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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
earth and planetary sciences
ARECIBO PULSAR SURVEY USING ALFA. IV. MOCK SPECTROMETER DATA ANALYSIS, SURVEY SENSITIVITY, and the DISCOVERY of 40 PULSARS
Astrophysical Journal, Volume 812, No. 1, Article 81, Year 2015
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Description
The on-going Arecibo Pulsar-ALFA (PALFA) survey began in 2004 and is searching for radio pulsars in the Galactic plane at 1.4 GHz. Here we present a comprehensive description of one of its main data reduction pipelines that is based on the PRESTO software and includes new interference-excision algorithms and candidate selection heuristics. This pipeline has been used to discover 40 pulsars, bringing the surveys discovery total to 144 pulsars. Of the new discoveries, eight are millisecond pulsars (MSPs; P 10 ms) and one is a Fast Radio Burst (FRB). This pipeline has also re-detected 188 previously known pulsars, 60 of them previously discovered by the other PALFA pipelines. We present a novel method for determining the survey sensitivity that accurately takes into account the effects of interference and red noise: we inject synthetic pulsar signals with various parameters into real survey observations and then attempt to recover them with our pipeline. We find that the PALFA survey achieves the sensitivity to MSPs predicted by theoretical models but suffers a degradation for P ≥ 100 ms that gradually becomes up to ?10 times worse for P < 4 s at DM 50 pc cm?3. We estimate 33 ± 3% of the slower pulsars are missed, largely due to red noise. A population synthesis analysis using the sensitivity limits we measured suggests the PALFA survey should have found 224 ± 16 un-recycled pulsars in the data set analyzed, in agreement with the 241 actually detected. The reduced sensitivity could have implications on estimates of the number of longperiod pulsars in the Galaxy. © 2015. The American Astronomical Society. All rights reserved.
Authors & Co-Authors
Lazarus, Patrick
Germany, Bonn
Max Planck Institute for Radio Astronomy
Brazier, Adam
United States, Ithaca
Cornell University
Hessels, Jason W.T.
Netherlands, Dwingeloo
Netherlands Foundation for Research in Astronomy
Netherlands, Amsterdam
Universiteit Van Amsterdam
Karako-Argaman, Chen
Canada, Montreal
Université Mcgill
Kaspi, Victoria M.
Canada, Montreal
Université Mcgill
Lynch, Ryan S.
Canada, Montreal
Université Mcgill
United States, Morgantown
West Virginia University
Madsen, E. C.
Canada, Montreal
Université Mcgill
Patel, Chitrang
Canada, Montreal
Université Mcgill
Ransom, Scott M.
United States, Charlottesville
National Radio Astronomy Observatory
Scholz, Paul
Canada, Montreal
Université Mcgill
Swiggum, Joseph K.
United States, Morgantown
West Virginia University
Zhu, Weiwei
Germany, Bonn
Max Planck Institute for Radio Astronomy
Allen, Bruce
Germany, Potsdam
Max-planck-institut Für Gravitationsphysik Albert-einstein-institut
Germany, Hannover
Gottfried Wilhelm Leibniz Universität Hannover
United States, Milwaukee
University of Wisconsin-milwaukee
Bogdanov, Slavko
United States, New York
Columbia University
Camilo, Fernando
United States, New York
Columbia University
Cardoso, F.
United States, Morgantown
West Virginia University
Chatterjee, S.
United States, Ithaca
Cornell University
Cordes, James M.
United States, Ithaca
Cornell University
Crawford, Fronefield M.
United States, Lancaster
Franklin and Marshall College, Lancaster
Deneva, Julia S.
United States, Washington, D.c.
National Research Council
Ferdman, Robert D.
Canada, Montreal
Université Mcgill
Freire, Paulo C.C.
Germany, Bonn
Max Planck Institute for Radio Astronomy
Jenet, Frederick A.
United States, Brownsville
University of Texas at Brownsville and Texas Southmost College
Knispel, Benjamin
Germany, Potsdam
Max-planck-institut Für Gravitationsphysik Albert-einstein-institut
Lee, Kejia
China, Beijing
Peking University
Leeuwen, Joeri Van
Netherlands, Dwingeloo
Netherlands Foundation for Research in Astronomy
Netherlands, Amsterdam
Universiteit Van Amsterdam
Lorimer, Duncan R.
United States, Morgantown
West Virginia University
Lyne, Andrew G.
United Kingdom, Manchester
The University of Manchester
McLaughlin, Maura Ann
United States, Morgantown
West Virginia University
Siemens, Xavier
United States, Milwaukee
University of Wisconsin-milwaukee
Spitler, Laura G.
Germany, Bonn
Max Planck Institute for Radio Astronomy
Stairs, Ingrid H.
Canada, Vancouver
The University of British Columbia
Stovall, Kevin
United States, Albuquerque
The University of new Mexico
Venkataraman, Arun
United States, Arecibo
Arecibo Observatory
Statistics
Citations: 75
Authors: 34
Affiliations: 19
Identifiers
Doi:
10.1088/0004-637X/812/1/81
ISSN:
0004637X
Study Design
Cross Sectional Study
Study Approach
Quantitative