87 citations · 171 across the 10 of their papers we have counts for
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Xing-Xing Huang, Jun-Xian Wang, Ying Tan +2
X-ray unabsorbed Seyfert 2 galaxies appear to have X-ray absorption column densities that are too low (NH < 10^22 cm-2) to explain the absence of broad emission lines in their opti…