CBA Center for Backyard Astrophysics



Figure 2.

Figure 2

Power spectra in 1992 - 1994, with significant peaks marked with their periods in seconds. A 1011 s signal, markedly absent in 1997, dominates the low-frequency regime in 1993 and 1994. The 1992 data is highly aliased, but one of the acceptable aliases occurs at 1028.7 s, the period seen strongly in 1997.

( return to article )