Discovery of millisecond pulsars in radio searches of southern Fermi Large Area Telescope sources
Identifieur interne : 007038 ( Main/Merge ); précédent : 007037; suivant : 007039Discovery of millisecond pulsars in radio searches of southern Fermi Large Area Telescope sources
Auteurs : M. J. Keith [Australie] ; S. Johnston [Australie] ; P. S. Ray [États-Unis] ; E. C. Ferrara [États-Unis] ; P. M. Saz Parkinson [États-Unis] ; Ö. Celik [États-Unis] ; A. Belfiore [États-Unis, Italie] ; D. Donato [États-Unis] ; C. C. Cheung [États-Unis] ; A. A. Abdo [États-Unis] ; F. Camilo [États-Unis] ; P. C. C. Freire [Allemagne] ; L. Guillemot [Allemagne] ; A. K. Harding [États-Unis] ; M. Kramer [Allemagne, Royaume-Uni] ; P. F. Michelson [États-Unis] ; S. M. Ransom [États-Unis] ; R. W. Romani [États-Unis] ; D. A. Smith [France] ; D. J. Thompson [États-Unis] ; P. Weltevrede [Royaume-Uni] ; K. S. Wood [États-Unis]Source :
- Monthly Notices of the Royal Astronomical Society [ 0035-8711 ] ; 2011.
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Abstract
Using the Parkes Radio Telescope, we have carried out deep observations of 11 unassociated gamma-ray sources. Periodicity searches of these data have discovered two millisecond pulsars, PSRJ1103-5403 (1FGLJ1103.9-5355) and PSRJ2241-5236 (1FGLJ2241.9-5236), and a long-period pulsar, PSRJ1604-44 (1FGLJ1604.7-4443). In addition, we searched for but did not detect any radio pulsations from six gamma-ray pulsars discovered by the Fermi satellite to a level of ˜0.04 mJy (for pulsars with a 10 per cent duty cycle). The timing of the millisecond pulsar PSRJ1103-5403 has shown that its position is 9 arcmin from the centroid of the gamma-ray source. Since these observations were carried out, independent evidence has shown that 1FGL J1103.9-5355 is associated with the flat spectrum radio source PKS 1101-536. It appears certain that the pulsar is not associated with the gamma-ray source, despite the seemingly low probability of a chance detection of a radio millisecond pulsar. We consider that PSRJ1604-44 is a chance discovery of a weak, long-period pulsar and is unlikely to be associated with 1FGL J1604.7-4443. PSR J2241-5236 has a spin period of 2.2 ms and orbits a very low mass companion with a 3.5-h orbital period. The relatively high flux density and low dispersion measure of PSR J2241-5236 make it an excellent candidate for high precision timing experiments. The gamma rays of 1FGL J2241.9-5236 have a spectrum that is well modelled by a power law with an exponential cut-off, and phase binning with the radio ephemeris results in a multipeaked gamma-ray pulse profile. Observations with Chandra have identified a coincident X-ray source within 0.1 arcsec of the position of the pulsar obtained by radio timing.
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Belfiore</name><affiliation wicri:level="1"><inist:fA14 i1="04"><s1>Santa Cruz Institute for Particle Physics, Department of Physics and Department of Astronomy and Astrophysics, University of California at Santa Cruz</s1><s2>Santa Cruz, CA 95064</s2><s3>USA</s3><sZ>5 aut.</sZ><sZ>7 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>Santa Cruz, CA 95064</wicri:noRegion></affiliation><affiliation wicri:level="1"><inist:fA14 i1="07"><s1>INAF-Istituto di Astrofisica Spaziale e Fisica Cosmica</s1><s2>20133 Milano</s2><s3>ITA</s3><sZ>7 aut.</sZ></inist:fA14><country>Italie</country><wicri:noRegion>INAF-Istituto di Astrofisica Spaziale e Fisica Cosmica</wicri:noRegion></affiliation><affiliation wicri:level="1"><inist:fA14 i1="08"><s1>Dipartimento di Fisica Teorica e Nucleare (DFNT), Università di Pavia</s1><s2>27100 Pavia</s2><s3>ITA</s3><sZ>7 aut.</sZ></inist:fA14><country>Italie</country><wicri:noRegion>27100 Pavia</wicri:noRegion></affiliation></author><author><name sortKey="Donato, D" sort="Donato, D" uniqKey="Donato D" first="D." last="Donato">D. Donato</name><affiliation wicri:level="1"><inist:fA14 i1="05"><s1>Center for Research and Exploration in Space Science and Technology (CRESST) and NASA Goddard Space Flight Center</s1><s2>Greenbelt, MD 20771</s2><s3>USA</s3><sZ>6 aut.