http://arxiv.org/abs/1503.06985
We identified three samples of ROSAT sources with Sloan Digital Sky Survey spectra, one at redshift z = 0.1, a second one at z = 0.2 and a third one at z = 0.3. 812 sources in total were examined. We determined the nature and spectral sub-types of the sources by visual inspection. The fraction of each sub-type at each of the three redshifts are then calculated. We consider selection biases caused by the luminosity cut-off threshold to determine whether any systematic trends in AGN type are evident with increasing redshift. We hence probe if an evolution effect is detected in our sample.
H. Winkler and J. Tsuen
Wed, 25 Mar 15
37/38
Comments: 4 pages, 1 figure, South African Institute of Physics 2014 annual conference, in press
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