CHIME/FRB Alert

Fast radio burst alert from the Canadian Hydrogen Intensity Mapping Experiment.

View the source on GitHub

Properties

* = required

Name	Type	Description
known_source	string	Transient Name Server name of the known source (if a repeating FRB source)
snr	number	Signal-to-noise ratio of the burst [dimensionless]
trigger_time_inf_freq	string	Time of the trigger at infinite frequency [ISO 8601]
trigger_time_inf_freq_error	number	Error on the trigger time at infinite frequency [s]
importance	number	A machine learning score separating RFI (0) from an astrophysical signal (1)
association_probability	number	A score of known source association probability from poorly associated (0) to confidently associated (1)
npol	number	The number of polarizations of the real-time FRB search
tsys	number	The system temperature of the real-time FRB search [K]
update_message	string	Message to be included in an update alert
dm_gal_ne_2001_max	number	Estimated contribution to the dispersion measure [pc/cm^3] from the Galaxy using the NE2001 model.

Properties from all of the following:

These properties are inherited using the allOf syntax. In order to validate, all of the following schemas must be individually valid, based on their respective properties. See allOf for more information.

Name		Description
Alert.schema.json		core schema object (click to expand)
Reporter.schema.json		core schema object (click to expand)
Event.schema.json		core schema object (click to expand)
DateTime.schema.json		core schema object (click to expand)
Localization.schema.json		core schema object (click to expand)
DispersionMeasure.schema.json		core schema object (click to expand)

Example

{
  "$schema": "https://gcn.nasa.gov/schema/v4.4.0/gcn/notices/chime/frb.schema.json",
  "alert_type": "initial",
  "trigger_time": "2024-09-18T07:19:10.765268Z",
  "trigger_time_error": 0.00786431,
  "id": "427325191",
  "snr": 12.698559761047363,
  "ra": 346.77850859547,
  "dec": 12.632485229956252,
  "ra_dec_error": [
    0.503806986334273,
    0.598921231135782,
    0
  ],
  "dm": 279.422607421875,
  "dm_error": 0.40437427163124,
  "dm_gal_ne_2001_max": 37.78909399600771,
  "trigger_time_inf_freq": "2024-09-18 07:19:03.518831+00:00",
  "trigger_time_inf_freq_error": 0.013108099559195993,
  "importance": 0.9871308604784662,
  "sampling_time": 0.983,
  "spectral_band": [
    400,
    800
  ],
  "units": "MHz",
  "npol": 2,
  "tsys": 50,
  "description": "This alert was generated automatically by the CHIME/FRB Real-time Search Pipeline."
}