Figure 11 from THE 31 DEG2 RELEASE OF THE STRIPE 82 X-RAY SURVEY: THE POINT SOURCE CATALOG

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THE 31 DEG² RELEASE OF THE STRIPE 82 X-RAY SURVEY: THE POINT SOURCE CATALOG

Authors: Stephanie M. LaMassa, C. Megan Urry, Nico Cappelluti, Hans Böhringer, Andrea Comastri, Eilat Glikman, Gordon Richards, Tonima Ananna, Marcella Brusa, Carie Cardamone, Gayoung Chon, Francesca Civano, Duncan Farrah, Marat Gilfanov, Paul Green, S. Komossa, Paulina Lira, Martin Makler, Stefano Marchesi, Robert Pecoraro, Piero Ranalli, Mara Salvato, Kevin Schawinski, Daniel Stern, Ezequiel Treister, and Marco Viero

2016 The Astrophysical Journal 817 172.

Provider: AAS Journals

Caption: Figure 11.

SDSS r-band magnitude as a function of observed X-ray flux in the 0.5–2 keV band. The solid line defines the typical X-ray-to-optical flux ratio of AGNs (Brandt & Hasinger 2005), while the dashed lines show the X/O = ±1 locus within which most AGNs lie (see Equation (3)). Stars are identified by their optical spectra while AGNs and galaxies are classified based on their observed 0.5–10 keV luminosity, with 10⁴² erg s⁻¹ being the dividing line.

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