Figure 4 from THE OPTICAL VARIABILITY OF SDSS QUASARS FROM MULTI-EPOCH SPECTROSCOPY. II. COLOR VARIATION

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THE OPTICAL VARIABILITY OF SDSS QUASARS FROM MULTI-EPOCH SPECTROSCOPY. II. COLOR VARIATION

Authors: Hengxiao Guo (郭恒潇) and Minfeng Gu

2016 The Astrophysical Journal 822 26.

Provider: AAS Journals

Caption: Figure 4.

Histogram of the spectral index of the continuum for our sample. The black solid line is for all epochs, while the blue and red solid lines are for bright and faint epochs, respectively.

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