Fig. 4 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. 4.

Integrated relative flux change (Δf/f) vs. high‐S/N epoch S/N for all stars on the 53 plates with more than 50 days of time lag between observations. The overlaid lines show 3 times the 68.3% confidence interval of Δf/f for given values of S/N for all stars. Those stars outside these envelopes (plus signs) are assumed to be variable and are not used in recalibration.

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