Highly ionized Calcium and Argon X-ray spectra from a large solar flare

K. J. H. Phillips, J. Sylwester, B. Sylwester +5

X-ray lines of helium-like calcium (\ion{Ca}{19}) between 3.17~Å and 3.21~Å and associated \ion{Ca}{18} dielectronic satellites have previously been observed in solar flare spectra…