BP/RP spectra of the newly detected very-likely RSGs, shown with a black curve. The red-dashed curves show the BP/RP spectra of stars from Messineo & Brown (2019) used as references. The reference spectra have been brought to the target extinction using the infrared-derived and the Galactic extinction curve of Cardelli et al. (1989) extended to infrared wavelengths with a power law with index −1.9 (Messineo et al. 2005). Here, again, the vertical orange dotted-dashed lines mark the locations of the main absorption bands seen in M1-M3 RSGs and O-rich stars; the vertical red lines mark the absorption seen in S-type, and the vertical blue lines are those in C-rich stars.