Fig. 13 from Spectral Variability of Quasars in the Sloan Digital Sky Survey. I. Wavelength Dependence

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Spectral Variability of Quasars in the Sloan Digital Sky Survey. I. Wavelength Dependence

Authors: Brian C. Wilhite, Daniel E. Vanden Berk, Richard G. Kron, Donald P. Schneider, Nicholas Pereyra, Robert J. Brunner, Gordon T. Richards, and Jonathan V. Brinkmann

Wilhite et al. 2005 The Astrophysical Journal 633 638.

Provider: AAS Journals

Caption: Fig. 13.

Ratio of the arithmetic mean difference spectrum (top panel of Fig. 10) to the arithmetic mean single‐epoch spectrum (top panel of Fig. 11). Larger values of this ratio indicate a more variable portion of the spectrum. There appears to be a break near 2500 Å, below which the variability increases. The dips at the locations of the emission lines indicate that the lines are considerably less variable than the continuum.

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