</sZ><sZ>8 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>Center for Research and Exploration in Space Science and Technology (CRESST) and NASA Goddard Space Flight Center</wicri:noRegion></affiliation><affiliation wicri:level="4"><inist:fA14 i1="09"><s1>Departments of Physics and Gastronomy, University of Maryland</s1><s2>College Park, MD 20742</s2><s3>USA</s3><sZ>8 aut.</sZ></inist:fA14><country>États-Unis</country><placeName><settlement type="city">College Park (Maryland)</settlement><region type="state">Maryland</region></placeName><orgName type="university">Université du Maryland</orgName></affiliation></author><author><name sortKey="Cheung, C C" sort="Cheung, C C" uniqKey="Cheung C" first="C. C." last="Cheung">C. C. Cheung</name><affiliation wicri:level="1"><inist:fA14 i1="10"><s1>National Research Council Research Associate, National Academy of Sciences</s1><s2>Washington, DC 20001</s2><s3>USA</s3><sZ>9 aut.</sZ><sZ>10 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>Washington, DC 20001</wicri:noRegion></affiliation></author><author><name sortKey="Abdo, A A" sort="Abdo, A A" uniqKey="Abdo A" first="A. A." last="Abdo">A. A. Abdo</name><affiliation wicri:level="1"><inist:fA14 i1="10"><s1>National Research Council Research Associate, National Academy of Sciences</s1><s2>Washington, DC 20001</s2><s3>USA</s3><sZ>9 aut.</sZ><sZ>10 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>Washington, DC 20001</wicri:noRegion></affiliation></author><author><name sortKey="Camilo, F" sort="Camilo, F" uniqKey="Camilo F" first="F." last="Camilo">F. Camilo</name><affiliation wicri:level="1"><inist:fA14 i1="11"><s1>Columbia Astrophysics Laboratory Columbia University</s1><s2>New York, NY 10027</s2><s3>USA</s3><sZ>11 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>Columbia Astrophysics Laboratory Columbia University</wicri:noRegion></affiliation></author><author><name sortKey="Freire, P C C" sort="Freire, P C C" uniqKey="Freire P" first="P. C. C." last="Freire">P. C. C. Freire</name><affiliation wicri:level="3"><inist:fA14 i1="12"><s1>Max-Planck-Institut für Radioastronomie, Auf dem Hiigel 69</s1><s2>53121 Bonn</s2><s3>DEU</s3><sZ>12 aut.</sZ><sZ>13 aut.</sZ><sZ>15 aut.</sZ></inist:fA14><country>Allemagne</country><placeName><region type="land" nuts="1">Rhénanie-du-Nord-Westphalie</region><region type="district" nuts="2">District de Cologne</region><settlement type="city">Bonn</settlement></placeName></affiliation></author><author><name sortKey="Guillemot, L" sort="Guillemot, L" uniqKey="Guillemot L" first="L." last="Guillemot">L. Guillemot</name><affiliation wicri:level="3"><inist:fA14 i1="12"><s1>Max-Planck-Institut für Radioastronomie, Auf dem Hiigel 69</s1><s2>53121 Bonn</s2><s3>DEU</s3><sZ>12 aut.</sZ><sZ>13 aut.</sZ><sZ>15 aut.</sZ></inist:fA14><country>Allemagne</country><placeName><region type="land" nuts="1">Rhénanie-du-Nord-Westphalie</region><region type="district" nuts="2">District de Cologne</region><settlement type="city">Bonn</settlement></placeName></affiliation></author><author><name sortKey="Harding, A K" sort="Harding, A K" uniqKey="Harding A" first="A. K." last="Harding">A. K. Harding</name><affiliation wicri:level="1"><inist:fA14 i1="03"><s1>NASA Goddard Space Flight Center</s1><s2>Greenbelt, MD 20771</s2><s3>USA</s3><sZ>4 aut.</sZ><sZ>6 aut.</sZ><sZ>14 aut.</sZ><sZ>20 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>NASA Goddard Space Flight Center</wicri:noRegion></affiliation></author><author><name sortKey="Kramer, M" sort="Kramer, M" uniqKey="Kramer M" first="M." last="Kramer">M. Kramer</name><affiliation wicri:level="3"><inist:fA14 i1="12"><s1>Max-Planck-Institut für Radioastronomie, Auf dem Hiigel 69</s1><s2>53121 Bonn</s2><s3>DEU</s3><sZ>12 aut.</sZ><sZ>13 aut.</sZ><sZ>15 aut.</sZ></inist:fA14><country>Allemagne</country><placeName><region type="land" nuts="1">Rhénanie-du-Nord-Westphalie</region><region type="district" nuts="2">District de Cologne</region><settlement type="city">Bonn</settlement></placeName></affiliation><affiliation wicri:level="4"><inist:fA14 i1="13"><s1>Jodrell Bank Centre for Astrophysics, School of Physics and Astronomy, The University of Manchester</s1><s2>Manchester M13 9PL</s2><s3>GBR</s3><sZ>15 aut.