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The New Sun - Probing Solar Plasmas with the SUMER Instrument on SOHO

Curdt, W.

With the SUMER (Solar Ultraviolet Measurements of Emitted Radiation) spectrometer on SOHO we observe the solar atmosphere with high spectral, spatial, and temporal resolution in the 400 to 1600 Å wavelength range. Selected observational facts are presented. Among these are points concerning the solar EUV spectrum in general, such as line identific…

The preparation and use of atomic data for the SOHO mission.

Lang, J.

An overview of the SOHO mission is given, including brief descriptions of the major spectroscopic instruments CDS and SUMER. The range of ions whose spectra will be observed is discussed in the context of available fundamental atomic data, principally energy levels, transition probabilities and electron excitation rate coefficients. The use of ADA…