Fig. 12.
Left panel: [OIII]/Hβ vs. [NII]/Hα diagnostic diagram for the Bullet’s sources. The Kewley et al. (2001) extreme starburst line and the Kauffmann et al. (2003) classification line are shown as red solid and blue dashed lines, respectively. The green open dots denote the X-ray sources at the Bullet redshift classified as AGN according to their 2–10 keV luminosity. Right panel: [OIII]/Hβ vs. [SII]/Hα diagnostic diagram. Symbols are represented as in left panel.
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