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Fig. 6


Ly-β spectral line profiles of the photon irradiance during the 1996–2009 years, where λ0 is the Ly-β reference wavelength (102.572 nm): a) data; b) data deconvolved with the SUMER PSF; the helium He ii 102.524 nm line is detected in the blue wing of Ly-β (Ebadi et al. 2009).

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