{
  "$id": "https://gcn.nasa.gov/schema/main/gcn/notices/core/Reporter.schema.json",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "title": "Reporter",
  "description": "Alert Reporter instrument",
  "type": "object",
  "properties": {
    "mission": {
      "type": "string",
      "description": "Name of Mission or Telescope reporting the event"
    },
    "instrument": {
      "type": "string",
      "description": "Name of the Instrument reporting the event"
    },
    "record_number": {
      "type": "number",
      "description": "Incremental number for messages from the instrument during a given trigger (ex: 1, 2, 3)"
    },
    "messenger": {
      "enum": ["EM", "GW", "Neutrino"],
      "description": "Messenger of report; EM, GW or Neutrino"
    },
    "spectral_band": {
      "type": "array",
      "items": { "type": "number" },
      "description": "Observed spectral band, expressed in the specified 'units' field",
      "minItems": 2,
      "maxItems": 2
    },
    "spectral_band_units": {
      "type": "string",
      "enum": ["keV", "nm", "MHz"],
      "description": "Units for the spectral data; default unit is keV",
      "default": "keV"
    },
    "filter": {
      "type": "array",
      "items": { "type": "string" },
      "description": "Optional filter name, as used in optical observations"
    }
  }
}