Class LineList

Creating a LineList object.

Parameters:

• fn (str) - The full path and filename to the spectroscopy file. Must contain either the CDMS or the JPL string.
• x_min (float) - Minimum value for reading data in frequency/wavelength If default, the lowest frequency is the one in the file.

  (default: 1e-10)

• x_max (float) - Maximum value for reading data in frequency/wavelength If default, the highest frequency is the one in the file

  (default: 1e10)

• unit (string) - Unit of x_min/x_max (micron,GHz,MHz,Hz). Any astropy.constants unit works. This can also be a Unit() class object.

  (default: 'micron')

• min_strength (float) - if None all are included, else only lines with strengths above this value are included (log scale, nm2*Mhz)

  (default: None)

• max_exc (float) - if None all are included, else only lines with excitation energies below this value are included (cm-1)

  (default: None)

Return an integer matching the given string from the catalog (to deal with 'A#' numerals).

Parameters:

• numeral (string) - The numeral to be converted to integer

Make a list of transitions from the line list that was read.

Default transitions parameters are the same as those used in Transition.Transition.__init__().

Requires a Molecule() object to be passed to the method call.

Parameters:

• molecule (Molecule()) - The molecule for these transitions
• telescope (string) - The telescope that observed given line

  (default: None)

• offset (float) - The offset from center pixel of observed transition

  (default: None)

• n_quad (int) - The number of grid points in the formal integration when calculating the line profile in sphinx.

  (default: 100)

• fraction_tau_step (float) - tau_total*fraction_tau_step gives min. delta_tau in strahl.f. If too low, min_tau_step will be used.

  (default: 1e-2)

• min_tau_step (float) - minimum of delta_tau in strahl.f

  (default: 1e-4)

• write_intensities (bool) - set to 1 to write the intensities of first 50 impact-parameters at the end of sphinx

  (default: 0)

• tau_max (float) - maximum optical depth used for the calculation of the formal integral

  (default: 12.)

• tau_min (float) - maximum optical depth used for the calculation of the formal integral

  (default: -6.)

• check_tau_step (float) - check.par.in sphinx if step in tau not too large

  (default: 0.01)

Returns: list[Transition]

The transitions