Flare lines in Hinode EIS spectra

Abstract

We aim to identify the brightest hot emission lines in Hinode EIS spectra, and suggest the best ones to be used in flare observations. The EIS database was searched in order to find suitable datasets to identify the prominent lines. A B2-class flare spectrum was found. Most previous identifications are confirmed, however some are revised by noting the presence of blending. A new Fe XVII self-blend is identified. A recommended list of emission lines formed at high temperatures is provided. The brightest lines are the Ca XVII 192.85 Å and the Fe XXIV 192 Å, however they are blended. The best unblended lines are the Ca XV 200.99 Å, Fe XVII 269.42 Å and Fe XXIII 263.76 Å lines.