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  The implementation of a Fast-Folding pipeline for long-period pulsar searching in the PALFA survey

Parent, E., Kaspi, V. M., Ransom, S. M., Krasteva, M., Patel, C., Scholz, P., et al. (2018). The implementation of a Fast-Folding pipeline for long-period pulsar searching in the PALFA survey. The Astrophysical Journal, 861(1): 44. doi:10.3847/1538-4357/aac5f0.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0001-DAC7-9 Version Permalink: http://hdl.handle.net/21.11116/0000-0002-F99D-5
Genre: Journal Article

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Parent, E., Author
Kaspi, V. M., Author
Ransom, S. M., Author
Krasteva, M., Author
Patel, C., Author
Scholz, P., Author
Brazier, A., Author
McLaughlin, M. A., Author
Boyce, M., Author
Zhu, W. W., Author
Pleunis, Z., Author
Allen, B.1, Author              
Bogdanov, S., Author
Caballero, K., Author
Camilo, F., Author
Camuccio, R., Author
Chatterjee, S., Author
Cordes, J. M., Author
Crawford, F., Author
Deneva, J. S., Author
Ferdman, R., AuthorFreire, P. C. C., AuthorHessels, J. W. T., AuthorJenet, F. A., AuthorKnispel, B.1, Author              Lazarus, P., Authorvan Leeuwen, J., AuthorLyne, A. G., AuthorLynch, R., AuthorSeymour, A., AuthorSiemens, X., AuthorStairs, I. H., AuthorStovall, K., AuthorSwiggum, J., Author more..
Affiliations:
1Observational Relativity and Cosmology, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society, ou_24011              

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Free keywords: Astrophysics, High Energy Astrophysical Phenomena, astro-ph.HE
 Abstract: The Pulsar Arecibo L-Band Feed Array (PALFA) survey, the most sensitive blind search for radio pulsars yet conducted, is ongoing at the Arecibo Observatory in Puerto Rico. The vast majority of the 180 pulsars discovered by PALFA have spin periods shorter than 2 seconds. Pulsar surveys may miss long-period radio pulsars due to the summing of a finite number of harmonic components in conventional Fourier analyses (typically $\sim$16), or due to the strong effect of red noise at low modulation frequencies. We address this reduction in sensitivity by using a time-domain search technique: the Fast-Folding Algorithm (FFA). We designed a program that implements a FFA-based search in the PALFA processing pipeline, and tested the efficiency of the algorithm by performing tests under both ideal, white noise conditions, as well as with real PALFA observational data. In the two scenarios, we show that the time-domain algorithm has the ability to outperform the FFT-based periodicity search implemented in the survey. We perform simulations to compare the previously reported PALFA sensitivity with that obtained using our new FFA implementation. These simulations show that for a pulsar having a pulse duty cycle of roughly 3%, the performance of our FFA pipeline exceeds that of our FFT pipeline for pulses with DM $\lesssim$ 40 pc cm$^{-3}$ and for periods as short as $\sim$500 ms, and that the survey sensitivity is improved by at least a factor of two for periods $\gtrsim$ 6 sec. Discoveries from the implementation of the algorithm in PALFA are also presented in this paper.

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 Dates: 2018-05-212018
 Publication Status: Published in print
 Pages: Accepted for publication in The Astrophysical Journal; 19 pages, 9 figures, 2 tables
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 Rev. Method: -
 Identifiers: arXiv: 1805.08247
DOI: 10.3847/1538-4357/aac5f0
URI: http://arxiv.org/abs/1805.08247
 Degree: -

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Title: The Astrophysical Journal
Source Genre: Journal
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Pages: - Volume / Issue: 861 (1) Sequence Number: 44 Start / End Page: - Identifier: -