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Ismaël Cognard
Researcher at University of Orléans
Publications - 268
Citations - 15874
Ismaël Cognard is an academic researcher from University of Orléans. The author has contributed to research in topics: Pulsar & Millisecond pulsar. The author has an hindex of 59, co-authored 243 publications receiving 12806 citations. Previous affiliations of Ismaël Cognard include Centre national de la recherche scientifique & Max Planck Society.
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Journal ArticleDOI
The second fermi large area telescope catalog of gamma-ray pulsars
A. A. Abdo,A. A. Abdo,Marco Ajello,Alice Allafort,Luca Baldini,Jean Ballet,Guido Barbiellini,Guido Barbiellini,Matthew G. Baring,Denis Bastieri,Denis Bastieri,Andrea Belfiore,Andrea Belfiore,Andrea Belfiore,Ronaldo Bellazzini,Bhaswati Bhattacharyya,Elisabetta Bissaldi,E. D. Bloom,Emanuele Bonamente,Emanuele Bonamente,Eugenio Bottacini,Terri Brandt,Johan Bregeon,M. Brigida,M. Brigida,P. Bruel,R. Buehler,M. Burgay,T. H. Burnett,G. Busetto,G. Busetto,S. Buson,S. Buson,G. A. Caliandro,R. A. Cameron,Fernando Camilo,Fernando Camilo,P. A. Caraveo,J. M. Casandjian,C. Cecchi,C. Cecchi,Omer Celik,Omer Celik,Eric Charles,Sylvain Chaty,R. C. G. Chaves,A. Chekhtman,A. Chekhtman,A. W. Chen,James Chiang,G. Chiaro,Stefano Ciprini,R. Claus,Ismaël Cognard,Johann Cohen-Tanugi,L. R. Cominsky,Jan Conrad,S. Cutini,Filippo D'Ammando,A. De Angelis,M. E. DeCesar,M. E. DeCesar,A. De Luca,P. R. den Hartog,F. de Palma,F. de Palma,Charles D. Dermer,Gregory Desvignes,Gregory Desvignes,Seth Digel,L. Di Venere,Persis S. Drell,Alex Drlica-Wagner,R. Dubois,D. Dumora,Cristobal M. Espinoza,L. Falletti,C. Favuzzi,C. Favuzzi,Elizabeth C. Ferrara,W. B. Focke,A. Franckowiak,Paulo C. C. Freire,Stefan Funk,P. Fusco,P. Fusco,F. Gargano,Dario Gasparrini,S. Germani,S. Germani,Nicola Giglietto,Nicola Giglietto,Paolo Giommi,Francesco Giordano,Francesco Giordano,Marcello Giroletti,T. Glanzman,G. Godfrey,Eric V. Gotthelf,I. A. Grenier,M.-H. Grondin,M.-H. Grondin,J. E. Grove,L. Guillemot,Sylvain Guiriec,D. Hadasch,Y. Hanabata,Alice K. Harding,M. Hayashida,M. Hayashida,E. Hays,Jason W. T. Hessels,Jason W. T. Hessels,John W. Hewitt,A. B. Hill,A. B. Hill,D. Horan,Xian Hou,R. E. Hughes,Miranda Jackson,Miranda Jackson,Gemma H. Janssen,T. Jogler,Gudlaugur Johannesson,R. P. Johnson,A. S. Johnson,Tyrel J. Johnson,Tyrel J. Johnson,W. N. Johnson,Simon Johnston,T. Kamae,Jun Kataoka,Michael Keith,Matthew Kerr,Jürgen Knödlseder,Jürgen Knödlseder,Michael Kramer,Michael Kramer,M. Kuss,J. Lande,S. Larsson,Luca Latronico,Marianne Lemoine-Goumard,Francesco Longo,Francesco Longo,F. Loparco,F. Loparco,M. N. Lovellette,P. Lubrano,P. Lubrano,Andrew Lyne,R. N. Manchester,M. Marelli,Francesco Massaro,M. Mayer,M. N. Mazziotta,Julie McEnery,Julie McEnery,Maura McLaughlin,J. Mehault,Peter