Notes. The lines are classified as “strong” (S) or “weak” (W). The “References” indicate whether the line has been observed in the 2013 outburst (H14; Holoien et al. 2014), or in EX Lupi, either in outburst (SA12; Sicilia-Aguilar et al. 2012) or quiescence (SA15; Sicilia-Aguilar et al. 2015). Uncertain classifications (due to several lines being consistent with the same wavelength, or to mismatches between observed and potential laboratory wavelengths) are marked with “Unc.”. For some of these lines, a second possible species may be responsible: these are given in the “Comments” column. Lines that appear blended with others are labeled as “Ble.”. Lines that could not be associated with any known transition are listed as “INDEF”. Lines affected by atmospheric contamination are marked with “Atm.”, and INDEF lines observed in EX Lupi are also labeled. Finally, lines for which the strong, wind-related blue-shifted absorption is seen are marked with “BA”.