SUMER Spectral Atlas

SUMER Spectral Atlas

(W. Curdt) 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). Resolved 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, b: approx. 3 10⁵ K, c: approx. 4 10⁵ K, d: 6 10⁵ to 9 10⁵ K, e: approx. 1.4 10⁶ K, f: approx. 1.8 10⁶ K. The vertical axis is scaled to mW sr¯¹ m¯² ů¹; 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 line list will be available at http://cdsweb.u-strasbg.fr/Simbad.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:

• 660 to 700 Å / 700 to 740 Å
• 740 to 780 Å / 780 to 820 Å
• 820 to 860 Å / 860 to 900 Å
• 900 to 940 Å / 940 to 980 Å
• 980 to 1020 Å / 1020 to 1060 Å
• 1060 to 1100 Å / 1100 to 1140 Å
• 1140 to 1180 Å / 1180 to 1220 Å
• 1220 to 1260 Å / 1260 to 1300 Å
• 1300 to 1340 Å / 1340 to 1380 Å
• 1380 to 1420 Å / 1420 to 1460 Å
• 1460 to 1500 Å / 1500 to 1540 Å
• 1540 to 1580 Å / 1580 to 1620 Å