The NuSTAR Serendipitous Survey: Hunting for the Most Extreme Obscured AGN at >10 keV
The NuSTAR Serendipitous Survey: Hunting for the Most Extreme Obscured AGN at >10 keV
We identify sources with extremely hard X-ray spectra (i.e., with photon indices of Gamma<0.6 in the 13 sq. deg. NuSTAR serendipitous survey, to search for the most highly obscured AGNs detected at >10 keV. Eight extreme NuSTAR sources are identified, and we use the NuSTAR data in combination with lower …