Image of CIZA J2242.8+5301 at 45 MHz, shown at the LBA nominal resolution (15″ beam). The contour levels are $[-3,2,3,6,12,24,48,96]\times {\sigma }_{\mathrm{rms}}^{45}$, where ${\sigma }_{\mathrm{rms}}^{45}=1.5\mathrm{mJy}/\mathrm{beam}$, with additional dashed 3σ_rms level from 45″ image (Fig. 3, right). Insets show zoomed-in views at different frequencies (1.4 GHz, Di Gennaro et al. 2018 and 145 MHz, Hoang et al. 2017) and comparable resolutions (6″ and 7.5″, respectively) of the main substructures of the galaxy cluster. Contour levels in all panels are drawn at [ − 3, 2, 3, 6, 12, 24, 48, 96]×σ_rms, with ${\sigma }_{\mathrm{rms}}^{1.4}=3.05\mathrm{\mu }\mathrm{Jy}/\mathrm{beam}$ and ${\sigma }_{\mathrm{rms}}^{145}=0.11\mathrm{mJy}/\mathrm{beam}$. The scale bar at the bottom right of each sub-plot corresponds to 150 kpc. Source labels are adapted from previous studies (e.g. Stroe et al. 2013; Hoang et al. 2017; Di Gennaro et al. 2018).