F. Michelson,Roberto Mignani,Roberto Mignani,Roberto Mignani,W. Mitthumsiri,Tsunefumi Mizuno,A. A. Moiseev,A. A. Moiseev,M. E. Monzani,A. Morselli,Igor V. Moskalenko,S. Murgia,Takeshi Nakamori,Rodrigo Nemmen,E. Nuss,Masanori Ohno,T. Ohsugi,M. Orienti,E. Orlando,J. F. Ormes,David Paneque,David Paneque,J. H. Panetta,D. Parent,D. Parent,J. S. Perkins,Melissa Pesce-Rollins,M. Pierbattista,F. Piron,G. Pivato,Holger J. Pletsch,T. A. Porter,A. Possenti,S. Rainò,S. Rainò,Robert R. Rando,Robert R. Rando,Scott M. Ransom,Paul S. Ray,M. Razzano,M. Razzano,Nanda Rea,A. Reimer,Olaf Reimer,N. Renault,T. Reposeur,Steven Ritz,Roger W. Romani,M. Roth,R. Rousseau,Jayashree Roy,John J. Ruan,Alberto Sartori,P. M. Saz Parkinson,Jeffrey D. Scargle,André Schulz,Carmelo Sgrò,Ryan Shannon,E. J. Siskind,David A. Smith,Gloria Spandre,P. Spinelli,P. Spinelli,Benjamin Stappers,Andrew W. Strong,D. J. Suson,Hiromitsu Takahashi,J. G. Thayer,J. B. Thayer,Gilles Theureau,D. J. Thompson,Stephen E. Thorsett,L. Tibaldo,O. Tibolla,M. Tinivella,Diego F. Torres,Diego F. Torres,Gino Tosti,Gino Tosti,Eleonora Troja,Eleonora Troja,Yasunobu Uchiyama,T. L. Usher,Justin Vandenbroucke,V. Vasileiou,Christo Venter,Giacomo Vianello,V. Vitale,V. Vitale,Na Wang,Patrick Weltevrede,Brian L Winer,M. T. Wolff,D. L. Wood,D. L. Wood,K. S. Wood,Matthew Wood,Zhenwei Yang +257 more
TL;DR: In this article, a catalog of gamma-ray pulsar detections using three years of data acquired by the Large Area Telescope (LAT) on the Fermi satellite is presented.
Journal ArticleDOI
The International Pulsar Timing Array project: using pulsars as a gravitational wave detector
George Hobbs,Anne M. Archibald,Zaven Arzoumanian,Donald C. Backer,Matthew Bailes,N. D. R. Bhat,M. Burgay,Sarah Burke-Spolaor,Sarah Burke-Spolaor,David Champion,David Champion,Ismaël Cognard,William A. Coles,J. M. Cordes,Paul Demorest,Gregory Desvignes,Robert D. Ferdman,Lee Samuel Finn,Paulo C. C. Freire,Marjorie Gonzalez,Jason W. T. Hessels,Aidan Hotan,Gemma H. Janssen,Fredrick A. Jenet,A. Jessner,Christine Jordan,V. M. Kaspi,Michael Kramer,Michael Kramer,V. I. Kondratiev,Joseph Lazio,K. Lazaridis,Kejia Lee,Yuri Levin,Andrea N. Lommen,Duncan R. Lorimer,Ryan S. Lynch,Andrew Lyne,Richard N. Manchester,Maura McLaughlin,David J. Nice,Stefan Oslowski,Stefan Oslowski,M. Pilia,Andrea Possenti,M. B. Purver,Scott M. Ransom,John Reynolds,S. Sanidas,John Sarkissian,Alberto Sesana,Ryan Shannon,Xavier Siemens,Ingrid H. Stairs,Ben Stappers,Daniel R. Stinebring,Gilles Theureau,R. van Haasteren,W. van Straten,Joris P. W. Verbiest,D. R. B. Yardley,D. R. B. Yardley,X. P. You +62 more
TL;DR: The International Pulsar Timing Array (IPTA) project as mentioned in this paper combines observations of pulsars from both northern and southern hemisphere observatories with the main aim of detecting ultra-low frequency (similar to 10(-9)-10(-8) Hz) gravitational waves.
