Fig. 10 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. 10.

Top: Composite difference spectra for the 315 objects in the final variable quasar sample. The composites are created by taking the arithmetic (black line) or geometric (gray line) mean of the scaled flux differences. Both spectra are boxcar smoothed with a smoothing length of 20 pixels. Bottom: Number of quasars used to create composites as a function of wavelength.

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