A high signal-to-noise ratio composite quasar spectrum

Astronomy and Astrophysics – Astrophysics

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0



Astronomical Spectroscopy, Emission Spectra, Quasars, Signal To Noise Ratios, Stellar Luminosity, Iron, Line Spectra, Red Shift, Spectral Resolution, Ultraviolet Spectra, Visible Spectrum

Scientific paper

A very high signal-to-noise ratio (S/N of about 400) composite spectrum of the rest-frame ultraviolet and optical region of high luminosity quasars is presented. The spectrum is derived from 718 individual spectra obtained as part of the Large Bright Quasar Survey. The moderate resolution, 4A or less, and high signal-to-noise ratio allow numerous weak emission features to be identified. Of particular note is the large equivalent-width of the Fe II emission in the rest-frame ultraviolet and the blue continuum slope of the composite. The primary aim of this paper is to provide a reference spectrum for use in line identifications, and a series of large-scale representations of the composite spectrum are shown. A measure of the standard deviation of the individual quasar spectra from the composite spectrum is also presented.

No associations


Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.


A high signal-to-noise ratio composite quasar spectrum does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with A high signal-to-noise ratio composite quasar spectrum, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A high signal-to-noise ratio composite quasar spectrum will most certainly appreciate the feedback.

Rate now


Profile ID: LFWR-SCP-O-1279196

All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.