  A publicly available database of opacities for molecules of astrophysical
interest, ExoMolOP, has been compiled for over 80 species, based on the latest
line list data from the ExoMol, HITEMP and MoLLIST databases. These data are
generally suitable for characterising high temperature exoplanet or cool
stellar/substellar atmospheres, and have been computed at a variety of
pressures and temperatures, with a few molecules included at room-temperature
only from the HITRAN database. The data are formatted in different ways for
four different exoplanet atmosphere retrieval codes; ARCiS, TauREx, NEMESIS and
petitRADTRANS, and include both cross-sections (at R~=~$\frac{\lambda}{\Delta
\lambda}$~=~15,000) and k-tables (at R~=~$\frac{\lambda}{\Delta
\lambda}$~=~1000) for the 0.3~-~50$\mu$m wavelength region. Opacity files can
be downloaded and used directly for these codes. Atomic data for alkali metals
Na and K are also included, using data from the NIST database and the latest
line shapes for the resonance lines. Broadening parameters have been taken from
the literature where available, or from those for a known molecule with similar
molecular properties where no broadening data are available. The data are
available from www.exomol.com.
