The SUMER EUV Atlas in the Spectral Range 670 A - 1498 A

Details The SUMER EUV Atlas in the Spectral Range 670 A - 1498 A The SUMER EUV Atlas in the Spectral Range 670 A - 1498 A

Oct 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999esasp.446..251c&link_type=abstract

8th SOHO Workshop: Plasma Dynamics and Diagnostics in the Solar Transition Region and Corona. Proceedings of the Conference hel

Astronomy and Astrophysics

Astrophysics

2

Scientific paper

An extreme ultraviolet spectral atlas between 660 and 1600 A (first order) of a quiet Sun, a coronal hole, and a Sun spot region has been derived from observations with the SUMER (Solar Ultraviolet Measurements of Emitted Radiation) instrument on SOHO. More than 1000 emission lines are given with the best available identification. The spectra are radiometrically calibrated. Lines in second order are superimposed on this spectrum. The spectral scans include emissions from atoms and ions in the temperature range from 6 000 to 2000 000 K, i.e., continua and emission lines emitted from the lower chromosphere to the corona. This broad wavelength coverage provides an important new diagnostic tool for studying the essential physical parameters throughout the upper solar atmosphere. In particular, the wavelength range shortward of 1100 A as observed by SUMER represents a significant improvement over the spectra produced in the past. A brief description of the data reduction and calibration procedures is given. The absolute intensities are determined with an uncertainty of better than +- 15% in most of the range presented, and the wavelength scale is accurate to better than 0.01 A. The atlas will also be available in machine readable form.

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