Fig. 1.
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Two examples of RVS spectra of hot stars (https://www.cosmos.esa.int/web/gaia/iow_20141124). Both stars have Paschen hydrogen lines, and the cooler star (left panel) also shows the calcium infrared triplet lines. A spectrum of the cooler star with a much higher S/N is available in the DR3 archive (Gaia DR3 1053778957742409984).
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