Below are shown all the observed spectra of candidate quasars from SDSS and UKIDSS photometry with the revised color criteria given on the main page.
One of the HAQ quasars showed particularly interesting features in the ALFOSC spectrum (strong intervening HI absorption and high reddening) and was studied in more detail to characterize the absorption system in detail. More detail is available on the dedicated page of this absorber, HAQ 2225+0527.The spectrum from the NOT is shown in black and the photometry from SDSS and UKIDSS is shown as red squares. If the target was observed with the Grism #6 of ALFOSC then the name is marked under the target name. The overplotted lines indicate an unreddened (blue) and reddened (red) combined composite QSO template from Vanden Berk et al. (2001) and Glikman et al. (2006). In each figure the inferred redshift is indicated along the with amount of extinction quantified by A(V) assuming SMC-type dust. In cases where dust is detected in an intervening absorption system along the line of sight, we give the reddening inferred from the absorber A(V)abs (assuming LMC-type dust) at the redshift zabs along with the reddening inferred in the quasar host itself A(V)QSO. If no reddening is applied the template is shown only in blue. The right panel shows the spectral energy distribution compiled from SDSS, UKIDSS, and WISE. Upper limits are showns as red triangles. We plot a continuum template from Richards et al. (2006) with the same colour coding as for the spectral template. Furthermore, next to the spectrum we give a link to the SDSS skyserver providing an overview of data available for the given target.
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Created by Jens-Kristian Krogager
Dark Cosmology Centre, Copenhagen University
&
ESO, Santiago, Chile
September 25, 2014