Fig. 1.


Optical counterparts of the three gravitationally lensed quasars with the 144 MHz LoTSS contours overlaid. The contours shown are at the 3σ, 4σ, 5σ, 6σ, and 7σ level, where σ is the off-source rms noise (given in Table 2). For SDSS J1055+4826 and SDSS J1313+5151, we show the SDSS g-band images. For SBS 1520+350, we show the HST V band (F555W filter). For SBS 1520+350, the quasar images are indicated with the red circles, and the primary and secondary lensing galaxies are denoted with the green circles; the unlabelled objects are foreground stars.

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.