[Aavso-photometry] B-V vs. V-I

[Tomas L. Gomez]

Take the Landolt catalog and plot B-V vs. V-I:

http://astrosurf.com/~tlgomez/bv-vi.png

For stars with B-V > 1.3, the plot splits into two
branches. Why is this so?.

Thanks,

Tomas L. Gomez (GOT)