</sZ><sZ>21 aut.</sZ></inist:fA14><country>Royaume-Uni</country><placeName><settlement type="city">Manchester</settlement><region type="nation">Angleterre</region><region nuts="2" type="region">Grand Manchester</region></placeName><orgName type="university">Université de Manchester</orgName></affiliation></author><author><name sortKey="Michelson, P F" sort="Michelson, P F" uniqKey="Michelson P" first="P. F." last="Michelson">P. F. Michelson</name><affiliation wicri:level="1"><inist:fA14 i1="14"><s1>W. W. Hansen Experimental Physics Laboratory, Kavli Institute for Particle Astrophysics and Cosmology, Department of Physics and SLAC National Accelerator Laboratory, Stanford University</s1><s2>Stanford, CA 94305</s2><s3>USA</s3><sZ>16 aut.</sZ><sZ>18 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>Stanford, CA 94305</wicri:noRegion></affiliation></author><author><name sortKey="Ransom, S M" sort="Ransom, S M" uniqKey="Ransom S" first="S. M." last="Ransom">S. M. Ransom</name><affiliation wicri:level="1"><inist:fA14 i1="15"><s1>National Radio Astronomy Observatory (NRAO)</s1><s2>Charlottesville, VA 22903</s2><s3>USA</s3><sZ>17 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>National Radio Astronomy Observatory (NRAO)</wicri:noRegion></affiliation></author><author><name sortKey="Romani, R W" sort="Romani, R W" uniqKey="Romani R" first="R. W." last="Romani">R. W. Romani</name><affiliation wicri:level="1"><inist:fA14 i1="14"><s1>W. W. Hansen Experimental Physics Laboratory, Kavli Institute for Particle Astrophysics and Cosmology, Department of Physics and SLAC National Accelerator Laboratory, Stanford University</s1><s2>Stanford, CA 94305</s2><s3>USA</s3><sZ>16 aut.</sZ><sZ>18 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>Stanford, CA 94305</wicri:noRegion></affiliation></author><author><name sortKey="Smith, D A" sort="Smith, D A" uniqKey="Smith D" first="D. A." last="Smith">D. A. Smith</name><affiliation wicri:level="1"><inist:fA14 i1="16"><s1>Centre, d'Études Nucléaires de Bordeaux Gradignan, Université Bordeaux 1, CNRS/IN2p3</s1><s2>33175 Gradignan</s2><s3>FRA</s3><sZ>19 aut.</sZ></inist:fA14><country>France</country><wicri:noRegion>33175 Gradignan</wicri:noRegion><wicri:noRegion>CNRS/IN2p3</wicri:noRegion><wicri:noRegion>33175 Gradignan</wicri:noRegion></affiliation></author><author><name sortKey="Thompson, D J" sort="Thompson, D J" uniqKey="Thompson D" first="D. J." last="Thompson">D. J. Thompson</name><affiliation wicri:level="1"><inist:fA14 i1="03"><s1>NASA Goddard Space Flight Center</s1><s2>Greenbelt, MD 20771</s2><s3>USA</s3><sZ>4 aut.</sZ><sZ>6 aut.</sZ><sZ>14 aut.</sZ><sZ>20 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>NASA Goddard Space Flight Center</wicri:noRegion></affiliation></author><author><name sortKey="Weltevrede, P" sort="Weltevrede, P" uniqKey="Weltevrede P" first="P." last="Weltevrede">P. Weltevrede</name><affiliation wicri:level="4"><inist:fA14 i1="13"><s1>Jodrell Bank Centre for Astrophysics, School of Physics and Astronomy, The University of Manchester</s1><s2>Manchester M13 9PL</s2><s3>GBR</s3><sZ>15 aut.</sZ><sZ>21 aut.</sZ></inist:fA14><country>Royaume-Uni</country><placeName><settlement type="city">Manchester</settlement><region type="nation">Angleterre</region><region nuts="2" type="region">Grand Manchester</region></placeName><orgName type="university">Université de Manchester</orgName></affiliation></author><author><name sortKey="Wood, K S" sort="Wood, K S" uniqKey="Wood K" first="K. S." last="Wood">K. S. Wood</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Space Science Division, Naval Research Laboratory</s1><s2>Washington, DC 20375</s2><s3>USA</s3><sZ>3 aut.