Solar Spectrum Atlases

Bill Livingston

Lloyd Wallace (KPNO) and colleagues have prepared a series of atlases from FTS archives. These are available in soft-cover form for libraries and in digital form.

NSO Report No. Cover Color ftp file Wave Number (cm-1) Wavelength (µm) Source 91001 yellow photatl 850 to 9000 5.4 to 1.1 center disk 93001 pink niratl 8900 to 13600 1.123 to 0.735 center disk 98001 green visatl 3500 to 28000 0.740 to 0.357 center disk 94001 pale-blue spot2atl 460 to 630 22.0 to 16.0 center disk 470 to 1233 21.0 to 8.1 umbra 92001 orange spot1atl 1970 to 8460 5.1 to 1.16 center disk 98002 dark blue spot3atl 8900 to 15050 1.12 to 0.66 center disk 00-001 buff spot4atl 15000 to 23000 0.666 to 0.435 center disk

The digital atlases are available in an FTP archive, which was prepared by Frank Hill. ftp argo.tuc.noao.edu (anonymous) (email address) cd pub/atlas cd <atlas> get README mget <files> bye

The README file in the archive explains the details of the data format (which varies from atlas to atlas). In general, there is a wave number vs intensity listing and, recently, postscript files for direct plotting. Usually there are four data columns: wave number, solar component, atmospheric component, and the 1 airmass raw spectrum. Solar identifications are given in the bound atlases, which may be obtained from either wlivingston@noao.edu, fhill@noao.edu, or lwallace@noao.edu. Since many copies have already been distributed, check your library (e.g., Wallace, L. et al., 1996, ApJ Supp 106, 165).