Notes. Each parameter listed here is described in Section 3, except for ϕ₀ which is the rotation phase of J0623 at the start of the MeerKAT observations. The nominal values shown are the 50th percentile, and the lower and upper values are the 16th and 84th percentiles. Values quoted without errors have errors less than the least significant digit. The subscripts 1 and 2 refer to each AFL. At the bottom of the table, we show the Bayesian evidence and maximum likelihood that UltraNest converges on. The co-latitude values listed correspond to emission at the maximum frequency of 1500 MHz (see Appendix C.2), with the difference in co-latutides from 1500 to 950 MHz varying from 1.5 to 2.9 degrees. We also provide the reduced χ² values, which we compute from the data with the average lightcurve over each band. The low and high subscripts refer to the two bands of the MeerKAT data, which are 950 to 1150 MHz and 1300 to 1500 MHz. The posterior distributions for the parameters inferred for the 2 AFL scenario is shown in Figure C.2. We note that some of the parameters listed are degenerate (see Appendix A.3).