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Weak metal lines in optical high-resolution Very Large Telescope and Keck spectra of “cool” PG 1159 stars | Astronomy & Astrophysics (A&A)
Extremely achromatic f/1.0 all-spherical camera constructed for the high- resolution echelle spectrometer of the Keck telescope
![Weak metal lines in optical high-resolution Very Large Telescope and Keck spectra of “cool” PG 1159 stars | Astronomy & Astrophysics (A&A) Weak metal lines in optical high-resolution Very Large Telescope and Keck spectra of “cool” PG 1159 stars | Astronomy & Astrophysics (A&A)](https://www.aanda.org/articles/aa/full_html/2014/09/aa24051-14/aa24051-14-fig2.jpg)
Weak metal lines in optical high-resolution Very Large Telescope and Keck spectra of “cool” PG 1159 stars | Astronomy & Astrophysics (A&A)
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The nature of Europa's dark non-ice surface material: Spatially-resolved high spectral resolution spectroscopy from the Keck telescope - ScienceDirect
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