frequency parameter space) to be searched can be calculated, and with knowledge of the per-template time taken by the code (obtained from timing tests), the total computing time can be obtained. Limiting the target computing time, in our case to 1000 core-months, then allows us to solve for the coherence time $T_\mathrm{data}$, which we then feed back into Eq. (\[senscurve\]) to begin the process anew until it iteratively converges on a parameter space and accompanying coherence time. The iterative algorithm thus balances the computational gains from resampling between the use of a longer coherence time (giving better sensitivity) and the expansion of the parameter space over which the indirect limit can be beaten (caused by the improved sensitivity). The result for the globular cluster NGC 6544 is a search over the frequency range 92.5 Hz to 675 Hz, with a coherence time of 9.2 days.

The peculiar velocities of globular clusters are negligible, as they represent an essentially constant Doppler shift of order $1 \times 10^{-3}$; so is velocity dispersion, which is an order of magnitude smaller. Since we search down to 300-year timescales, the acceleration of the cluster is also not an issue [@MillionBody].

Implementation
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All searches were 