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Fig. 11.


Left: two giant radio galaxies with likely optical hosts circled. In yellow (13:07:20.83, +46:30:52.67) the host galaxy has a spectroscopic redshift of 0.6038 ± 0.0002. This giant radio galaxy has a physical size of 2.07 ± 0.18 Mpc. In green (13:07:18.07, +46:29:46.61) the host galaxy has a spectroscopic redshift of 0.7416 ± 0.0002. This giant radio galaxy a physical size of 1.27 ± 0.22 Mpc measured from east to west. Right: giant radio galaxy with a potential optical host circled in yellow, identified in SDSS (13:07:54.32, +46:45:11.92) with a photometric redshift of 0.409 ± 0.104. It has a physical size of 1.08 ± 0.36 Mpc. In both images the background is an SDSS composite image from bands g, r, and i. LOFAR and GMRT contours are overlaid at 6″  resolution starting at five times the rms noise (90 μJy beam−1), and increase by a factor of 1.6.

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