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Paper: Redshift Dependence of QSO Spectral Variability
Volume: 360, AGN Variability from X-Rays to Radio Waves
Page: 33
Authors: Vagnetti, F.; Trevese, D.
Abstract: We present a combined analysis of the optical spectral variability for two samples of QSOs, 42 objects at z < 0.4 monitored at the Wise Observatory, plus 59 objects up to z ≈ 3 in the field of the Magellanic Clouds, detected and/or monitored within the MACHO Project database. Our analysis shows some increase of the observed spectral variability as a function of redshift, with a large scatter. These data are compared with a model based on the addition of flares of different temperatures to a stationary quasar SED, also taking into account the intrinsic scatter of the SEDs.
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