Optical spectroscopic atlas of low-redshift AGN (Marziani+, 2003)

Details Optical spectroscopic atlas of low-redshift AGN (Marziani+, 2003) Optical spectroscopic atlas of low-redshift AGN (Marziani+, 2003)

Mar 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003ycat..21450199m&link_type=abstract

VizieR On-line Data Catalog: J/ApJS/145/199. Originally published in: 2003ApJS..145..199M

Computer Science

Active Gal. Nuclei, Qsos, Atlases, Spectroscopy, Equivalent Widths

Scientific paper

We present a spectral atlas of the H{beta} region for 215 type 1 AGNs (luminous Seyfert 1/radio galaxy nuclei and low-z quasars) up to z~0.8. Line profiles and measures were derived from the database of intermediate resolution spectra (R>~1000) with average continuum level S/N ratio ~30. Parameters including rest frame equivalent width and FWHM are provided for the FeIIopt blend at {lambda}4570, H{beta}, HeII {lambda}4686, and the [OIII] {lambda}{lambda}4959, 5007 emission lines. We extract clean broad component H{beta} profiles and provide wavelength measurements at 0, 1/4, 1/2, 3/4, and 0.9 peak intensity levels in order to permit a quantitative definition of the H{beta} broad component for statistical studies. We also discuss sources of uncertainty, selection effects, and biases in our sample. The data are especially important for tests of the eigenvector 1 parameter space occupation and correlation. We show that the I Zw 1 template FeIIopt spectrum reproduces well the observed FeIIopt emission for a wide range of line width and strength. A detailed analysis of the data within the eigenvector 1 context is deferred to a companion paper.
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