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Table C.1.

Some of the key input parameters used in Molecfit.

Parameter key Value Description
LIST_MOLEC H2O, O2 List of molecules to be included in the model.
WAVE_INCLUDE 0.6890,0.6900, 0.7160,0.7340, 0.7590,0.7770 Wavelength ranges to be included.
WLG_TO_MICRON 0.0001 Multiplicative factor applied to the wavelength to express it in micrometres.
WAVELENGTH_FRAME VAC_RV Wavelength reference frame.
FTOL 1e-8 Relative chi-square convergence criterion.
XTOL 1e-8 Relative parameter convergence criterion.
FIT_CONTINUUM 1 Flag to enable/disable the polynomial fit of the continuum.
CONTINUUM_N 4 Degree of the polynomial continuum fit to use per range.
FIT_RES_GAUSS True Fit resolution by Gaussian.
RES_GAUSS 3.5 Initial value for FWHM of the Gaussian in pixels, at the centre of the spectrum.
LNFL_LINE_DB updated_aer_v_3.6a File name of the line list

Notes. Descriptions taken from the Molecfit Pipeline User Manual at https://ftp.eso.org/pub/dfs/pipelines/instruments/molecfit/molecfit-pipeline-manual-4.1.pdf. aFrom private communication with Romain Allart due to duplicated lines in the aer3.6 line list (Allart et al. 2017, 2020).

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