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  Arecibo Pulsar Survey Using ALFA. IV. Mock Spectrometer Data Analysis, Survey Sensitivity, and the Discovery of 40 Pulsars

Lazarus, P., Brazier, A., Hessels, J. W. T., Karako-Argaman, C., Kaspi, V. M., Lynch, R., et al. (2015). Arecibo Pulsar Survey Using ALFA. IV. Mock Spectrometer Data Analysis, Survey Sensitivity, and the Discovery of 40 Pulsars. Astrophysical Journal, 812(1): 81. doi:10.1088/0004-637X/812/1/81.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0029-5BC8-4 Version Permalink: http://hdl.handle.net/21.11116/0000-0002-9990-E
Genre: Journal Article

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 Creators:
Lazarus, P., Author
Brazier, A., Author
Hessels, J. W. T., Author
Karako-Argaman, C., Author
Kaspi, V. M., Author
Lynch, R., Author
Madsen, E., Author
Patel, C., Author
Ransom, S. M., Author
Scholz, P., Author
Swiggum, J., Author
Zhu, W. W., Author
Allen, B.1, Author              
Bogdanov, S., Author
Camilo, F., Author
Cardoso, F., Author
Chatterjee, S., Author
Cordes, J. M., Author
Crawford, F., Author
Deneva, J. S., Author
Ferdman, R., AuthorFreire, P. C. C., AuthorJenet, F. A., AuthorKnispel, B.1, Author              Lee, K. J., Authorvan Leeuwen, J., AuthorLorimer, D. R., AuthorLyne, A. G., AuthorMcLaughlin, M. A., AuthorSiemens, X., AuthorSpitler, L. G., AuthorStairs, I. H., AuthorStovall, K., AuthorVenkataraman, A., 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 on-going PALFA survey at the Arecibo Observatory began in 2004 and is searching for radio pulsars in the Galactic plane at 1.4 GHz. Observations since 2009 have been made with new wider-bandwidth spectrometers than were previously employed in this survey. A new data reduction pipeline has been in place since mid-2011 which consists of standard methods using dedispersion, searches for accelerated periodic sources, and search for single pulses, as well as new interference-excision strategies and candidate selection heuristics. This pipeline has been used to discover 41 pulsars, including 8 millisecond pulsars (MSPs; P < 10 ms), bringing the PALFA survey's discovery totals to 145 pulsars, including 17 MSPs, and one Fast Radio Burst (FRB). The pipeline presented here has also re-detected 188 previously known pulsars including 60 found in PALFA data by re-analyzing observations previously searched by other pipelines. A comprehensive description of the survey sensitivity, including the effect of interference and red noise, has been determined using synthetic pulsar signals with various parameters and amplitudes injected into real survey observations and subsequently recovered with the data reduction pipeline. We have confirmed that the PALFA survey achieves the sensitivity to MSPs predicted by theoretical models. However, we also find that compared to theoretical survey sensitivity models commonly used there is a degradation in sensitivity to pulsars with periods P >= 100 ms that gradually becomes up to a factor of ~10 worse for P > 4 s at DM < 150 pc/cc. This degradation of sensitivity at long periods is largely due to red noise. We find that 35 +- 3% of pulsars are missed despite being bright enough to be detected in the absence of red noise. This reduced sensitivity could have implications on estimates of the number of long-period pulsars in the Galaxy.

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 Dates: 2015-04-092015
 Publication Status: Published in print
 Pages: 24 pages, 13 figures, submitted to ApJ
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: arXiv: 1504.02294
DOI: 10.1088/0004-637X/812/1/81
URI: http://arxiv.org/abs/1504.02294
 Degree: -

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Title: Astrophysical Journal
Source Genre: Journal
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Publ. Info: Chicago, IL : University of Chicago Press for the American Astronomical Society
Pages: - Volume / Issue: 812 (1) Sequence Number: 81 Start / End Page: - Identifier: ISSN: 0004-637X
CoNE: /journals/resource/954922828215_2