Class: BinaryModelCartesian

Bases: Base

Represent a binary companion using Cartesian sky offsets.

Parameters:

Name	Type	Description	Default
dra	float or array - like	Right-ascension offset in milliarcseconds.	required
ddec	float or array - like	Declination offset in milliarcseconds.	required
flux	float or array - like	Companion-to-primary flux ratio.	required

Notes

This parameterization is useful for optimization and inference workflows that operate directly in Cartesian offsets.

__init__(dra, ddec, flux)

Initialize a binary model in Cartesian offsets.

Parameters:

Name	Type	Description	Default
dra	float or array - like	Right-ascension offset in milliarcseconds.	required
ddec	float or array - like	Declination offset in milliarcseconds.	required
flux	float or array - like	Flux ratio for the companion component.	required

__repr__()

Return a readable representation of binary Cartesian parameters.

unpack_all()

Return all model parameters in Cartesian form.

Returns:

Type	Description
tuple[array - like, array - like, array - like]	Tuple (dra, ddec, flux).

model(u, v, wavel)

Evaluate complex visibilities for this Cartesian binary model.

Parameters:

Name	Type	Description	Default
u	array - like	Baseline u coordinates in meters.	required
v	array - like	Baseline v coordinates in meters.	required
wavel	array - like	Effective wavelength(s) in meters.	required

Returns:

Type	Description
array - like	Complex visibility samples on the provided baselines.