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amateur astronomy awk bash be b[e] supergiant c-shell cartoon conference convert csh exoplanet fedora figaro fits fun history iraf jupiter latex linux magellanic clouds massive star matplotlib meteor moon mypaper ondrejov observatory optical paper peblo photometry planet pyraf python scisoft skinakas observatory smc spectroscopy starlink talk theli ubuntu university of crete video x-ray

Fast note on Wien’s law

Just a quick reminder* ! λmax = 2.89776829 x 106 nm K / T [*] Wien’s displacement law

Selected sky lines

A list of sky lines that can be found in spectra (read … handy sky lines!): wavelength (in Å): 5577.3 ( > 5579) 5893 ( > 5890, 5896) 6300.3 6363.8 (1/3 of 6300.3) An excellent and very convenient tool to find and plot the sky lines from 3140 – 10430 can be found at vizier, […]

Selected optical spectral lines

A small (but growing) list of selected (read handy!) optical lines: element wavelength(Å) [NeV] 3346 [NeV] 3426 [OII] 3727 [NeIII] 3869 [NeIII] 3967 Hε 3970 [SII] 4072 Hδ 4101 Ca I 4226 Hγ 4340 [OIII] 4363 HeI 4471 HeII 4686 Hβ 4861 [OIII] 4959 [OIII] 5007 [NI] 5199 [FeVII] 5721 [NII] 5755 HeI 5876 [FeVII] […]