Spectral atlas
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In astronomy, a spectral atlas is a collection of spectra of one or more objects, intended as a reference work for comparison with spectra of other objects. Several different types of collections are titled spectral atlases: those intended for spectral classification, for key reference, or as a collection of spectra of a general type of object.
In any spectral atlas, generally all the spectra have been taken with the same equipment, or with very similar instruments at different locations, to provide data as uniform as possible in its spectral resolution, wavelength coverage, noise characteristics, etc.