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Thanks for the alert and spectra, Terry. Plus, your interpretations are very informative. I'm curious about a couple of things. In the AAVSO eclipse plot, starting about 04/20 the 'V Prevalidated' brightness seems to be a consistent ~0.2 mags fainter than the 'Visual Prevalidated'. Is that a real difference or a property of the technical definitions of 'V' and 'Visual'. Spectrally, is there a bandwidth distinction between the two?
Second, could you recommend a source for interpreting bands by star type, atomic mass, and isotope? You mentioned the broad TiO band in the M star. If I were to see the spectra without your interpretation I wouldn't offhand know which band is the TiO and what constitutes broad or narrow absorption. It would be handy to see a spectrum and have a resource by which could identify a particular abs or emiss feature. This comes up a lot as I read the literature and become curious about a band that isn't discussed in the text.
Thanks, Dana in SA
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