available from other sources. HITEMP [@jt480] in principle provides a source of data for CO, OH, NO and CO$_2$. In practice there are new hot line lists for CO [@15LiGoRo.CO], OH [@16BrBeWe.OH], and CO$_2$ [@11TaPe.CO2; @14HuGaFr.CO2] which are more recent than the data given in the current release of HITEMP. High quality line lists for ozone are also available from elsewhere [@13BaMiSt.O3]. Line lists for some other missing species may also be found in the UGAMOP (https://www.physast.uga.edu/ugamop/) and Kurucz [@11Kurucz.db] databases. The coverage of these databases for a (possible) exoplanet characterization mission has recently been reviewed by two of us [@jt578].

Finally we note that while the majority of exoplanet spectroscopy is performed at rather low resolution, very precise spectroscopic data can be required [@13DeBrSn.exo; @13BiDeBr.exo; @14BrDeBi.exo], which is proving an issue for particular key species [@15HoDeSn.TiO]. Therefore, ExoMol aims to be both complete, and as accurate as possible.

Individual line lists
=====================

Below we consider some of the line lists presented in the ExoMol database and listed in Tables \[tab:exomoldata\] and \[tab:otherdata\]. We restrict our discussion to issues not covered in the original publication.

One general issue is that Medvedev and co-workers [@highv; @15LiGoRo.CO] identified a numerical problem with 