Fermi-LAT Flare Advocate Alert
This schema is to alert the scientific community about a flare. It gives information about the position, time, flux, photon index and the presence of high-energy photons.
View the source on GitHub
Properties
* = required
| Name | Type | Description |
|---|---|---|
| $schema | string | |
| reference_catalog | string | Fermi-LAT catalog used to compare the observed flux with a reference flux |
| flux_ratio | number | Factor by which the flux has increased with respect to the average flux in the given reference_catalog entry |
| TS | number | Test Statistic for detection of the source. TS is approximately equal to the square of the detection significance in Gaussian sigma (TS ≈ significance^2) for one degree of freedom |
Properties from all of the following:
These properties are inherited using the allOf syntax. In order to validate, all of the following schemas must be individually valid, based on their respective properties. See allOf for more information.
| Name | Description | |
|---|---|---|
| Alert.schema.json | core schema object (click to expand) | |
| DateTime.schema.json | core schema object (click to expand) | |
| Event.schema.json | core schema object (click to expand) | |
| Localization.schema.json | core schema object (click to expand) | |
| Reporter.schema.json | core schema object (click to expand) | |
| Spectral.schema.json | core schema object (click to expand) | |
| PowerLaw.schema.json | models schema object (click to expand) | |
Example
{
"$schema": "https://gcn.nasa.gov/schema/v7.2.3/gcn/notices/fermi/lat/flare.schema.json",
"alert_datetime": "2025-11-21T00:00:00",
"mission": "Fermi",
"instrument": "LAT",
"event_name": "OQ 334",
"ra": 215.62657,
"dec": 32.38623,
"observation_start": "2025-11-20T00:00:00.0",
"observation_stop": "2025-11-21T00:00:00.0",
"flux": 0.0000012,
"flux_error": 1e-7,
"flux_unit": "ph/cm2/s",
"alpha": 2,
"alpha_error": 0.1,
"reference_catalog": "3FGL",
"flux_ratio": 20,
"TS": 45
}