NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-06-18 T02:10:40 PDT
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For refcode 2003ApJS..145..199M:
Retrieve 215 NED objects in this reference.
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Copyright by American Astronomical Society. Reproduced by permission
2003ApJS..145..199M An Optical Spectroscopic Atlas of Low-Redshift Active Galactic Nuclei P. Marziani, J. W. Sulentic, R. Zamanov, M. Calvani, D. Dultzin-Hacyan, R. Bachev, and T. Zwitter Received 2002 September 26; accepted 2002 November 8 ABSTRACT 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 Fe IIopt blend at {lambda}4570, H{beta}, He II {lambda}4686, and the [O III] {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 Fe IIopt spectrum reproduces well the observed Fe IIopt 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. Subject headings: atlases-galaxies: active-galaxies: nuclei - quasars: emission lines-quasars: general
Retrieve 215 NED objects in this reference.
Please click here for ADS abstract

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