period results for test signal (cos(0.6x) + noise):
nout,jmax,prob=180 38  3.65283e-05
33     0.523599     0.260915
34     0.539465     0.121429
35     0.555332     2.016266
36     0.571199     7.206178
37     0.587065    13.069684
38     0.602932    14.717233
39     0.618799    10.877189
40     0.634665     4.613146
41     0.650532     0.869293
42     0.666399     0.962118
43     0.682265     2.122024