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Very-high-energy $\gamma$-ray emission provides constraints on the morphology and the physics mechanisms involved in the evolution of pulsar wind nebulae (PWNe). In the Galactic plane, around $312 ^{\circ}$ of Galactic longitude, a…

High Energy Astrophysical Phenomena · Physics 2023-06-06 P. Chambéry , Y. Gallant , A. Jardin-Blicq , M. Lemoine-Goumard , V. Marandon , A. Sinha , M. Tsirou , H. E. S. S. Collaboration

We have conducted a radio pulsar survey of 56 unidentified gamma-ray sources from the 3rd EGRET catalog which are at intermediate Galactic latitudes (5 deg. < |b| < 73 deg.). For each source, four interleaved 35-minute pointings were made…

The vicinity of the unidentified EGRET source 3EG J1420-6038 has undergone extensive study in the search for counterparts, revealing the energetic young pulsar PSR J1420-6048 and its surrounding wind nebula as a likely candidate for at…

High Energy Astrophysical Phenomena · Physics 2015-05-18 Adam Van Etten , Roger W. Romani

The 44.7 ms X-ray pulsar in the supernova remnant G12.82-0.02/HESS J1813-178 has the second highest spin-down luminosity of known pulsars in the Galaxy, with E-dot=5.6e37 erg/s. Using the Green Bank Telescope, we have detected radio…

High Energy Astrophysical Phenomena · Physics 2021-08-25 F. Camilo , S. M. Ransom , J. P. Halpern , D. A. Roshi

Two new X-ray timing observations of the 44.7 ms pulsar in G12.82-0.02/HESS J1813-178 were obtained with Chandra and XMM-Newton to determine its precise spin-down rate. With a period derivative of dP/dt = 1.265E-13, PSR J1813-1749 is the…

High Energy Astrophysical Phenomena · Physics 2015-06-05 J. P. Halpern , E. V. Gotthelf , F. Camilo

With a period of 51.6 ms and spin-down power 2.2x10^{37} erg s^{-1}, PSR J2229+6114 is a compelling identification for the EGRET source 3EG J2227+6122 in which error circle it resides. Striking features of the Chandra X-ray image are an…

Astrophysics · Physics 2007-05-23 J. P. Halpern , E. V. Gotthelf , F. Camilo , B. Collins , D. J. Helfand

We discuss PSR J1740+1000, one of five pulsars recently discovered in a search of 470 square degrees at 430 MHz during the upgrade of the 305-m Arecibo telescope. The period of 154 ms and period derivative of 2.1 x 10^-14 s/s imply a…

We report the detection of pulsed X-ray emission ($4.9\sigma$) from the binary millisecond pulsar PSR J0218+4232 in a 100 ks ROSAT HRI observation. The pulse profile shows a sharp main pulse and an indication for a second weaker pulse at…

Astrophysics · Physics 2007-05-23 L. Kuiper , W. Hermsen , F. Verbunt , T. Belloni , A. Lyne

We report the discovery of gamma-ray pulsations from the nearby isolated millisecond pulsar PSR J0030+0451 with the Large Area Telescope (LAT) on the \emph{Fermi} Gamma-ray Space Telescope (formerly GLAST). This discovery makes PSR…

High Energy Astrophysical Phenomena · Physics 2009-07-22 LAT Collaboration

As part of an effort to associate the unidentified EGRET gamma-ray sources with pulsars, error boxes for 19 sources were searched using Arecibo at 327-MHz. The sources were chosen to be out-of-plane and possibly associated with the Gould…

Astrophysics · Physics 2009-11-13 D. J. Champion , M. A. McLaughlin , D. R. Lorimer

We report the discovery of a 38.5 ms X-ray pulsar in observations of the soft gamma-ray source IGR J18490-0000 with the Rossi X-ray Timing Explorer (RXTE). PSR J1849-0001 is spinning down rapidly with period derivative 1.42E-14 s/s,…

High Energy Astrophysical Phenomena · Physics 2015-05-20 E. V. Gotthelf , J. P. Halpern , R. Terrier , F. Mattana

The identity of the persistent EGRET sources in the Galactic plane is largely a mystery. For one of these, 3EG J2227+6122, our complete census of X-ray and radio sources in its error circle reveals a remarkable superposition of an…

Astrophysics · Physics 2009-10-31 J. P. Halpern , E. V. Gotthelf , K. M. Leighly , D. J. Helfand

We report on the likely detection of pulsed high-energy gamma-rays from the binary millisecond pulsar PSR J0218+4232 in 100-1000 MeV data from CGRO EGRET. Imaging analysis demonstrates that the highly significant gamma-ray source 2EG…

Astrophysics · Physics 2007-05-23 L. Kuiper , W. Hermsen , F. Verbunt , A. Lyne , I. Stairs , D. J. Thompson , G. Cusumano

