Abstract
We present accurate measurements of the cen- tral wavelengths of 4947 atomic absorption lines in the so- lar optical spectrum. The wavelengths, precise to a level 50 150 m s 1 , are given for both flux and disc-centre spectra, as measured in relatively recent FTS solar atlases. This catalogue modernizes existing sources based on pho- tographic measurements and provides a benchmark to test and perform wavelength calibrations of astronomical spec- tra. It will also permit observers to improve the absolute wavelength calibration of solar optical spectra when lamps are not available at the telescope.
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