Journal ArticleDOI
European Pulsar Timing Array Limits On An Isotropic Stochastic Gravitational-Wave Background
Lindley Lentati,Stephen Taylor,Stephen Taylor,Chiara M. F. Mingarelli,Chiara M. F. Mingarelli,Alberto Sesana,S. Sanidas,Alberto Vecchio,R. Nicolas Caballero,Kejia Lee,Rutger van Haasteren,Stanislav Babak,Cees Bassa,P. Brem,Marta Burgay,D. J. Champion,Ismaël Cognard,Gregory Desvignes,Jonathan R. Gair,Lucas Guillemot,Jason W. T. Hessels,Jason W. T. Hessels,Gemma H. Janssen,Ramesh Karuppusamy,Michael Kramer,A. Lassus,P. Lazarus,Kuo Liu,Stefan Oslowski,Stefan Oslowski,Delphine Perrodin,Antoine Petiteau,Andrea Possenti,M. B. Purver,Pablo Rosado,R. Smits,Ben Stappers,Gilles Theureau,Caterina Tiburzi,Joris P. W. Verbiest +39 more
TL;DR: In this article, the authors presented new limits on an isotropic stochastic gravitational wave background (GWB) using a six pulsar dataset spanning 18 yr of observations from the 2015 European Pulsar Timing Array data release.
Journal ArticleDOI
The First Fermi Large Area Telescope Catalog of Gamma-ray Pulsars
A. A. Abdo,A. A. Abdo,Markus Ackermann,Marco Ajello,W. B. Atwood,Magnus Axelsson,Luca Baldini,Jean Ballet,Guido Barbiellini,Guido Barbiellini,Matthew G. Baring,Denis Bastieri,Denis Bastieri,B. M. Baughman,Keith Bechtol,Ronaldo Bellazzini,B. Berenji,Roger Blandford,E. D. Bloom,Emanuele Bonamente,Emanuele Bonamente,A. W. Borgland,Johan Bregeon,Alessandro Brez,M. Brigida,M. Brigida,P. Bruel,T. H. Burnett,S. Buson,G. A. Caliandro,G. A. Caliandro,R. A. Cameron,Fernando Camilo,P. A. Caraveo,J. M. Casandjian,Claudia Cecchi,Claudia Cecchi,Omer Celik,Omer Celik,E. Charles,A. Chekhtman,A. Chekhtman,C. C. Cheung,James Chiang,Stefano Ciprini,Stefano Ciprini,R. Claus,Ismaël Cognard,Johann Cohen-Tanugi,L. R. Cominsky,Jan Conrad,Jan Conrad,Robin H. D. Corbet,Robin H. D. Corbet,S. Cutini,P. R. den Hartog,Charles D. Dermer,A. De Angelis,A. De Luca,A. De Luca,F. de Palma,F. de Palma,Seth Digel,M. Dormody,E. Do Couto E Silva,Persis S. Drell,R. Dubois,D. Dumora,Cristobal M. Espinoza,C. Farnier,C. Favuzzi,C. Favuzzi,S. J. Fegan,Elizabeth C. Ferrara,W. B. Focke,P. Fortin,M. Frailis,Paulo C. C. Freire,Yasushi Fukazawa,Stefan Funk,P. Fusco,P. Fusco,F. Gargano,Dario Gasparrini,Neil Gehrels,Neil Gehrels,S. Germani,S. Germani,Gianluca Giavitto,B. Giebels,Nicola Giglietto,Nicola Giglietto,Paolo Giommi,F. Giordano,F. Giordano,T. Glanzman,G. Godfrey,Eric V. Gotthelf,I. A. Grenier,M.