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OPTICAL SPECTRAL PROPERTIES OFSWIFTBURST ALERT TELESCOPE HARD X-RAY-SELECTED ACTIVE GALACTIC NUCLEI SOURCES
- Source :
- The Astrophysical Journal. 710:503-539
- Publication Year :
- 2010
- Publisher :
- American Astronomical Society, 2010.
-
Abstract
- The Swift Burst Alert Telescope (BAT) survey of Active Galactic Nuclei (AGN) is providing an unprecedented view of local AGNs ( = 0.03) and their host galaxy properties. In this paper, we present an analysis of the optical spectra of a sample of 64 AGNs from the 9-month survey, detected solely based on their 14-195 keV flux. Our analysis includes both archived spectra from the Sloan Digital Sky Survey and our own observations from the 2.1-m Kitt Peak National Observatory telescope. Among our results, we include line ratio classifications utilizing standard emission line diagnostic plots, [O III] 5007 A luminosities, and H-beta derived black hole masses. As in our X-ray study, we find the type 2 sources to be less luminous (in [O III] 5007 A and 14-195 keV luminosities) with lower accretion rates than the type 1 sources. We find that the optically classified LINERs, H II/composite galaxies, and ambiguous sources have the lowest luminosities, while both broad line and narrow line Seyferts have similar luminosities. From a comparison of the hard X-ray (14-195 keV) and [O III] luminosities, we find that both the observed and extinction-corrected [O III] luminosities are weakly correlated with X-ray luminosity. In a study of the host galaxy properties from both continuum fits and measurements of the stellar absorption indices, we find that the hosts of the narrow line sources have properties consistent with late type galaxies.
- Subjects :
- Physics
Active galactic nucleus
Astrophysics::High Energy Astrophysical Phenomena
media_common.quotation_subject
Doubly ionized oxygen
Astronomy and Astrophysics
Astrophysics::Cosmology and Extragalactic Astrophysics
Astrophysics
Spectral line
Accretion (astrophysics)
Galaxy
law.invention
Telescope
Space and Planetary Science
Sky
law
Astrophysics::Solar and Stellar Astrophysics
Emission spectrum
Astrophysics::Galaxy Astrophysics
media_common
Subjects
Details
- ISSN :
- 15384357 and 0004637X
- Volume :
- 710
- Database :
- OpenAIRE
- Journal :
- The Astrophysical Journal
- Accession number :
- edsair.doi...........dc0f1ec39efc522ec71ca1c56225496d