</sZ><sZ>22 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>Washington, DC 20375</wicri:noRegion></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">INIST</idno><idno type="inist">11-0287659</idno><date when="2011">2011</date><idno type="stanalyst">PASCAL 11-0287659 INIST</idno><idno type="RBID">Pascal:11-0287659</idno><idno type="wicri:Area/PascalFrancis/Corpus">001C26</idno><idno type="wicri:Area/PascalFrancis/Curation">004318</idno><idno type="wicri:Area/PascalFrancis/Checkpoint">001B87</idno><idno type="wicri:explorRef" wicri:stream="PascalFrancis" wicri:step="Checkpoint">001B87</idno><idno type="wicri:doubleKey">0035-8711:2011:Keith M:discovery:of:millisecond</idno><idno type="wicri:Area/Main/Merge">007038</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">Discovery of millisecond pulsars in radio searches of southern Fermi Large Area Telescope sources</title><author><name sortKey="Keith, M J" sort="Keith, M J" uniqKey="Keith M" first="M. J." last="Keith">M. J. Keith</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Australia Telescope National Facility, CSIRO</s1><s2>Epping, NSW 1710</s2><s3>AUS</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ></inist:fA14><country>Australie</country><wicri:noRegion>Epping, NSW 1710</wicri:noRegion></affiliation></author><author><name sortKey="Johnston, S" sort="Johnston, S" uniqKey="Johnston S" first="S." last="Johnston">S. Johnston</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Australia Telescope National Facility, CSIRO</s1><s2>Epping, NSW 1710</s2><s3>AUS</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ></inist:fA14><country>Australie</country><wicri:noRegion>Epping, NSW 1710</wicri:noRegion></affiliation></author><author><name sortKey="Ray, P S" sort="Ray, P S" uniqKey="Ray P" first="P. S." last="Ray">P. S. Ray</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Space Science Division, Naval Research Laboratory</s1><s2>Washington, DC 20375</s2><s3>USA</s3><sZ>3 aut.</sZ><sZ>22 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>Washington, DC 20375</wicri:noRegion></affiliation></author><author><name sortKey="Ferrara, E C" sort="Ferrara, E C" uniqKey="Ferrara E" first="E. C." last="Ferrara">E. C. Ferrara</name><affiliation wicri:level="1"><inist:fA14 i1="03"><s1>NASA Goddard Space Flight Center</s1><s2>Greenbelt, MD 20771</s2><s3>USA</s3><sZ>4 aut.</sZ><sZ>6 aut.</sZ><sZ>14 aut.</sZ><sZ>20 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>NASA Goddard Space Flight Center</wicri:noRegion></affiliation></author><author><name sortKey="Saz Parkinson, P M" sort="Saz Parkinson, P M" uniqKey="Saz Parkinson P" first="P. M." last="Saz Parkinson">P. M. Saz Parkinson</name><affiliation wicri:level="1"><inist:fA14 i1="04"><s1>Santa Cruz Institute for Particle Physics, Department of Physics and Department of Astronomy and Astrophysics, University of California at Santa Cruz</s1><s2>Santa Cruz, CA 95064</s2><s3>USA</s3><sZ>5 aut.</sZ><sZ>7 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>Santa Cruz, CA 95064</wicri:noRegion></affiliation></author><author><name sortKey="Celik, O" sort="Celik, O" uniqKey="Celik O" first="Ö." last="Celik">Ö. Celik</name><affiliation wicri:level="1"><inist:fA14 i1="03"><s1>NASA Goddard Space Flight Center</s1><s2>Greenbelt, MD 20771</s2><s3>USA</s3><sZ>4 aut.</sZ><sZ>6 aut.</sZ><sZ>14 aut.</sZ><sZ>20 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>NASA Goddard Space Flight Center</wicri:noRegion></affiliation><affiliation wicri:level="1"><inist:fA14 i1="05"><s1>Center for Research and Exploration in Space Science and Technology (CRESST) and NASA Goddard Space Flight Center</s1><s2>Greenbelt, MD 20771</s2><s3>USA</s3><sZ>6 aut.</sZ><sZ>8 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>Center for Research and Exploration in Space Science and Technology (CRESST) and NASA Goddard Space Flight Center</wicri:noRegion></affiliation><affiliation wicri:level="1"><inist:fA14 i1="06"><s1>Department of Physics and Center for Space Sciences and Technology, University of Maryland Baltimore County</s1><s2>Baltimore, MD 21250</s2><s3>USA</s3><sZ>6 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>Baltimore, MD 21250</wicri:noRegion></affiliation></author><author><name sortKey="Belfiore, A" sort="Belfiore, A" uniqKey="Belfiore A" first="A." last="Belfiore">A. Belfiore</name><affiliation wicri:level="1"><inist:fA14 i1="04"><s1>Santa Cruz Institute for Particle Physics, Department of Physics and Department of Astronomy and Astrophysics, University of California at Santa Cruz</s1><s2>Santa Cruz, CA 95064</s2><s3>USA</s3><sZ>5 aut.