Fig. 3
Colour excess versus vLSR for the observed sources. Filled circles denote supergiants, while empty diamonds are for giants. The notation is shorthand for the identificators in Table 1 being C for Core, H for Halo, N for Near and 2 for complementary targets. There is a clear overdensity of RSGs around E(J − KS) = 2.6 and vLSR = 92 km s-1.
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