Fig. 4.
Portion of the spectrum around the N V λ1239,1243 doublet, with velocities relative to the 1239 Å resonant line in the rest frame of M87. A linear estimate of the local background is indicated with the black dotted line, and the overall model is shown with the red solid line. We have also identified and labeled a faint C III λ1247.4 emission line in this spectrum.
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