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Fig. 3
Month-averaged profiles of the Hα and Hβ broad emission lines in the period between 1987–2004. The abscissa (OX) shows radial velocities with respect to the narrow component of the Hα or Hβ line. The ordinate (OY) shows the flux in units of 10-16 erg cm-2 s-1 Å-1.
This figure is made of several images, please see below:
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