Coronal Heating Diagnostics from EUNIS 2013

The Extreme Ultraviolet Normal Incidence Spectrograph (EUNIS) sounding rocket instrument obtained high-resolution observations of the solar spectrum from 30-37 nm and 52-63 nm on 23 April 2013, in co-ordination with observations by the Dunn Solar Telescope/IBIS, Hinode/EIS, SoHO/CDS, RHESSI and SDO. The broad spectral coverage and unprecedented dynamic range of the EUNIS observations includes emission lines of ionization stages from He I to Fe XX, and thus a wide temperature range of 0.03 to 10 MK. The observations captured a B-class flare in active region NOAA 11726 as well as active regions 11723, 11724, off-limb, and quiet sun. Fe XIX observations in non-flaring regions and lower-temperature density diagnostics (e.g., Fe XIV, XIII, XII, Si X, O IV) are presented, and implications for impulsive heating mechanisms are discussed.