`Spectrum`¶

class sed_analysis_tools.sed_analysis_tools.Spectrum(x: ndarray, y: ndarray, frac_err: float | ndarray | list = 0.0, seed: int = 0)¶

A class to represent a spectrum, including its wavelength, flux, and errors.

add_noise(frac_err: float | ndarray | list, seed: int = 0) → None¶

Add noise to the spectrum based on fractional flux error.

Parameters:

frac_err (float or np.ndarray or list) – The fractional noise level or array of noise values.
seed (int, optional) – Seed for random noise generation. Default is 0.

Raises:

ValueError – If the noise array length does not match the data length or is not float/list/np.array.

property error_zero: bool¶

Check if the fractional flux error is zero for all values.

property flux: Quantity¶

Convert logarithmic flux values to linear scale in erg/s/Angstrom.

property flux_err: Quantity¶

Calculate the flux error based on fractional flux error.

plot(ax=None, **kwargs) → None¶

Plot the spectrum.

Parameters:

ax (matplotlib.axes.Axes, optional) – The axis to plot on. If None, a new axis is created.
**kwargs (dict) – Additional keyword arguments for the plotting function.

plot_physical(ax=None, **kwargs) → None¶

Plot the spectrum in physical units.

Parameters:

ax (matplotlib.axes.Axes, optional) – The axis to plot on. If None, a new axis is created.
**kwargs (dict) – Additional keyword arguments for the plotting function.

property wavelength: Quantity¶

Convert logarithmic wavelength values to linear scale in Angstroms.

Spectrum¶