Extended Data Fig. 5: The PRS spectrum.
From: A nebular origin for the persistent radio emission of fast radio bursts
a, Radio spectra of the three PRSs known so far. b, Radio spectra of the PRS, the nuclear region of the host galaxy and the total emission of the host galaxy. In both panels, power-law fits are reported as solid lines, the green dashed lines indicate the maximum and minimum slope consistent with measurements within errors for the PRS presented in this work, the yellow triangles represent the NOEMA upper limits for FRB 20201124A and the blue shaded area represents the region not detectable by the VLA, in the range 1–50 GHz (we assume a representative r.m.s. = 1 μJy beam−1, reachable in about 10 h at 6 GHz).
