N VII Lyman alpha and N VI He beta

Sequence of temperatures: APEC model

The Lyman alpha line is at 24.78
The Helium beta line is at 24.890
The line at 24.85 is Ar XVI (Li-like; excited lower level)

1 keV


0.5 keV


0.3 keV


0.2 keV


0.1 keV


0.05 keV