Left panels: VISTA/Spitzer CM and CC diagrams for L1630 N. The dot-dashed lines show fuzzy limits with exponential cutoffs that define the YSO candidate selection criterion in the each diagram, excluding contamination from galaxy (diamonds) and field stars presenting normal photospheric colors (circles). The continuous lines show hard limits, objects fainter than which are excluded from the YSO category. Point-like and extended YSO candidates are indicated by dots and squares, respectively; YSO candidates with no VISTA morphological classification are indicated by asterisks. Right panels: 2MASS/Spitzer CM and CC diagrams for the SWIRE catalog (Sect. 3.1). Three objects from the SWIRE catalog (marked as astericks) are classified as YSO candidates, according to our selection criteria.
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