534 citations · 3.7k across the 54 of their papers we have counts for
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The X-ray Properties of the Most-Luminous Quasars from the Sloan Digital Sky Survey
D. W. Just, W. N. Brandt, O. Shemmer +4
Utilizing 21 new Chandra observations as well as archival Chandra, ROSAT, and XMM-Newton data, we study the X-ray properties of a representative sample of 59 of the most optically…
Dust covering factor, silicate emission and star formation in luminous QSOs
R. Maiolino, O. Shemmer, M. Imanishi +4
We present Spitzer IRS low resolution, mid-IR spectra of a sample of 25 high luminosity QSOs at 2<z<3.5. When combined with archival IRS observations of local, low luminosity type-…
The Realm of the First Quasars in the Universe: the X-ray View
C. Vignali, W. N. Brandt, O. Shemmer +3
We review the X-ray studies of the highest redshift quasars, focusing on the results obtained with Chandra and XMM-Newton. Overall, the X-ray and broad-band properties of z>4 quasa…
PAH emission and star formation in the host of the z~2.56 Cloverleaf QSO
D. Lutz, E. Sturm, L. J. Tacconi +7
We report the first detection of the 6.2micron and 7.7micron infrared `PAH' emission features in the spectrum of a high redshift QSO, from the Spitzer-IRS spectrum of the Cloverlea…