Superevent Vo Event

HTTP 200 OK
Allow: GET, HEAD, OPTIONS
Cache-Control: max-age=0, no-cache, no-store, must-revalidate
Content-Type: application/json
Expires: Sat, 06 Mar 2021 01:23:33 GMT
Vary: Accept

{
    "voevent_type": "UP",
    "file_version": 0,
    "ivorn": "ivo://gwnet/LVC#S190828j-4-Update",
    "created": "2019-09-29 06:36:18 UTC",
    "issuer": "emfollow",
    "filename": "S190828j-4-Update.xml",
    "N": 4,
    "links": {
        "self": "https://gracedb.ligo.org/api/superevents/S190828j/voevents/4/",
        "file": "https://gracedb.ligo.org/api/superevents/S190828j/files/S190828j-4-Update.xml,0"
    }
}