Spectral properties

Spectral properties derived from observations

View the source on GitHub

Properties

* = required

Name	Type	Description
best_fit_model	string	Name of model corresponding to best statistical fit of spectrum Options: PowerLaw, CutoffPowerLaw, Band
power_law	PowerLaw.schema.json	Fit parameters for PowerLaw model
cutoff_power_law	CutoffPowerLaw.schema.json	Fit parameters for Cutoff PowerLaw model
band	Band.schema.json	Fit parameters for Band model
flux	number	Flux in the specified flux_unit
flux_error	number	1-sigma uncertainty in flux in specified flux_unit
flux_unit	string	Units for the measured flux, default unit is [erg/cm2/s] Options: ph/cm2/s, erg/cm2/s
limiting_flux	number	Limiting flux (upper limit) in flux_unit
limiting_flux_sigma	number	Significance level [sigma] of the limiting flux. Default is 5 (5-sigma upper limit).
flux_spectral_band	array	Low and High energy bounds used in flux calculation (if not parsed in Reporter.schema)
flux_spectral_unit	string	Units for the flux energy band (if not parsed in Reporter.schema), default is [keV] Options: keV, nm, MHz
flux_time_range	array	Start and stop time stamps used in flux calculation (if not parsed in DateTime.schema.json), measured since trigger [s]
flux_density	number	Flux density in the specified flux_density_unit
flux_density_error	number	1-sigma uncertainty on flux density
limiting_flux_density	number	Limiting flux density (upper limit) in flux_density_unit
limiting_flux_density_sigma	number	Significance level [sigma] of the limiting flux density. Default is 5 (5-sigma upper limit).
flux_density_unit	string	Unit of the flux density: frequency-based [erg/cm2/s/Hz], energy-based [erg/cm2/s/keV], or wavelength-based [erg/cm2/s/nm]. Default is [erg/cm2/s/keV]. Options: erg/cm2/s/Hz, erg/cm2/keV, erg/cm2/s/nm
flux_density_spectral_point	number	Flux density at a specific spectral point in the specified flux_density_spectral_point_unit
flux_density_spectral_point_unit	string	Unit of the flux density spectral point, default is [keV] Options: keV, nm, MHz
flux_density_time_range	array	Start and stop time stamps used in flux density calculation (if not parsed in DateTime.schema.json), measured since trigger [s]
fluence	number	Fluence [erg/cm2]
fluence_error	number	1-sigma uncertainty on Fluence
fluence_spectral_band	array	Low and High energy bounds used in fluence calculation, in unit of [keV]
fluence_time_range	array	Start and stop time stamps used in fluence calculation (if not parsed in DateTime.schema), measured since trigger [s]

Example

{
  "$schema": "https://gcn.nasa.gov/schema/v7.0.0/gcn/notices/core/Spectral.schema.json",
  "best_fit_model": "PowerLaw",
  "power_law": {
    "amplitude": 0.05,
    "amplitude_error": 0.01,
    "pivot_energy": 1,
    "alpha": 1.85,
    "alpha_error": 0.12
  },
  "flux": 0.0000015,
  "flux_error": 5e-8,
  "flux_unit": "ph/cm2/s",
  "flux_spectral_band": [
    10,
    1000
  ],
  "flux_spectral_unit": "keV",
  "flux_time_range": [
    0,
    20
  ],
  "flux_density": 9.5e-7,
  "flux_density_error": 1.1e-7,
  "flux_density_unit": "erg/cm2/keV",
  "flux_density_spectral_point": 100,
  "flux_density_spectral_point_unit": "keV",
  "flux_density_time_range": [
    0,
    10
  ],
  "fluence": 0.0000025,
  "fluence_error": 9e-7,
  "fluence_spectral_band": [
    10,
    1000
  ],
  "fluence_time_range": [
    0,
    50
  ]
}