Free Access

Fig. 1


GTC spectra shown together with the photometry from SDSS, UKIDSS, and WISE in the u,g,r,i,z,Y,JH,Ks, and W1 bands (Warren et al. 2007; Wright et al. 2010; Eisenstein et al. 2011). We also overplot a composite quasar spectrum and a reddened composite as described in the text. The shaded area shows the effect of the 2175-Å extinction bump from dust in the z = 2.027 DLA galaxy. In the inset we plot a zoom on the blue part of the spectrum where we show the 2500U spectrum covering the region around the hydrogen Lyα line of the z = 2.027 absorber. Overplotted is the DLA fit assuming a column density of 1021.5±0.3 cm-2; the ±1σ curves are shown with dashed lines.

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.