Radio spectrum of the radio source J1332–3146a, obtained using the data in Table 5 (left panel). Filled dots are from G05, open squares are from the present paper. The fit does not include the 306 MHz measurement (see Sect. 4.3). In-band MeerKAT spectral image at the resolution of 15″ × 15″ (right panel). The radio contours are from the full resolution image, i.e. 7.3″ × 7.2″, and are drawn at ±20, 40, 80, and 160 μJy beam⁻¹. A zoom of the radio source associated with SOS 61086 is shown in the inset.