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Fast Calculation of the Lomb-Scargle Periodogram Using Graphics Processing Units

R. H. D. Townsend
Department of Astronomy, University of Wisconsin-Madison, Sterling Hall, 475 N. Charter Street, Madison, WI 53706, USA
arXiv:1007.1658 [astro-ph.SR] (9 Jul 2010)

@article{townsend2010fast,

   title={Fast Calculation of the Lomb-Scargle Periodogram Using Graphics Processing Units},

   author={Townsend, RHD},

   journal={Arxiv preprint arXiv:1007.1658},

   year={2010}

}

I introduce a new code for fast calculation of the Lomb-Scargle periodogram, that leverages the computing power of graphics processing units (GPUs). After establishing a background to the newly emergent field of GPU computing, I discuss the code design and narrate the key parts of the source. Benchmarking calculations indicate no significant differences in accuracy compared to an equivalent CPU-based code; however, the code is up to 200 times faster than the CPU equivalent. Possible applications include spectral analysis of long photometric time series obtained by ongoing satellite missions; and Monte-Carlo simulation of periodogram statistical properties.
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