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We present the joint NuSTAR and XMM-Newton spectral analysis in the 0.6-70keV band of three candidate Compton thick (CT-) AGN selected in the 100-monthSwift-BAT catalog. These objects were previously classified as CT-AGNs based onlow quality Swift-XRT and Swift-BAT data, and had soft photon indices(Gamma>2.2) that suggested a potential overestimation of the line of sightcolumn density. Thanks to the high-quality NuSTAR and XMM-Newton data we wereable to determine that in all three objects the photon index was significantlyoverestimated, and two out of three sources are reclassified from CT to Comptonthin, confirming a previously observed trend, i.e., that a significant fractionof BAT-selected, candidate CT-AGNs with poor soft X-ray data are reclassifiedas Compton thin when the NuSTAR data are added to the fit. Finally, thanks toboth the good XMM-Newton spatial resolution and the high NuSTAR and XMM-Newtonspectral quality, we found that the third object in our sample was associatedto the wrong counterpart: the correct one, 2MASX J10331570+5252182, hasredshift z=0.14036, which makes it one of the very few candidate CT-AGNs in the100-month BAT catalog detected at z>0.1, and a rare CT quasar.

astrophysical journal/the astrophysical journal

Compton-thick AGNs in the NuSTAR era. V: Joint NuSTAR and XMM-Newton  spectral analysis of three "soft-Gamma" candidate CT-AGNs in the Swift-BAT  100-month catalog