</sZ><sZ>7 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>Santa Cruz, CA 95064</wicri:noRegion></affiliation><affiliation wicri:level="1"><inist:fA14 i1="07"><s1>INAF-Istituto di Astrofisica Spaziale e Fisica Cosmica</s1><s2>20133 Milano</s2><s3>ITA</s3><sZ>7 aut.</sZ></inist:fA14><country>Italie</country><wicri:noRegion>INAF-Istituto di Astrofisica Spaziale e Fisica Cosmica</wicri:noRegion></affiliation><affiliation wicri:level="1"><inist:fA14 i1="08"><s1>Dipartimento di Fisica Teorica e Nucleare (DFNT), Università di Pavia</s1><s2>27100 Pavia</s2><s3>ITA</s3><sZ>7 aut.</sZ></inist:fA14><country>Italie</country><wicri:noRegion>27100 Pavia</wicri:noRegion></affiliation></author><author><name sortKey="Donato, D" sort="Donato, D" uniqKey="Donato D" first="D." last="Donato">D. Donato</name><affiliation wicri:level="1"><inist:fA14 i1="05"><s1>Center for Research and Exploration in Space Science and Technology (CRESST) and NASA Goddard Space Flight Center</s1><s2>Greenbelt, MD 20771</s2><s3>USA</s3><sZ>6 aut.</sZ><sZ>8 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>Center for Research and Exploration in Space Science and Technology (CRESST) and NASA Goddard Space Flight Center</wicri:noRegion></affiliation><affiliation wicri:level="4"><inist:fA14 i1="09"><s1>Departments of Physics and Gastronomy, University of Maryland</s1><s2>College Park, MD 20742</s2><s3>USA</s3><sZ>8 aut.</sZ></inist:fA14><country>États-Unis</country><placeName><settlement type="city">College Park (Maryland)</settlement><region type="state">Maryland</region></placeName><orgName type="university">Université du Maryland</orgName></affiliation></author><author><name sortKey="Cheung, C C" sort="Cheung, C C" uniqKey="Cheung C" first="C. C." last="Cheung">C. C. Cheung</name><affiliation wicri:level="1"><inist:fA14 i1="10"><s1>National Research Council Research Associate, National Academy of Sciences</s1><s2>Washington, DC 20001</s2><s3>USA</s3><sZ>9 aut.</sZ><sZ>10 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>Washington, DC 20001</wicri:noRegion></affiliation></author><author><name sortKey="Abdo, A A" sort="Abdo, A A" uniqKey="Abdo A" first="A. A." last="Abdo">A. A. Abdo</name><affiliation wicri:level="1"><inist:fA14 i1="10"><s1>National Research Council Research Associate, National Academy of Sciences</s1><s2>Washington, DC 20001</s2><s3>USA</s3><sZ>9 aut.</sZ><sZ>10 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>Washington, DC 20001</wicri:noRegion></affiliation></author><author><name sortKey="Camilo, F" sort="Camilo, F" uniqKey="Camilo F" first="F." last="Camilo">F. Camilo</name><affiliation wicri:level="1"><inist:fA14 i1="11"><s1>Columbia Astrophysics Laboratory Columbia University</s1><s2>New York, NY 10027</s2><s3>USA</s3><sZ>11 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>Columbia Astrophysics Laboratory Columbia University</wicri:noRegion></affiliation></author><author><name sortKey="Freire, P C C" sort="Freire, P C C" uniqKey="Freire P" first="P. C. C." last="Freire">P. C. C. Freire</name><affiliation wicri:level="3"><inist:fA14 i1="12"><s1>Max-Planck-Institut für Radioastronomie, Auf dem Hiigel 69</s1><s2>53121 Bonn</s2><s3>DEU</s3><sZ>12 aut.</sZ><sZ>13 aut.</sZ><sZ>15 aut.</sZ></inist:fA14><country>Allemagne</country><placeName><region type="land" nuts="1">Rhénanie-du-Nord-Westphalie</region><region type="district" nuts="2">District de Cologne</region><settlement type="city">Bonn</settlement></placeName></affiliation></author><author><name sortKey="Guillemot, L" sort="Guillemot, L" uniqKey="Guillemot L" first="L." last="Guillemot">L. Guillemot</name><affiliation wicri:level="3"><inist:fA14 i1="12"><s1>Max-Planck-Institut für Radioastronomie, Auf dem Hiigel 69</s1><s2>53121 Bonn</s2><s3>DEU</s3><sZ>12 aut.</sZ><sZ>13 aut.</sZ><sZ>15 aut.