The SUMER solar-disk spectral atlas by Curdt et al. (A&A,
in press, 2001) includes profiles of the average quiet Sun (black),
an equatorial coronal hole (blue), and a sunspot (red). More
Than 1100 emission lines are indicated by a mark, the measured wavelength
in angstrom (Å), and the identification, if available. The marks
point to line lists available in the literature, where additional information
about a specific line can be found. Squares point to Feldman et
al. (ApJS 113, 195, 1997), circles to Curdt et al. (A&AS 126,
281, 1997), diamonds to Kelly (J. Phys. Chem. Ref. Data 16, 1, 1987),
Cohen et al. (ApJS 37, 393, 1978), or Sandlin et al. (ApJS 61, 801, 1986).
Triangles are new lines or identifications. Filled symbols
denote lines observed in first order of diffraction, open symbols
are second-order lines. Only the three least-significant digits of the
wavelength values are given. If available, unidentified lines are characterized
by the temperature classification
a: below 3 105 K,
approx. 3 105 K,
c: approx. 4 105 K,
6 105 to 9 105 K,
e: approx. 1.4 106
f: approx. 1.8 106 K. The vertical axis is scaled
to mW sr¯¹ m¯² Å¯¹; on the left the
radiometric calibration for the first order lines is given, on the right
for second order lines. Note that second-order lines are always superimposed
on a first-order background. We have taken care of the type of photocathode
(bare or KBr) when applying the radiometric calibration to different sections
of the spectrum. We also display in green the BN/CI ratio, which is a useful
parameter for electron temperature classification.
Spectra and a continously updated line list are available at http://www.linmpi.mpg.de/~curdt.
A HTML version of the line list is available at http://vms2.mpae.gwdg.de:1234/file/atlas.html.
Since the images may not be suitable for screen resolution, we provide them as Postscript files (60 to 150 KB size) for colour printers, each of them containing two pages: