Profiles of the six pulsars in M13 across different frequencies. X-axis of all the profiles are full rotations. The top four rows are the four 100 MHz wide subbands of UWB 400–800 MHz data and the fifth row is their sum. M13A, M13B, and M13F were detected in low-frequency bands. M13F was discovered in 400–800 MHz, though it is only seen in the 400–500 MHz subband.