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componentlist.addcomponent - Function

1.2.1 Add a component to the list


Description

The addcomponent function is a convenience function that ties together the simulate function, and the various set functions. This function adds a component to the end of the list. For a description of the arguments see the following functions.

flux, fluxunit, polarization
See the setflux function.
ra, raunit, dec, decunit
See the setrefdir function.
dirframe
See the setrefdirframe function.
shape, majoraxis, minoraxis, positionangle
See the setshape function.
freq
A frequency quantity which is split into a value and units and passed to the setfreq function.
freqframe
See the setfreq function.
spectrumtype, index
The spectral index α such that flux density S as a function of frequency ν is given by the formula: S να

See the setspectrum function.

OR

setspectrum

label
See the setlabel function.

Arguments





Inputs

flux

The flux value. A vector with four real or complex numbers

allowed:

any

Default:

fluxunit

The units of the flux. Any string with the same dimensions as the Jansky

allowed:

string

Default:

Jy

polarization

The polarization of the value field. “Stokes”, “linear” or “circular”

allowed:

string

Default:

Circular

Linear

Stokes

dir

The direction measure of the source, it can a be any direction measure from the measures tool or a string of the type ’J2000 10h30m00 -20d00m00.0’ or a vector of strings of the type [’J2000’, ’10:30:00.00’, ’-20.00.00.0’]. Basically the string or strings should have the direction frame and quantities for Ra and Dec

allowed:

any

Default:

J2000 00h00m00.0 90d00m00.0

shape

The new shape type. A string that is either ’point’, ’Gaussian’, ’disk’, or ’limbdarkeneddisk’

allowed:

string

Default:

disk

limbdarkeneddisk

Gaussian

point

majoraxis

The width (FWHM in the case of a Gaussian) of the larger axis. A quantity with angular units

allowed:

any

Default:

2.0arcmin

minoraxis

The width (FWHM in the case of a Gaussian) of the smaller axis. A quantity with angular units

allowed:

any

Default:

1.0arcmin

positionangle

The rotation of the axes with respect to the reference frame. A quantity with angular units

allowed:

any

Default:

0.0deg

freq

The reference frequency. A quantity with units equivalent to the ’Hz’ and frame or a frequency measure, e.g [’TOPO’, ’1.6GHz’], or simply default frame (LSRK) ’1.6GHz’

allowed:

any

Default:

LSRK 1.415GHz

spectrumtype

The spectrum type, a string that is either ’constant’ or ’spectral index’

allowed:

string

Default:

spectral index

constant

index

The spectral index

allowed:

double

Default:

1.0

optionalparms

optional parameters in vector (currently only used for limbdarkeneddisk)

allowed:

doubleArray

Default:

0.0

label

The label for the component

allowed:

string

Default:

Returns
bool
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