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Source standards for the radiometric calibration of astronomical telescopes in the VUV spectral range.
Huber, M. C. E.; Hollandt, J.; Kuehne, M. +1 more
On the basis of a high-current hollow-cathode discharge we have developed two transfer source standards suitable for the radiometric calibration of vacuum ultraviolet (VUV) telescopes. The source standards are transportable and (in their current design) produce a collimated beam of 5 and 10mm diameter. By irradiating the entrance aperture of the t…
EUV spectral lines from solar wind source regions: The resonance doublets of N V, MG X and SI XII, and the Fe XII λ1242 forbidden line.
Spadaro, D.; Ventura, R.
We present numerical simulations of intensities and profiles of the N V λ1239 and λ 1243, Mg X λ610 and λ625, Si XII λ499 and λ521, and Fe XII λ1242 lines expected from an equatorial and polar coronal hole at solar minimum, when observed on the plane of the sky in the 1.2Rsun_-8Rsun_ range of heliocentric distance. The radial…