Long-term monitoring of NGC 5548
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The narrow [OIII]{lambda}{lambda}4959,5007 emission-line fluxes in the spectrum of the well-studied Seyfert 1 galaxy NGC 5548 are shown to vary with time. From this we show that...
对被广泛研究的赛弗特1型星系NGC 5548的光谱分析显示,其窄带[O III]([OIII])的两条发射线λ4959与λ5007的通量随时间发生变化。基于此,我们证明了……



