As of October 2025, stellar files are now stored in ascii files (2-column**): wavelength in microns, stellar flux

The Generic PCM renormalizes the stellar flux according to the top-of-the atmosphere flux prescribed in callphys.def and start/startfi files, so the absolute units of the stellar flux is not important.

Below we describe the input data available:

- spectrum_Sun_2025.dat for the solar spectrum, made from MODTRAN database (by Martin)

- spectrum_Proxima_2016.dat for the spectrum of Proxima Centauri, made from Phoenix BT-Settl database (by Martin), used in Turbet et al. 2016
- spectrum_TRAPPIST1_2022.dat for the spectrum of TRAPPIST-1, provided from the THAI Intercomparisons project, used in Turbet et al. 2022, Sergeev et al. 2022
- spectrum_K2-18_2021.dat for K2-18 stellar spectrum, made from Phoenix BT-Settl database (by Benjamin), used in Charnay et al. 2021
- spectrum_LHS1140_2024.dat for the spectrum of LHS1140, made from Phoenix BT-Settl database (by Martin), used in Cadieux et al. 2024ab


- spectrum_Gliese_581_2011.dat for the spectrum of Gliese 581, from Wordsworth et al. 2010, 2011
- spectrum_GJ644_2013.dat, source unknown
- spectrum_AD_LEO_2013.dat, source unknown


- spectrum_WASP43_2024.dat, from Teinturier et al. 2024
- spectrum_HD189733_2022.dat, source unknown
- spectrum_HD209458_2022.dat, source unknown

- spectrum_Corot2_2022.dat, source unknown
- spectrum_Kepler7_2022.dat, source unknown (this spectrum is the same than the one above, and it should not ... because these are two different stars with different Teff ... Martin: I encourage someone to check before use)


- spectrum_BD_Teff-1600K_2022.dat (brown dwarf spectrum, Teff = 1600K), source unknown
- spectrum_BD_Teff-1000K_2022.dat (brown dwarf spectrum, Teff = 1000K), source unknown


LAST BUT NOT LEAST, we provided in the BT-Settl_stellar_spectra_grid/ repository a grid of stellar spectra (downgraded to R=100 spectral resolution) for stars ranging from Teff=2000 to 7000K, using the Phoenix BT-Settl stellar model grid, from https://svo2.cab.inta-csic.es/theory/newov2/index.php (BT-Settl)


** note 1: old stellar files (see old_stellar_spectra/ directory) can be 2 files of 1 column (wavelength, stellar flux)
