We compared the results from SigSpec and from the iterative-sine-wave fitting, considering an error range of 0.005d-1 in frequency (i.e., a width 3.4 times narrower than 1/DeltaT). The cross-checks show an almost complete agreement on the values of the first 500 frequencies: 498 frequencies were found by both methods, whose 438 (88%) have an amplitude within the 20% range of tolerance. In particular, both methods correctly identified the first 462 frequencies within an interval of few units of 10-4d-1. These frequencies are listed in Table 2. (1 data file).