A near-infrared spectral template for quasars

@article{Glikman2006ANS,
  title={A near-infrared spectral template for quasars},
  author={Eilat Glikman and David J. Helfand and Richard L. White Columbia Univeristy and Space Telescope Science Institute},
  journal={The Astrophysical Journal},
  year={2006},
  volume={640},
  pages={579-591}
}
We present a near-infrared quasar composite spectrum spanning the wavelength range 0.58-3.5 μm. The spectrum has been constructed from observations of 27 quasars obtained at the NASA IRTF telescope and satisfying the criteria Ks < 14.5 and Mi < -23; the redshift range is 0.118 < z < 0.418. The signal-to-noise ratio is moderate, reaching a maximum of 150 between 1.6 and 1.9 μm. While a power-law fit to the continuum of the composite spectrum requires two breaks, a single power-law slope of… 
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References

SHOWING 1-10 OF 32 REFERENCES
A Composite HST Spectrum of Quasars
We construct a composite quasar spectrum from 284 HST FOS spectra of 101 quasars with redshifts z > 0.33. The spectrum covers the wavelengths between 350 and 3000 A in the rest frame, with a peak S/N
Composite Quasar Spectra from the Sloan Digital Sky Survey
We have created a variety of composite quasar spectra using a homogeneous data set of over 2200 spectra from the Sloan Digital Sky Survey (SDSS). The quasar sample spans a redshift range of 0.044 ≤ z
THE REST-FRAME EXTREME-ULTRAVIOLET SPECTRAL PROPERTIES OF QUASI-STELLAR OBJECTS
We use a sample of 332 Hubble Space Telescope spectra of 184 quasi-stellar objects (QSOs) with z > 0.33 to study the typical ultraviolet spectral properties of QSOs, with emphasis on the ionizing
Near-infrared template spectra of normal galaxies: k-corrections, galaxy models and stellar populations
We have observed 28 local galaxies in the wavelength range between 1 and 2.4 μm in order to define template spectra of the normal galaxies along the Hubble sequence. Five galaxies per morphological
Spitzer Infrared Spectrograph (IRS) Observations of the Redshift 3.91 Quasar APM 08279+5255
The Infrared Spectrograph (IRS) on board the Spitzer Space Telescope has been used to obtain low- and moderate-resolution spectra of the dust- and gas-rich quasar APM 08279+5255 (z = 3.91). Broad Pa?
FIRST-2Mass Sources below the APM Detection Threshold: A Population of Highly Reddened Quasars
We have constructed a sample of bright near-infrared sources that are detected at radio wavelengths but undetected on the first-generation Palomar Observatory Sky Survey (POSSI) plates in order to
A Composite Extreme Ultraviolet QSO Spectrum from the Far Ultraviolet Spectroscopic Explorer
The Far Ultraviolet Spectroscopic Explorer (FUSE) has surveyed a large sample (>100) of active galactic nuclei in the low-redshift universe (z<1). Its response at short wavelengths makes it possible
A Composite Extreme-Ultraviolet QSO Spectrum from FUSE
The Far Ultraviolet Spectroscopic Explorer (FUSE) has surveyed a large sample (>100) of active galactic nuclei (AGNs) in the low-redshift universe (z 0.33 formed from archival Hubble Space Telescope
Atlas of quasar energy distributions
We present an atlas of the spectral energy distributions (SEDs) of normal, nonblazar, quasars over the whole available range (radio to 10 keV X-rays) of the electromagnetic spectrum. The primary
Quasars, their host galaxies and their central black holes
We present the final results from our deep Hubble Space Telescope (HST) imaging study of the host galaxies of radio-quiet quasars (RQQs), radio-loud quasars (RLQs) and radio galaxies (RGs). We
...
1
2
3
4
...