{
  "$id": "https://gcn.nasa.gov/schema/v7.2.1/gcn/notices/maxi/gsc.unknown.schema.json",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "type": "object",
  "unevaluatedProperties": false,
  "title": "MAXI/GSC Unknown Source Position",
  "description": "MAXI/GSC unknown-source detection notice for a GRB or other unknown X-ray transient.",
  "allOf": [
    { "$ref": "../core/Alert.schema.json" },
    { "$ref": "../core/DateTime.schema.json" },
    { "$ref": "../core/Event.schema.json" },
    { "$ref": "../core/GeoLocBase.schema.json" },
    { "$ref": "../core/Localization.schema.json" },
    { "$ref": "../core/Reporter.schema.json" },
    { "$ref": "../core/Statistics.schema.json" },
    { "$ref": "../core/AdditionalInfo.schema.json" },
    { "$ref": "../core/Spectral.schema.json" }
  ],
  "required": ["mission", "alert_datetime"],
  "properties": {
    "$schema": { "type": "string", "format": "uri" },
    "rectangular_error_corners": {
      "type": "array",
      "items": {
        "type": "array",
        "items": { "type": "number" },
        "minItems": 2,
        "maxItems": 2
      },
      "minItems": 4,
      "maxItems": 4,
      "description": "Coordinates of the four corners of the rectangular error box. Each element is a [RA, Dec] pair in degrees in J2000 equatorial coordinates. RA is in the range [0, 360]."
    },
    "flux": {
      "type": "number",
      "description": "X-ray flux of the event in the energy band specified by flux_spectral_band and flux_spectral_unit [erg/cm^2/s]."
    },
    "flux_error": {
      "type": "number",
      "description": "1-sigma statistical uncertainty on flux [erg/cm^2/s]."
    },
    "detection_timescale": {
      "type": "number",
      "description": "Detection time scale of the event; unit specified by detection_timescale_units."
    },
    "detection_timescale_units": {
      "type": "string",
      "enum": ["s", "scan", "orbit", "d"],
      "description": "Unit of detection_timescale: s (seconds), scan (one camera scan), orbit (one ISS orbit), or d (days).",
      "default": "s"
    }
  }
}