Near- and mid-IR CC diagrams for the known YSO candidates and the newly identified co-moving sources. Symbols are the same as presented in Fig. 7. (a) (J − H) vs. (H − K_S) CC diagram of the sources. The solid curves in green and magenta represent the loci of the un-reddened main sequence stars and the giants (Maheswar et al. 2010), respectively. The ellipse represents the range of variability of PV Cep, based on the time series observations by Lorenzetti et al. (2011). (b) WISE CC diagram of the sources. The dashed lines separate the regions occupied by the Class I and Class II sources (Koenig & Leisawitz 2014).