fit_spectrum

sitelle.fit.fit_spectrum(spec, theta, v_guess, cube, lines=None, **kwargs)

Helper function to simplify fitting, with some default parameters being already set. The underlying method is orcs.core.HDFCube.fit_lines_in_spectrum.

Parameters:
  • spec (1D ndarray) – The spectrum containing emission lines
  • theta (float) – Theta value corresponding to the spec
  • v_guess (float) – Velocity guess on the spectrum
  • cube (SpectralCube) – The cube from which spec has been extracted
  • lines (str) – (Optional) The lines to fit. Default is set to the main lines contained in the filter of the cube. See sitelle.constants.SN2_LINES and sitelle.constants.SN3_LINES
  • kwargs (dict) –

    Any additional argumebnts to be passed to _prepare_input_params. Some are set to default values :

    Parameter Value
    fmodel ’sinc’
    pos_def ‘1’
    signal_range filter_range
    pos_cov v_guess
    snr_guess ’auto’
    nofilter True
Returns:

the performed fit
Return type:

fit