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We present the most energetic BALQSO outflow measured to date, with a kineticluminosity of at least 10^46 ergs/s, which is 5% of the bolometric luminosityof this high Eddington ratio quasar. The associated mass flow rate is 400 solarmasses per year. Such kinetic luminosity and mass flow rate should providestrong AGN feedback effects. The outflow is located at about 300 pc from thequasar and has a velocity of roughly 8000 km/s. Our distance and energeticmeasurements are based in large part on the identification and measurement ofSIV and SIV* BALs. The use of this high ionization species allows us togeneralize the result to the majority of high ionization BALQSOs that areidentified by their CIV absorption. We also report the energetics of two otheroutflows seen in another object using the same technique. The distances of all3 outflows from the central source (100-2000pc) suggest that we observe BALtroughs much farther away from the central source than the assumed accelerationregion of these outflows (0.01-0.1pc).

Major contributor to AGN feedback: VLT X-shooter observations of SIV BAL QSO outflows