Spectral Variability of QSOs in the Optical Band

Details Spectral Variability of QSOs in the Optical Band Spectral Variability of QSOs in the Optical Band

2000-07-12

arxiv.org/abs/astro-ph/0007161v1

Astronomy and Astrophysics

Astrophysics

3 pages, 2 figures, proc. 4th Italian Meeting on AGN "AGN nel 2000", Trieste, May 15-18, 2000, to be published in Mem. SAIt

Scientific paper

A new analysis of the variability of the spectral slope of PG QSOs has been performed, on the basis of recent literature data in the B and R photometric bands. Preliminary results confirm our previous findings concerning the increase of variability with the rest-frame observing frequency. We also find a correlation of the spectral slope with luminosity, consistent with temperature changes of an emitting black body.

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