Spectrophotometry of Michigan-Tololo quasars

Details Spectrophotometry of Michigan-Tololo quasars Spectrophotometry of Michigan-Tololo quasars

Apr 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979stin...7930121l&link_type=abstract

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Astronomy and Astrophysics

Astronomy

Astronomical Photometry, Cosmology, Emission Spectra, Quasars, Spectrophotometry, Astronomical Observatories, Luminous Intensity, Red Shift, Stellar Spectra

Scientific paper

Emission-line quasar characteristics are confirmed for 80% of the objects observed, including at least four new quasars with spectral features indicative of supernova-like outflow. Approximately 73% of the redshifts predicted from the discovery plates are found accurate with a mean error in z of 0.03, and a large range of z (from about 0.1 to 3.16) is represented in the sample. The observed redshift distribution for quasars is marginally consistent with a constant co-moving quasar density above z approximately 2.0. The shape of the redshift distribution may be used as an isotropy probe with a cosmic time resolution of a few times one-hundred million years in the early universe; therefore, continued surveys of this sort are important even if accurate magnitudes are not determined.

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