
    "urls": {
        "gracedb": "https://gracedb.ligo.org/superevents/S250818k/view/"
    },
    "event": {
        "significant": true,
        "time": "2025-08-18T01:20:06.030Z",
        "far": 6.81022356082428e-8,
        "instruments": [
            "H1",
            "L1",
            "V1"
        ],
        "group": "CBC",
        "pipeline": "pycbc",
        "search": "AllSky",
        "properties": {
            "HasNS": 0.8005802098765431,
            "HasRemnant": 0.8005802098765431,
            "HasMassGap": 0.07074074074074074,
            "HasSSM": 1
        },
        "classification": {
            "BNS": 0.29453192149752927,
            "NSBH": 0,
            "BBH": 0,
            "Terrestrial": 0.7054680785024707
        },
        "duration": null,
        "central_frequency": null
    },
    "external_coinc": null
}