scopesim_targets.point_source.PointSourceTarget

class scopesim_targets.point_source.PointSourceTarget(position: SkyCoord | tuple[float, float] | Mapping[str, float | Quantity] | None = None, spectrum: SourceSpectrum | SpectralType | str | None = None, brightness: Any | None = None)

Bases: SpectrumTarget

Base class for Point Source Targets.

__init__(position: SkyCoord | tuple[float, float] | Mapping[str, float | Quantity] | None = None, spectrum: SourceSpectrum | SpectralType | str | None = None, brightness: Any | None = None) → None

Methods

__init__([position, spectrum, brightness])
redshift_spectrum(spectrum, position)	Doppler shift spectrum based on position z or v_rad.
resolve_position([parent_position])	Resolve target position or offset.
resolve_spectrum(spectrum[, brightness])	Create SpeXtrum instance from spectrum identifier.
source_spectra([start])	Create spectra dict for Source conversion.
to_source()	Convert to ScopeSim Source object.
to_table([local_frame])	Convert to table for Source conversion.

Attributes

brightness	Target brightness information.
offset	Target offset from parent.
position	Target position (center) as SkyCoord.
spectrum	Target spectral information.

property brightness: Brightness

Target brightness information.

property offset: dict

Target offset from parent.

property position: SkyCoord

Target position (center) as SkyCoord.

static redshift_spectrum(spectrum: Spextrum, position: SkyCoord) → Spextrum

Doppler shift spectrum based on position z or v_rad.

resolve_position(parent_position: SkyCoord | None = None)

Resolve target position or offset.

This uses the following lookup order: 1. self.position set? -> use that 2. parent position present?

1. self.offset set? -> resolve offset to parent position

2. otherwise use parent position

3. self.offset set, but no parent position present -> Error

4. default to (0, 0)

Parameters:

parent_position (SkyCoord | None, optional) – Position of any parent target. If None (the default), self.offset must not be set.

Raises:

ValueError – Raised if self.offset set, but parent_position is None.

Returns:

position – Resolved position as SkyCoord object.

Return type:

SkyCoord

static resolve_spectrum(spectrum: SourceSpectrum | SpectralType | str, brightness: Brightness | None = None) → SourceSpectrum

Create SpeXtrum instance from spectrum identifier.

Can resolve a SpectralType instance (next-closest available template spectrum) or a string that is a valid entry in the SpeXtrum database.

Todo

Actually implement this “next-closest available template”, see #68.

Return type:

Spextrum

source_spectra(start: int = 0) → dict[int, SourceSpectrum]

Create spectra dict for Source conversion.

property spectrum: SourceSpectrum | SpectralType | str

Target spectral information.

to_source() → Source

Convert to ScopeSim Source object.

to_table(local_frame=None) → Table

Convert to table for Source conversion.