CALFLUX Flux calibration results

Name

Format

Units

Measure

Comments

Columns

Key

CAL_DATA_ID

Int Calibration data identifier

CAL_REDUCTION_ID

Int Calibration reduction identifier

SOURCE_ID

Int Source identifier

SPECTRAL_WINDOW_ID

Int Spectral window identifier

Data description

NUM_FREQ

Int Number Nfpt of frequencies to which parameters are provided

NUM_STOKES

Int Number of stokes parameters Nsto

Data

START_VALID_TIME

Double s EPOCH Start time of result validity period

END_VALID_TIME

Double s EPOCH End time of result validity period

STOKES

Int( Nsto) List of Stokes parameters

FREQUENCY

Double( Nf) Hz FREQUENCY Frequencies at which the fluxes are measured

FREQUENCY_INTERVAL

Double( Nf) Hz FREQUENCY Freq. intervals over which the Nfptfluxes are measured

FLUX

Double( Nsto, Nfpt) Jy Measured flux densities

FLUX_ERR

Double( Nsto, Nfpt) Jy Uncertainties on flux densities

(SIZE)

Double(2 Nsto, Nfpt) rad Measured sizes

(SIZE_ERR)

Double(2 Nsto, Nfpt) rad Measured size uncertainties

(PA)

Double( Nsto, Nfpt) rad Measured position angles

(PA_ERR)

Double( Nsto, Nfpt) rad Position angle uncertainties

FLUX_METHOD

String Method used


Notes: This table contains the result of a Flux measurement. Can be attached e.g. to the result of an amplitude calibration.
CAL_DATA_ID
Calibration data identifier
CAL_REDUCTION_ID
Calibration reduction identifier
ANTENNA_ID
Antenna identifier
SPECTRAL_WINDOW_ID
Spectral window identifier. A value of -1 indicates the row is valid for all spectral windows.
START_VALID_TIME
Start time of result validity period
END_VALID_TIME
End time of result validity period
NUM_FREQ
The number of frequencies at which the flux is measured. Useful in case of very wide band (e.g. DSB) calibrations.
NumStokes
The number of Stokes parameters measured (e.g. 1, 2, 4).
STOKES
The list of Stokes parameters measured (with the standard axis FITS convention:  copy it here)
FREQUENCY
List of frequencies at which the fluxes are measured.
FREQUENCY_INTERVAL
Frequency intervals used to determine these Nfptfluxes.
FLUX
Results of flux measurement
FLUX_ERR
one-sigma uncertainties on flux measurement
SIZE
Source size (Gaussian model unless otherwise stated)
SIZE_ERR
one-sigma uncertainties on source size
FLUX_METHOD
Method used e.g. “ApertureEfficiency” (discarding the few best and worse antennas), fit in UV plane, ...