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Fig. 3


Top panel: the template spectra of SiS, SiO, H2O, and CO. Bottom panel: the spectra of all naked stars from 5 μm to 20 μm, normalized with a blackbody spectrum. The the two panels on the left show the stars without SiS, the right-most panel shows all stars with significant SiS absorption. The sharp feature at 15.3 μm seen in all stars is most likely an artifact of the data reduction process.

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