We present the Swift optical to X-ray spectral energy distributions ( SEDs ) of 44 quasars at redshifts z \approx 2 observed by Swift , part of a larger program to establish and characterize the optical through X-ray SEDs of moderate-redshift quasars .
Here we outline our analysis approach and present preliminary analysis and results for the first third of the full quasar sample .
Not all quasars in the sample are detected in X-rays ; all of the X-ray detected objects so far are radio loud .
As expected for radio loud objects , they are X-ray bright relative to radio-quiet quasars of comparable optical luminosities , with an average \alpha _ { \mathrm { ox } } = 1.39 \pm 0.03 ( where \alpha _ { \mathrm { ox } } is the power-law slope connecting the monochromatic flux at 2500 Å and at 2 keV ) , and display hard X-ray spectra .
We find integrated 3000 Å - 25 keV accretion luminosities of between 0.7 \times 10 ^ { 46 } erg s ^ { -1 } and 5.2 \times 10 ^ { 47 } erg s ^ { -1 } .
Based on single-epoch spectroscopic virial black hole mass estimates , we find that these quasars are accreting at substantial Eddington fractions , 0.1 \apprle L / L _ { \mathrm { Edd } } \apprle 1 .