A New Echo-Mapping Campaign at Intermediate Redshift

Details A New Echo-Mapping Campaign at Intermediate Redshift A New Echo-Mapping Campaign at Intermediate Redshift

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aspc..360..201t&link_type=abstract

AGN Variability from X-Rays to Radio Waves ASP Conference Series, Vol. 360, Proceedings of the conference held 14-16 June, 2004

Astronomy and Astrophysics

Astrophysics

Scientific paper

AGN masses can be estimated by ``single epoch'' spectral measurements through a mass/luminosity/line-width relation calibrated by echo-mapping measurements of a reference sample of low-redshift (z < 0.3) and low-luminosity (M_B > -26 mag) AGNs. To analyze the possible dependence of this relation on luminosity, we selected a sample of bright, intermediate-redshift (z ≈ 1) objects and we started a spectrophotometric monitoring campaign with a typical sampling time of about one month. Variability observations of lines with wavelengths shortward of Hβ will also provide new information on the structure of the broad-line region. Cross-correlation analysis of continuum and line variations will require years of monitoring. We present a preliminary analysis of the data collected during the first year of observations. We discuss the adequacy of the spectrophotometric accuracy attained and future prospects of this project.

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