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19962020
most citedThe XMM-Newton Serendipitous Survey. V. The Second XMM-Newton Serendipitous Source Catalogue

489 citations · 3.5k across the 63 of their papers we have counts for

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astro-ph.GA2017★ 5 cited

AGN with discordant optical and X-ray classification are not a physical family: Diverse origin in two AGN

I. Ordovás-Pascual, S. Mateos, F. J. Carrera +7

Approximately 3-17 percent of Active Galactic Nuclei (AGN) without detected rest-frame UV/optical broad emission lines (type-2 AGN) do not show absorption in X-rays. The physical o…