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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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