</sZ></inist:fA14><country>Allemagne</country><placeName><region type="land" nuts="1">Rhénanie-du-Nord-Westphalie</region><region type="district" nuts="2">District de Cologne</region><settlement type="city">Bonn</settlement></placeName></affiliation></author><author><name sortKey="Harding, A K" sort="Harding, A K" uniqKey="Harding A" first="A. K." last="Harding">A. K. Harding</name><affiliation wicri:level="1"><inist:fA14 i1="03"><s1>NASA Goddard Space Flight Center</s1><s2>Greenbelt, MD 20771</s2><s3>USA</s3><sZ>4 aut.</sZ><sZ>6 aut.</sZ><sZ>14 aut.</sZ><sZ>20 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>NASA Goddard Space Flight Center</wicri:noRegion></affiliation></author><author><name sortKey="Kramer, M" sort="Kramer, M" uniqKey="Kramer M" first="M." last="Kramer">M. Kramer</name><affiliation wicri:level="3"><inist:fA14 i1="12"><s1>Max-Planck-Institut für Radioastronomie, Auf dem Hiigel 69</s1><s2>53121 Bonn</s2><s3>DEU</s3><sZ>12 aut.</sZ><sZ>13 aut.</sZ><sZ>15 aut.</sZ></inist:fA14><country>Allemagne</country><placeName><region type="land" nuts="1">Rhénanie-du-Nord-Westphalie</region><region type="district" nuts="2">District de Cologne</region><settlement type="city">Bonn</settlement></placeName></affiliation><affiliation wicri:level="4"><inist:fA14 i1="13"><s1>Jodrell Bank Centre for Astrophysics, School of Physics and Astronomy, The University of Manchester</s1><s2>Manchester M13 9PL</s2><s3>GBR</s3><sZ>15 aut.</sZ><sZ>21 aut.</sZ></inist:fA14><country>Royaume-Uni</country><placeName><settlement type="city">Manchester</settlement><region type="nation">Angleterre</region><region nuts="2" type="region">Grand Manchester</region></placeName><orgName type="university">Université de Manchester</orgName></affiliation></author><author><name sortKey="Michelson, P F" sort="Michelson, P F" uniqKey="Michelson P" first="P. F." last="Michelson">P. F. Michelson</name><affiliation wicri:level="1"><inist:fA14 i1="14"><s1>W. W. Hansen Experimental Physics Laboratory, Kavli Institute for Particle Astrophysics and Cosmology, Department of Physics and SLAC National Accelerator Laboratory, Stanford University</s1><s2>Stanford, CA 94305</s2><s3>USA</s3><sZ>16 aut.</sZ><sZ>18 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>Stanford, CA 94305</wicri:noRegion></affiliation></author><author><name sortKey="Ransom, S M" sort="Ransom, S M" uniqKey="Ransom S" first="S. M." last="Ransom">S. M. Ransom</name><affiliation wicri:level="1"><inist:fA14 i1="15"><s1>National Radio Astronomy Observatory (NRAO)</s1><s2>Charlottesville, VA 22903</s2><s3>USA</s3><sZ>17 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>National Radio Astronomy Observatory (NRAO)</wicri:noRegion></affiliation></author><author><name sortKey="Romani, R W" sort="Romani, R W" uniqKey="Romani R" first="R. W." last="Romani">R. W. Romani</name><affiliation wicri:level="1"><inist:fA14 i1="14"><s1>W. W. Hansen Experimental Physics Laboratory, Kavli Institute for Particle Astrophysics and Cosmology, Department of Physics and SLAC National Accelerator Laboratory, Stanford University</s1><s2>Stanford, CA 94305</s2><s3>USA</s3><sZ>16 aut.</sZ><sZ>18 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>Stanford, CA 94305</wicri:noRegion></affiliation></author><author><name sortKey="Smith, D A" sort="Smith, D A" uniqKey="Smith D" first="D. A." last="Smith">D. A. Smith</name><affiliation wicri:level="1"><inist:fA14 i1="16"><s1>Centre, d'Études Nucléaires de Bordeaux Gradignan, Université Bordeaux 1, CNRS/IN2p3</s1><s2>33175 Gradignan</s2><s3>FRA</s3><sZ>19 aut.</sZ></inist:fA14><country>France</country><wicri:noRegion>33175 Gradignan</wicri:noRegion><wicri:noRegion>CNRS/IN2p3</wicri:noRegion><wicri:noRegion>33175 Gradignan</wicri:noRegion></affiliation></author><author><name sortKey="Thompson, D J" sort="Thompson, D J" uniqKey="Thompson D" first="D. J." last="Thompson">D. J. Thompson</name><affiliation wicri:level="1"><inist:fA14 i1="03"><s1>NASA Goddard Space Flight Center</s1><s2>Greenbelt, MD 20771</s2><s3>USA</s3><sZ>4 aut.</sZ><sZ>6 aut.</sZ><sZ>14 aut.