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Title:
Arecibo Pulsar Survey Using ALFA: Probing Radio Pulsar Intermittency And Transients
Authors:
Deneva, J. S.; Cordes, J. M.; McLaughlin, M. A.; Nice, D. J.; Lorimer, D. R.; Crawford, F.; Bhat, N. D. R.; Camilo, F.; Champion, D. J.; Freire, P. C. C.; Edel, S.; Kondratiev, V. I.; Hessels, J. W. T.; Jenet, F. A.; Kasian, L.; Kaspi, V. M.; Kramer, M.; Lazarus, P.; Ransom, S. M.; Stairs, I. H.; Stappers, B. W.; van Leeuwen, J.; Brazier, A.; Venkataraman, A.; Zollweg, J. A.; Bogdanov, S.
Affiliation:
AA(Astronomy Department, Cornell University, Ithaca, NY 14853, USA ), AB(Astronomy Department, Cornell University, Ithaca, NY 14853, USA ), AC(Department of Physics, West Virginia University, Morgantown, WV 26506, USA ), AD(Physics Department, Bryn Mawr College, Bryn Mawr, PA 19010, USA ), AE(Department of Physics, West Virginia University, Morgantown, WV 26506, USA ), AF(Department of Physics and Astronomy, Franklin and Marshall College, P.O. Box 3003, Lancaster, PA 17604-3003, USA ), AG(Centre for Astrophysics and Supercomputing, Swinburne University of Technology, Hawthorn, Victoria 3122, Australia ), AH(Columbia Astrophysics Laboratory, Columbia University, New York, NY 10027, USA ), AI(ATNF-CSIRO, Epping, NSW 1710, Australia ), AJ(NAIC, Arecibo Observatory, PR 00612, USA ; Department of Physics, West Virginia University, Morgantown, WV 26506, USA ), AK(Department of Physics, West Virginia University, Morgantown, WV 26506, USA ), AL(Department of Physics, West Virginia University, Morgantown, WV 26506, USA ), AM(Netherlands Institute for Radio Astronomy (ASTRON), Postbus 2, 7990 AA Dwingeloo, Netherlands ; Astronomical Institute "Anton Pannekoek," University of Amsterdam, 1098 SJ Amsterdam, Netherlands ), AN(Center for Gravitational Wave Astronomy, University of Texas at Brownsville, TX 78520, USA ), AO(Department of Physics and Astronomy, University of British Columbia, Vancouver, BC V6T 1Z1, Canada ), AP(Department of Physics, McGill University, Montreal, QC H3A 2T8, Canada ), AQ(University of Manchester, Jodrell Bank Centre for Astrophysics, Alan Turing Building, Manchester M13 9PL, UK ; Max-Planck-Institut für Radioastronomie, Auf dem Huegel 69, 53121 Bonn, Germany ), AR(Department of Physics, McGill University, Montreal, QC H3A 2T8, Canada ), AS(NRAO, Charlottesville, VA 22903, USA ), AT(Department of Physics, McGill University, Montreal, QC H3A 2T8, Canada ; NAIC, Arecibo Observatory, PR 00612, USA ; Centre for Astrophysics and Supercomputing, Swinburne University of Technology, Hawthorn, Victoria 3122, Australia ), AU(University of Manchester, Jodrell Bank Centre for Astrophysics, Alan Turing Building, Manchester M13 9PL, UK ), AV(Astronomical Institute "Anton Pannekoek," University of Amsterdam, 1098 SJ Amsterdam, Netherlands ; Center for Gravitational Wave Astronomy, University of Texas at Brownsville, TX 78520, USA ), AW(Astronomy Department, Cornell University, Ithaca, NY 14853, USA ), AX(Netherlands Institute for Radio Astronomy (ASTRON), Postbus 2, 7990 AA Dwingeloo, Netherlands ), AY(Center for Advanced Computing, Cornell University, Ithaca, NY 14853, USA), AZ(Department of Physics, McGill University, Montreal, QC H3A 2T8, Canada )
Publication:
The Astrophysical Journal, Volume 703, Issue 2, pp. 2259-2274 (2009). (ApJ Homepage)
Publication Date:
10/2009
Origin:
IOP
ApJ Keywords:
pulsars: general, pulsars: individual: PSR J1928+15 PSR J0627+16 PSR J1909+06, surveys
DOI:
10.1088/0004-637X/703/2/2259
Bibliographic Code:
2009ApJ...703.2259D

Abstract

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.
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