2025ApJ...995..203C

X-ray surveys are one of the most unbiased methods for detecting Compton-thick (CT; N_H ≥ 10²⁴ cm^–2) active galactic nuclei (AGN), which are thought to comprise up to 60% of AGN within z ≲ 1.0. These CT AGN are often difficult to detect with current instruments, but the X-ray data within the JWST-North Ecliptic Pole (NEP) Time Domain Field present a unique opportunity to study faint and obscured AGN. The NEP contains the deepest NuSTAR survey to date, and X. Zhao et al. detected 60 hard X-ray sources from the combined exposure of NuSTAR's Cycle 5 and 6 observations. In this work, we utilize the NuSTAR Cycle 5+6+8+9 data and simultaneous XMM-Newton observations in order to perform the first spectroscopic analysis of the 60 source catalog. We present this analysis and measure the N_H distribution of the sample. We measure an observed CT fraction of $0.1{3}_{-0.04}^{+0.15}$ down to an observed 8-24 keV flux of 6.0 × 10^–14 erg s cm^–2, and we correct our analysis for absorption bias to estimate an underlying CT fraction of $0.3{2}_{-0.08}^{+0.23}$. The derived obscuration distribution and CT fraction are consistent with population synthesis models and previous surveys.