</sZ><sZ>20 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>NASA Goddard Space Flight Center</wicri:noRegion></affiliation></author><author><name sortKey="Weltevrede, P" sort="Weltevrede, P" uniqKey="Weltevrede P" first="P." last="Weltevrede">P. Weltevrede</name><affiliation wicri:level="4"><inist:fA14 i1="13"><s1>Jodrell Bank Centre for Astrophysics, School of Physics and Astronomy, The University of Manchester</s1><s2>Manchester M13 9PL</s2><s3>GBR</s3><sZ>15 aut.</sZ><sZ>21 aut.</sZ></inist:fA14><country>Royaume-Uni</country><placeName><settlement type="city">Manchester</settlement><region type="nation">Angleterre</region><region nuts="2" type="region">Grand Manchester</region></placeName><orgName type="university">Université de Manchester</orgName></affiliation></author><author><name sortKey="Wood, K S" sort="Wood, K S" uniqKey="Wood K" first="K. S." last="Wood">K. S. Wood</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Space Science Division, Naval Research Laboratory</s1><s2>Washington, DC 20375</s2><s3>USA</s3><sZ>3 aut.</sZ><sZ>22 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>Washington, DC 20375</wicri:noRegion></affiliation></author></analytic><series><title level="j" type="main">Monthly Notices of the Royal Astronomical Society</title><title level="j" type="abbreviated">Mon. Not. R. Astron. Soc.</title><idno type="ISSN">0035-8711</idno><imprint><date when="2011">2011</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">Monthly Notices of the Royal Astronomical Society</title><title level="j" type="abbreviated">Mon. Not. R. Astron. Soc.</title><idno type="ISSN">0035-8711</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Dispersion measure</term><term>Flux density</term><term>Gamma radiation</term><term>Gamma ray source</term><term>High density</term><term>Millisecond pulsar</term><term>Orbits</term><term>Periodicity</term><term>Positions</term><term>Power law</term><term>Probability</term><term>Pulse shape</term><term>Radio pulsation</term><term>Radio spectrum</term><term>Radiopulsar</term><term>Timing</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Pulsar milliseconde</term><term>Pulsar radio</term><term>Source Rγ</term><term>Périodicité</term><term>Pulsation radio</term><term>Rayonnement gamma</term><term>Timing</term><term>Position</term><term>Spectre radio</term><term>Probabilité</term><term>Orbite</term><term>Densité élevée</term><term>Densité flux</term><term>Mesure dispersion</term><term>Loi puissance</term><term>Forme impulsion</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Using the Parkes Radio Telescope, we have carried out deep observations of 11 unassociated gamma-ray sources. Periodicity searches of these data have discovered two millisecond pulsars, PSRJ1103-5403 (1FGLJ1103.9-5355) and PSRJ2241-5236 (1FGLJ2241.9-5236), and a long-period pulsar, PSRJ1604-44 (1FGLJ1604.7-4443). In addition, we searched for but did not detect any radio pulsations from six gamma-ray pulsars discovered by the Fermi satellite to a level of ˜0.04 mJy (for pulsars with a 10 per cent duty cycle). The timing of the millisecond pulsar PSRJ1103-5403 has shown that its position is 9 arcmin from the centroid of the gamma-ray source. Since these observations were carried out, independent evidence has shown that 1FGL J1103.9-5355 is associated with the flat spectrum radio source PKS 1101-536. It appears certain that the pulsar is not associated with the gamma-ray source, despite the seemingly low probability of a chance detection of a radio millisecond pulsar. We consider that PSRJ1604-44 is a chance discovery of a weak, long-period pulsar and is unlikely to be associated with 1FGL J1604.7-4443. PSR J2241-5236 has a spin period of 2.2 ms and orbits a very low mass companion with a 3.5-h orbital period. The relatively high flux density and low dispersion measure of PSR J2241-5236 make it an excellent candidate for high precision timing experiments. The gamma rays of 1FGL J2241.9-5236 have a spectrum that is well modelled by a power law with an exponential cut-off, and phase binning with the radio ephemeris results in a multipeaked gamma-ray pulse profile. Observations with Chandra have identified a coincident X-ray source within 0.1 arcsec of the position of the pulsar obtained by radio timing.