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On-axis spatially resolved spectroscopy of low redshift quasar host galaxies: HE 1503+0228 at z=0.135
F. Courbin, G. Letawe, P. Magain +8
We present the first result of a comprehensive spectroscopic study of quasar host galaxies. On-axis, spatially resolved spectra of low redshift quasars have been obtained with FORS…
HE 0435-1223: a wide separation quadruple QSO and gravitational lens
Lutz Wisotzki, Paul L. Schechter, Hale V. Bradt +2
We report the discovery of a new gravitationally lensed QSO, at a redshift z = 1.689, with four QSO components in a cross-shaped arrangement around a bright galaxy. The maximum sep…
Statistical methods of automatic spectral classification and their application to the Hamburg/ESO Survey
Norbert Christlieb, Lutz Wisotzki, Gerd Grasshoff
We employ classical statistical methods of multivariate classification for the exploitation of the stellar content of the Hamburg/ESO objective prism survey (HES). In a simulation…