accelsearch frequency range

[tanumanghosh]

Hi,

I am running accelsearch within a frequency range of 0.01 to 6.8 Hz by restricting -flo and -fhi. However, it is searching between 0.0 to 6.8 Hz! I am using -numharm 1, so it should search within the specified range only, right? However, the range of Fourier frequency bins is showing correctly, I guess. Is it just a printing issue?

[scottransom]

It might be at least partially a printing issue, but you need to be careful about using -flo and -fhi with harmonic summing as described in the FAQ here:
https://github.com/scottransom/presto/blob/master/FAQ.md#ive-restricted-the-frequency-range-of-my-search-using--flo-fhi-or--rlo-rhi-but-accelsearch-is-still-returning-candidates-outside-of-that-range-why-is-that

[tanumanghosh]

Just to be sure, if I use -numharm 1, it is a single harmonic search. In this case, the frequency range should be strictly between -flo and -fhi. Am I understanding it correctly?

[scottransom]

Correct. But that is certainly not the best way to search for radio pulsars!

[tanumanghosh]

I am working with X-ray pulsars. I am searching with different -numharm values. I just wanted to make sure that the range which is printed for "f" in accelsearch is a typo or not! Thank you.