-H. Grondin,J. E. Grove,L. Guillemot,Sylvain Guiriec,C. Gwon,Y. Hanabata,Alice K. Harding,M. Hayashida,E. Hays,R. E. Hughes,Miranda Jackson,Miranda Jackson,Gudlaugur Johannesson,A. S. Johnson,R. P. Johnson,Tyrel J. Johnson,Tyrel J. Johnson,W. N. Johnson,Simon Johnston,T. Kamae,Gottfried Kanbach,V. M. Kaspi,Hideaki Katagiri,Jun Kataoka,Jun Kataoka,Nobuyuki Kawai,Matthew Kerr,Jürgen Knödlseder,Martin Kocian,Michael Kramer,Michael Kramer,M. Kuss,J. Lande,Luca Latronico,M. Lemoine-Goumard,Margaret A. Livingstone,Francesco Longo,Francesco Longo,F. Loparco,F. Loparco,B. Lott,M. N. Lovellette,P. Lubrano,P. Lubrano,Andrew Lyne,G. M. Madejski,A. Makeev,A. Makeev,Richard N. Manchester,M. Marelli,M. N. Mazziotta,W. McConville,W. McConville,Julie McEnery,S. McGlynn,S. McGlynn,C. Meurer,Peter F. Michelson,Teresa Mineo,W. Mitthumsiri,Tsunefumi Mizuno,A. A. Moiseev,A. A. Moiseev,C. Monte,C. Monte,M. E. Monzani,A. Morselli,Igor V. Moskalenko,S. Murgia,Takeshi Nakamori,P. L. Nolan,J. P. Norris,A. Noutsos,E. Nuss,T. Ohsugi,Nicola Omodei,E. Orlando,Jonathan F. Ormes,M. Ozaki,David Paneque,J. H. Panetta,D. Parent,V. Pelassa,M. Pepe,M. Pepe,Melissa Pesce-Rollins,F. Piron,T. A. Porter,S. Rainò,S. Rainò,Riccardo Rando,Riccardo Rando,Scott M. Ransom,Paul S. Ray,M. Razzano,Nanda Rea,A. Reimer,Olaf Reimer,T. Reposeur,Steven Ritz,A. Y. Rodriguez,Roger W. Romani,M. Roth,Felix Ryde,Felix Ryde,Hartmut Sadrozinski,David Sánchez,A. Sander,P. M. Saz Parkinson,Jeffrey D. Scargle,T. L. Schalk,A. Sellerholm,Carmelo Sgrò,E. J. Siskind,David S. Smith,P. D. Smith,Gloria Spandre,P. Spinelli,P. Spinelli,Ben Stappers,Jean-Luc Starck,E. Striani,E. Striani,M. S. Strickman,Andrew W. Strong,D. J. Suson,Hiroyasu Tajima,Hiromitsu Takahashi,Tadayuki Takahashi,Takaaki Tanaka,J. B. Thayer,J. G. Thayer,G. Theureau,D. J. Thompson,Stephen E. Thorsett,L. Tibaldo,Omar Tibolla,Diego F. Torres,Diego F. Torres,Gino Tosti,Gino Tosti,A. Tramacere,Yasunobu Uchiyama,T. L. Usher,A. Van Etten,V. Vasileiou,V. Vasileiou,Christo Venter,Christo Venter,N. Vilchez,V. Vitale,V. Vitale,A. P. Waite,P. Wang,Na Wang,K. Watters,Patrick Weltevrede,Brian L Winer,K. S. Wood,T. Ylinen,T. Ylinen,M. Ziegler +260 more
TL;DR: In this article, the authors presented 46 high-confidence pulsed detections using the first six months of data taken by the Large Area Telescope (LAT), Fermi's main instrument.
Journal ArticleDOI
A strong magnetic field around the supermassive black hole at the centre of the Galaxy
Ralph Eatough,Heino Falcke,Heino Falcke,Heino Falcke,Ramesh Karuppusamy,Kejia Lee,D. J. Champion,Evan Keane,Gregory Desvignes,Dominic Schnitzeler,Laura Spitler,Michael Kramer,Michael Kramer,Bernd Klein,Bernd Klein,C. G. Bassa,Geoffrey C. Bower,Andreas Brunthaler,Ismaël Cognard,Ismaël Cognard,Adam Deller,Paul Demorest,Paulo C. C. Freire,Alexander Kraus,Andrew Lyne,A. Noutsos,Ben Stappers,Norbert Wex +27 more
TL;DR: Multi-frequency radio measurements of a newly discovered pulsar close to the Galactic Centre are reported and it is shown that the pulsar’s unusually large Faraday rotation indicates that there is a dynamically important magnetic field near the black hole.