</div></front></TEI><affiliations><list><country><li>Allemagne</li><li>Australie</li><li>France</li><li>Italie</li><li>Royaume-Uni</li><li>États-Unis</li></country><region><li>Angleterre</li><li>District de Cologne</li><li>Grand Manchester</li><li>Maryland</li><li>Rhénanie-du-Nord-Westphalie</li></region><settlement><li>Bonn</li><li>College Park (Maryland)</li><li>Manchester</li></settlement><orgName><li>Université de Manchester</li><li>Université du Maryland</li></orgName></list><tree><country name="Australie"><noRegion><name sortKey="Keith, M J" sort="Keith, M J" uniqKey="Keith M" first="M. J." last="Keith">M. J. Keith</name></noRegion><name sortKey="Johnston, S" sort="Johnston, S" uniqKey="Johnston S" first="S." last="Johnston">S. Johnston</name></country><country name="États-Unis"><noRegion><name sortKey="Ray, P S" sort="Ray, P S" uniqKey="Ray P" first="P. S." last="Ray">P. S. Ray</name></noRegion><name sortKey="Abdo, A A" sort="Abdo, A A" uniqKey="Abdo A" first="A. A." last="Abdo">A. A. Abdo</name><name sortKey="Belfiore, A" sort="Belfiore, A" uniqKey="Belfiore A" first="A." last="Belfiore">A. Belfiore</name><name sortKey="Camilo, F" sort="Camilo, F" uniqKey="Camilo F" first="F." last="Camilo">F. Camilo</name><name sortKey="Celik, O" sort="Celik, O" uniqKey="Celik O" first="Ö." last="Celik">Ö. Celik</name><name sortKey="Celik, O" sort="Celik, O" uniqKey="Celik O" first="Ö." last="Celik">Ö. Celik</name><name sortKey="Celik, O" sort="Celik, O" uniqKey="Celik O" first="Ö." last="Celik">Ö. Celik</name><name sortKey="Cheung, C C" sort="Cheung, C C" uniqKey="Cheung C" first="C. C." last="Cheung">C. C. Cheung</name><name sortKey="Donato, D" sort="Donato, D" uniqKey="Donato D" first="D." last="Donato">D. Donato</name><name sortKey="Donato, D" sort="Donato, D" uniqKey="Donato D" first="D." last="Donato">D. Donato</name><name sortKey="Ferrara, E C" sort="Ferrara, E C" uniqKey="Ferrara E" first="E. C." last="Ferrara">E. C. Ferrara</name><name sortKey="Harding, A K" sort="Harding, A K" uniqKey="Harding A" first="A. K." last="Harding">A. K. Harding</name><name sortKey="Michelson, P F" sort="Michelson, P F" uniqKey="Michelson P" first="P. F." last="Michelson">P. F. Michelson</name><name sortKey="Ransom, S M" sort="Ransom, S M" uniqKey="Ransom S" first="S. M." last="Ransom">S. M. Ransom</name><name sortKey="Romani, R W" sort="Romani, R W" uniqKey="Romani R" first="R. W." last="Romani">R. W. Romani</name><name sortKey="Saz Parkinson, P M" sort="Saz Parkinson, P M" uniqKey="Saz Parkinson P" first="P. M." last="Saz Parkinson">P. M. Saz Parkinson</name><name sortKey="Thompson, D J" sort="Thompson, D J" uniqKey="Thompson D" first="D. J." last="Thompson">D. J. Thompson</name><name sortKey="Wood, K S" sort="Wood, K S" uniqKey="Wood K" first="K. S." last="Wood">K. S. Wood</name></country><country name="Italie"><noRegion><name sortKey="Belfiore, A" sort="Belfiore, A" uniqKey="Belfiore A" first="A." last="Belfiore">A. Belfiore</name></noRegion><name sortKey="Belfiore, A" sort="Belfiore, A" uniqKey="Belfiore A" first="A." last="Belfiore">A. Belfiore</name></country><country name="Allemagne"><region name="Rhénanie-du-Nord-Westphalie"><name sortKey="Freire, P C C" sort="Freire, P C C" uniqKey="Freire P" first="P. C. C." last="Freire">P. C. C. Freire</name></region><name sortKey="Guillemot, L" sort="Guillemot, L" uniqKey="Guillemot L" first="L." last="Guillemot">L. Guillemot</name><name sortKey="Kramer, M" sort="Kramer, M" uniqKey="Kramer M" first="M." last="Kramer">M. Kramer</name></country><country name="Royaume-Uni"><region name="Angleterre"><name sortKey="Kramer, M" sort="Kramer, M" uniqKey="Kramer M" first="M." last="Kramer">M. Kramer</name></region><name sortKey="Weltevrede, P" sort="Weltevrede, P" uniqKey="Weltevrede P" first="P." last="Weltevrede">P. Weltevrede</name></country><country name="France"><noRegion><name sortKey="Smith, D A" sort="Smith, D A" uniqKey="Smith D" first="D. A." last="Smith">D. A. Smith</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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