supported by the National Natural Science Foundation of China (Grant Nos.10803008, 10833005 and 10573028);the National Basic Research Program of China (Grant Nos.2009CB824800 and 2007CB815402);the Group Innovation Project (Grant No.10821302)
We analyze the optical spectra of Fairall 9,a luminous Seyfert 1 galaxy.They are obtained from the AGN Watch program that has monitored this object for 9 months.The flux and variation of the optical FeII complex is me...