Among other solar flux FTS atlases, the Solar Flux Atlas from
296 to 1300 nm (Kurucz et al. 1984), which is available from
the NOAO ftp
site, provided us with a high-quality spectrum of the Sun seen as a
star. It was obtained at the McMath
telescope at Kitt Peak.
The FTS disc-centre spectrum included in the newer Spectral Atlas
of Solar Absolute Disk-Averaged and Disk-Center Intensity from 3290 to
12510 Å (Brault & Neckel 1987; for details see Neckel
1994) was also obtained at the McMath telescope. The wavelengths of
selected lines from the table of Pierce & Breckinridge (1973),
which was produced from observations with a grating spectrometer and a
photographic detector at the same telescope, have been the base for
placing its wavelength calibration on an absolute scale. We have
measured line central wavelengths in this atlas, available to us as
part of the IDL KIS library. A flux spectrum is also contained in this
FTS atlas, which shares the source data obtained by J. Brault and
collaborators with the atlas prepared by Kurucz et al. (1984).
The atlases cited achieve signal-to-noise ratios of about 2500 and a
resolving power 400000. A quantitative
basis for confidence in these atlases has been established by comparison
between central wavelengths of 1446 FeI lines in the solar
spectrum and at rest, performed by Allende Prieto & García López
(1998). Briefly, they found:
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