ARECIBO PULSAR SURVEY USING ALFA: PROBING RADIO PULSAR INTERMITTENCY AND TRANSIENTS

被引：105

作者：

Deneva, J. S. ^{[1
]}

Cordes, J. M. ^{[1
]}

McLaughlin, M. A. ^{[2
]}

Nice, D. J. ^{[3
]}

Lorimer, D. R. ^{[2
]}

Crawford, F. ^{[4
]}

Bhat, N. D. R. ^{[5
]}

Camilo, F. ^{[6
]}

Champion, D. J. ^{[7
]}

Freire, P. C. C. ^{[2
,8
]}

Edel, S. ^{[2
]}

Kondratiev, V. I. ^{[2
]}

Hessels, J. W. T. ^{[9
,10
]}

Jenet, F. A. ^{[11
]}

Kasian, L. ^{[12
]}

Kaspi, V. M. ^{[13
]}

Kramer, M. ^{[14
,15
]}

Lazarus, P. ^{[13
]}

Ransom, S. M. ^{[16
]}

Stairs, I. H. ^{[5
,8
,13
]}

Stappers, B. W. ^{[14
]}

van Leeuwen, J. ^{[10
,11
]}

Brazier, A. ^{[1
]}

Venkataraman, A. ^{[9
]}

Zollweg, J. A. ^{[17
]}

Bogdanov, S. ^{[13
]}

机构：

[1] Cornell Univ, Dept Astron, Ithaca, NY 14853 USA

[2] W Virginia Univ, Dept Phys, Morgantown, WV 26506 USA

[3] Bryn Mawr Coll, Dept Phys, Bryn Mawr, PA 19010 USA

[4] Franklin & Marshall Coll, Dept Phys & Astron, Lancaster, PA 17604 USA

[5] Swinburne Univ Technol, Ctr Astrophys & Supercomp, Hawthorn, Vic 3122, Australia

[6] Columbia Univ, Columbia Astrophys Lab, New York, NY 10027 USA

[7] ATNF CSIRO, Epping, NSW 1710, Australia

[8] Arecibo Observ, NAIC, Arecibo, PR 00612 USA

[9] Netherlands Inst Radio Astron ASTRON, NL-7990 AA Dwingeloo, Netherlands

[10] Univ Amsterdam, Astron Inst Anton Pannekoek, NL-1098 SJ Amsterdam, Netherlands

[11] Univ Texas Brownsville, Ctr Gravitat Wave Astron, Brownsville, TX 78520 USA

[12] Univ British Columbia, Dept Phys & Astron, Vancouver, BC V6T 1Z1, Canada

[13] McGill Univ, Dept Phys, Montreal, PQ H3A 2T8, Canada

[14] Univ Manchester, Jodrell Bank, Ctr Astrophys, Manchester M13 9PL, Lancs, England

[15] Max Planck Inst Radioastron, D-53121 Bonn, Germany

[16] NRAO, Charlottesville, VA 22903 USA

[17] Cornell Univ, Ctr Adv Comp, Ithaca, NY 14853 USA

来源：

ASTROPHYSICAL JOURNAL | 2009年 / 703卷 / 02期

基金：

加拿大自然科学与工程研究理事会; 美国国家科学基金会; 加拿大创新基金会;

关键词：

pulsars: general; pulsars: individual (PSR J1928+15; PSR J0627+16; PSR J1909+06); surveys; MULTIFREQUENCY OBSERVATIONS; MILLISECOND PULSAR; NEUTRON-STARS; GIANT PULSES; ECLIPSING BINARY; EMISSION; DISCOVERY; BURSTS; PLASMA; CYGNUS-X-3;

D O I：

10.1088/0004-637X/703/2/2259

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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.

引用

页码：2259 / 2274

页数：16

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