Wright, Nicholas J.Nicholas J.WrightDrake, Jeremy J.Jeremy J.DrakeGUARCELLO, Mario GiuseppeMario GiuseppeGUARCELLOAldcroft, Tom L.Tom L.AldcroftKashyap, Vinay L.Vinay L.KashyapDAMIANI, FrancescoFrancescoDAMIANIDePasquale, JoeJoeDePasqualeFruscione, AntonellaAntonellaFruscione2025-02-062025-02-0620230067-0049http://hdl.handle.net/20.500.12386/35827The Cygnus OB2 association is the largest concentration of young and massive stars within 2 kpc of the Sun, including an estimated ∼65 O-type stars and hundreds of OB stars. The Chandra Cygnus OB2 Legacy Survey is a large imaging program undertaken with the Advanced CCD Imaging Spectrometer on board the Chandra X-ray Observatory. The survey has imaged the central 0.5 deg2 of the Cyg OB2 association with an effective exposure of ∼120 ks and an outer 0.35 deg2 area with an exposure of ∼60 ks. Here we describe the survey design and observations, discuss the data reduction and source detection, and present a catalog of ∼8000 X-ray point sources. The survey design employs a grid of 36 heavily (∼50%) overlapping pointings, a method that overcomes Chandra's low off-axis sensitivity and produces a highly uniform exposure over the inner 0.5 deg2. The full X-ray catalog is described here and is made available online.STAMPAenArticle10.3847/1538-4365/acdd622-s2.0-85176422107001087307700001https://api.elsevier.com/content/abstract/scopus_id/85176422107https://iopscience.iop.org/article/10.3847/1538-4365/acdd62FIS/05 - ASTRONOMIA E ASTROFISICAERC sectors::Physical Sciences and Engineering