We report the discovery of 70.5 ms pulsations from the X-ray source AX J1838.0-0655 using the Rossi X-ray Timing Explorer (RXTE). PSR J1838-0655 is a rotation-powered pulsar with spin-down luminosity Edot = 5.5e36 ergs/s, characteristic age…

Astrophysics · Physics 2009-11-13 E. V. Gotthelf , J. P. Halpern

The non-detection of pulsed sub-TeV gamma-rays from EGRET pulsars proves that the EGRET pulsed spectra of all gamma-ray pulsars should terminate at energies below a few hundred GeV. The spectrum of a typical integrated pulse profile…

Astrophysics · Physics 2007-05-23 O. C. de Jager , A. Konopelko , B. C. Raubenheimer , B. Visser

We report the discovery of three pulsars whose large dispersion measures and angular proximity to \sgr indicate the existence of a Galactic center population of neutron stars. The relatively long periods (0.98 to 1.48 s) most likely reflect…

Solar and Stellar Astrophysics · Physics 2015-05-13 J. S. Deneva , J. M. Cordes , T. J. W. Lazio

We report the discovery of PSR J1906+0722, a gamma-ray pulsar detected as part of a blind survey of unidentified Fermi Large Area Telescope (LAT) sources being carried out on the volunteer distributed computing system, Einstein@Home. This…

High Energy Astrophysical Phenomena · Physics 2015-08-06 C. J. Clark , H. J. Pletsch , J. Wu , L. Guillemot , M. Ackermann , B. Allen , A. de Angelis , C. Aulbert , L. Baldini , J. Ballet , G. Barbiellini , D. Bastieri , R. Bellazzini , E. Bissaldi , O. Bock , R. Bonino , E. Bottacini , T. J. Brandt , J. Bregeon , P. Bruel , S. Buson , G. A. Caliandro , R. A. Cameron , M. Caragiulo , P. A. Caraveo , C. Cecchi , D. J. Champion , E. Charles , A. Chekhtman , J. Chiang , G. Chiaro , S. Ciprini , R. Claus , J. Cohen-Tanugi , A. Cuéllar , S. Cutini , F. D'Ammando , R. Desiante , P. S. Drell , H. B. Eggenstein , C. Favuzzi , H. Fehrmann , E. C. Ferrara , W. B. Focke , A. Franckowiak , P. Fusco , F. Gargano , D. Gasparrini , N. Giglietto , F. Giordano , T. Glanzman , G. Godfrey , I. A. Grenier , J. E. Grove , S. Guiriec , A. K. Harding , E. Hays , J. W. Hewitt , A. B. Hill , D. Horan , X. Hou , T. Jogler , A. S. Johnson , G. Jóhannesson , M. Kramer , F. Krauss , M. Kuss , H. Laffon , S. Larsson , L. Latronico , J. Li , L. Li , F. Longo , F. Loparco , M. N. Lovellette , P. Lubrano , B. Machenschalk , A. Manfreda , M. Marelli , M. Mayer , M. N. Mazziotta , P. F. Michelson , T. Mizuno , M. E. Monzani , A. Morselli , I. V. Moskalenko , S. Murgia , E. Nuss , T. Ohsugi , M. Orienti , E. Orlando , F. de Palma , D. Paneque , M. Pesce-Rollins , F. Piron , G. Pivato , S. Rainò , R. Rando , M. Razzano , A. Reimer , P. M. Saz Parkinson , M. Schaal , A. Schulz , C. Sgrò , E. J. Siskind , F. Spada , G. Spandre , P. Spinelli , D. J. Suson , H. Takahashi , J. B. Thayer , L. Tibaldo , P. Torne , D. F. Torres , G. Tosti , E. Troja , G. Vianello , K. S. Wood , M. Wood , M. Yassine

Discovered after the end of the Compton Gamma-Ray Observatory mission, the radio pulsar PSR J2021+3651 was long considered a likely counterpart of the high-energy gamma-ray source 2CG 075+00 = 3EG J2021+3716 = GeV J2020+3658, but it could…

We report the detection of gamma-ray pulsations from the high-magnetic-field rotation-powered pulsar PSR J1119-6127 using data from the Fermi Large Area Telescope. The gamma-ray light curve of PSR J1119-6127 shows a single, wide peak offset…

The major programme for observing young, non-recycled pulsars with the Parkes telescope has transitioned from a narrow-band system to an ultra-wideband system capable of observing between 704 and 4032 MHz. We report here on the initial two…

High Energy Astrophysical Phenomena · Physics 2021-02-10 Simon Johnston , C. Sobey , S. Dai , M. Keith , M. Kerr , R. N. Manchester , L. S. Oswald , A. Parthasarathy , R. M. Shannon , P. Weltevrede