is excellent and zero point corrections were not required. The final photometry catalogs from the IRAC and MIPS 24 $\mu$m mosaics were then combined into a mid-IR catalog with 37267 sources, which we later merged with the near-IR catalog from our CAHA dataset to form a master source catalog.

Other datasets \[s:observations:ss:other\]
------------------------------------------

In this study we also make use of other datasets available in literature and public, web-based archives:

1.  From the Chandra Source Catalog [CSC; @Evans:2010aa] the positions and X-ray photometry of a total of 611 sources in a box of 30$^\prime$ around the center of IC 1795[^7].

2.  The $^{12}$CO(2-1) and $^{13}$CO(2-1) maps of the W3 region from the study of [@Bieging:2011kq].

3.  The 2.5-level (science grade) SPIRE and PACS mosaics of the W3 region from the Herschel Space Telescope data archive.

4.  The Bolocam 1.1 mm mosaic of W3 from the the Canadian Galactic Plane Survey [GPS; @Aguirre:2011aa].

Data Analysis and Results \[s:analysis\]
========================================

Identification of Young Stellar Sources \[s:analysis:ss:ysoid\]
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Using our master infrared photometry catalog we identified Young Stellar Objects (YSOs) in the W3 complex. First, we identified Class I/0 and Class II sources from IRAC colors using the criteria applied by [@Ybarra:2013kh], which 