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4 papers
Spectral Energy Distributions and Multiwavelength Selection of Type 1 Quasars
Gordon T. Richards, Mark Lacy, Lisa J. Storrie-Lombardi +14
We present an analysis of the mid-infrared (MIR) and optical properties of type 1 (broad-line) quasars detected by the Spitzer Space Telescope. The MIR color-redshift relation is c…
What ignites optical jets?
S. Jester
The properties of radio galaxies and quasars with and without optical or X-ray jets are compared. The majority of jets from which high-frequency emission has been detected so far (…
X-rays from the jet in 3C 273: clues from the radio-optical spectra
S. Jester, H. -J. Roeser, K. Meisenheimer +1
Using new deep VLA and HST observations of the large-scale jet in 3C273 matched to 0.3" resolution, we have detected excess near-ultraviolet emission (300 nm) above a synchrotron c…
HST optical spectral index map of the jet of 3C 273
S. Jester, H. -J. Roeser, K. Meisenheimer +2
We present HST images at 622 nm and 300 nm of the jet in 3C273 and determine the run of the optical spectral index at 0.2" along the jet. The smoothness of spectral index changes s…