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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
earth and planetary sciences
Arecibo pulsar survey using ALPHA: Probing radio pulsar intermittency and transients
Astrophysical Journal, Volume 703, No. 2, Year 2009
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Description
We present radio transient search algorithms, results, and statistics from the ongoing Arecibo Pulsar ALFA (PALFA) survey of the Galactic plane. We have discovered seven objects through a search for isolated dispersed pulses. All of these objects are Galactic and have measured periods between 0.4 and 4.7 s. One of the new discoveries has a duty cycle of 0.01%, smaller than that of any other radio pulsar. We discuss the impact of selection effects on the detectability and classification of intermittent sources, and compare the efficiencies of periodicity and single-pulse (SP) searches for various pulsar classes. For some cases we find that the apparent intermittency is likely to be caused by off-axis detection or a short time window that selects only a few bright pulses and favors detection with our SP algorithm. In other cases, the intermittency appears to be intrinsic to the source. No transients were found with DMs large enough to require that they originate from sources outside our Galaxy. Accounting for the on-axis gain of the ALFA system, as well as the low gain but large solid-angle coverage of far-out sidelobes, we use the results of the survey so far to place limits on the amplitudes and event rates of transients of arbitrary origin. © 2009. The American Astronomical Society. All rights reserved..
Authors & Co-Authors
Deneva, Julia S.
United States, Ithaca
Cornell University
Cordes, James M.
United States, Ithaca
Cornell University
McLaughlin, Maura Ann
United States, Morgantown
West Virginia University
Nice, David J.
United States, Bryn Mawr
Bryn Mawr College
Lorimer, Duncan R.
United States, Morgantown
West Virginia University
Crawford, Fronefield M.
United States, Lancaster
Franklin and Marshall College, Lancaster
Bhat, N. D. R.
Australia, Hawthorn
Swinburne University of Technology
Camilo, Fernando
United States, New York
Columbia University
Champion, David J.
Australia, Canberra
Commonwealth Scientific and Industrial Research Organisation
Freire, Paulo C.C.
United States, Morgantown
West Virginia University
Kondratiev, Vladislav I.
United States, Morgantown
West Virginia University
Hessels, Jason W.T.
Netherlands, Dwingeloo
Netherlands Foundation for Research in Astronomy
Netherlands, Amsterdam
Universiteit Van Amsterdam
Jenet, Frederick A.
United States, Brownsville
University of Texas at Brownsville and Texas Southmost College
Kaspi, Victoria M.
Canada, Montreal
Université Mcgill
Kramer, Michael
United Kingdom, Manchester
The University of Manchester
Germany, Bonn
Max Planck Institute for Radio Astronomy
Lazarus, Patrick
Canada, Montreal
Université Mcgill
Ransom, Scott M.
United States, Charlottesville
National Radio Astronomy Observatory
Stairs, Ingrid H.
Australia, Hawthorn
Swinburne University of Technology
Canada, Montreal
Université Mcgill
Stappers, Benjamin W.
United Kingdom, Manchester
The University of Manchester
van Leeuwen, Joeri
Netherlands, Amsterdam
Universiteit Van Amsterdam
United States, Brownsville
University of Texas at Brownsville and Texas Southmost College
Brazier, Adam
United States, Ithaca
Cornell University
Venkataraman, Arun
Netherlands, Dwingeloo
Netherlands Foundation for Research in Astronomy
Bogdanov, Slavko
Canada, Montreal
Université Mcgill
Statistics
Citations: 106
Authors: 23
Affiliations: 15
Identifiers
Doi:
10.1088/0004-637X/703/2/2259
ISSN:
0004637X
Research Areas
Health System And Policy
Study Design
Cross Sectional Study
Study Approach
Quantitative