Results 51 to 60 of about 13,579 (182)

High signal-to-noise ratio observations and the ultimate limits of precision pulsar timing

, 2011
We demonstrate that the sensitivity of high-precision pulsar timing experiments will be ultimately limited by the broadband intensity modulation that is intrinsic to the pulsar's stochastic radio signal. That is, as the peak flux of the pulsar approaches
Andrews, Backer, Backer, Bailes, Bailes, Bartel, Bhat, Boynton, Britton, Cairns, Cognard, Coles, Cordes, Cordes, Cordes, Davis, Dewey, Drake, Durdin, Foster, G. B. Hobbs, Groth, Groth, Groth, Gwinn, Gwinn, Gwinn, Gwinn, Gwinn, Gwinn, Hankins, Hankins, Hankins, Helfand, Helfand, Hellings, Hoaglin, Hobbs, Hobbs, Hotan, Hotan, Hotan, Hubert, Hyvarinen, Jenet, Jenet, Jenet, Johnson, Johnston, Karastergiou, Karastergiou, Kaspi, Kinkhabwala, Kramer, Kramer, Kramer, Kramer, Kramer, Kulkarni, Liu, Lyne, M. Bailes, Manchester, Manchester, Manchester, Matsakis, Navarro, P. Demorest, Petit, Rathnasree, Rickett, Rodin, S. Osłowski, Sallmen, Sandhu, Shannon, Smits, Staelin, Stairs, Staveley-Smith, Taylor, Taylor, Taylor, van Haasteren, van Straten, van Straten, van Straten, van Straten, van Straten, van Straten, Verbiest, Vivekanand, Vivekanand, W. van Straten, Wang, Weisberg, Yan, Yardley   +97 more
core   +1 more source

A Method to Estimate the Cooling Time of Ultra-Relativistic Electrons in Pulsar Wind Nebulae [PDF]

American Journal of Astronomy and Astrophysics, 2015
Pulsar is a highly magnetized rotating neutron star. It continuously emits a wind of relativistic electrons and positrons. This wind creates an electron-positron-cloud around the pulsar. This cloud, which is full of relativistic electrons and positrons, is called a Pulsar Wind Nebula (PWN).
openaire   +1 more source

Pulsar Timing with the Fermi LAT

, 2010
We present an overview of precise pulsar timing using data from the Large Area Telescope (LAT) on Fermi. We describe the analysis techniques including a maximum likelihood method for determining pulse times of arrival from unbinned photon data.
Kerr, Matthew, Parent, Damien, PSC, the Fermi, Ray, Paul S.   +3 more
core   +1 more source

The FAST Galactic Plane Pulsar Snapshot Survey. IX. Timing Three Binary Pulsars with Wide Orbits and Low Orbital Eccentricities

The Astrophysical Journal
Current pulsar timing models face challenges when applied to binary pulsars with wide orbits and low orbital eccentricities. The conventional Damour–Deruelle ( DD ) model accurately characterizes the orbits of such systems, but it suffers from strong ...
Z. L. Yang, J. L. Han, W. Q. Su, C. Wang, J. P. Yuan, T. Wang, Yi Yan, J. Xu, W. C. Jing, P. F. Wang, N. N. Cai, D. J. Zhou, X. J. Chen, D. Zhao   +13 more
doaj   +1 more source

The NANOGrav 15 yr Data Set: Detector Characterization and Noise Budget

The Astrophysical Journal Letters, 2023
Pulsar timing arrays (PTAs) are galactic-scale gravitational wave (GW) detectors. Each individual arm, composed of a millisecond pulsar, a radio telescope, and a kiloparsecs-long path, differs in its properties but, in aggregate, can be used to extract ...
Gabriella Agazie, Akash Anumarlapudi, Anne M. Archibald, Zaven Arzoumanian, Paul T. Baker, Bence Bécsy, Laura Blecha, Adam Brazier, Paul R. Brook, Sarah Burke-Spolaor, Maria Charisi, Shami Chatterjee, Tyler Cohen, James M. Cordes, Neil J. Cornish, Fronefield Crawford, H. Thankful Cromartie, Kathryn Crowter, Megan E. DeCesar, Paul B. Demorest, Timothy Dolch, Brendan Drachler, Elizabeth C. Ferrara, William Fiore, Emmanuel Fonseca, Gabriel E. Freedman, Nate Garver-Daniels, Peter A. Gentile, Joseph Glaser, Deborah C. Good, Lydia Guertin, Kayhan Gültekin, Jeffrey S. Hazboun, Ross J. Jennings, Aaron D. Johnson, Megan L. Jones, Andrew R. Kaiser, David L. Kaplan, Luke Zoltan Kelley, Matthew Kerr, Joey S. Key, Nima Laal, Michael T. Lam, William G. Lamb, T. Joseph W. Lazio, Natalia Lewandowska, Tingting Liu, Duncan R. Lorimer, Jing Luo, Ryan S. Lynch, Chung-Pei Ma, Dustin R. Madison, Alexander McEwen, James W. McKee, Maura A. McLaughlin, Natasha McMann, Bradley W. Meyers, Chiara M. F. Mingarelli, Andrea Mitridate, Cherry Ng, David J. Nice, Stella Koch Ocker, Ken D. Olum, Timothy T. Pennucci, Benetge B. P. Perera, Nihan S. Pol, Henri A. Radovan, Scott M. Ransom, Paul S. Ray, Joseph D. Romano, Shashwat C. Sardesai, Ann Schmiedekamp, Carl Schmiedekamp, Kai Schmitz, Brent J. Shapiro-Albert, Xavier Siemens, Joseph Simon, Magdalena S. Siwek, Ingrid H. Stairs, Daniel R. Stinebring, Kevin Stovall, Abhimanyu Susobhanan, Joseph K. Swiggum, Stephen R. Taylor, Jacob E. Turner, Caner Unal, Michele Vallisneri, Sarah J. Vigeland, Haley M. Wahl, Caitlin A. Witt, Olivia Young, The NANOGrav Collaboration   +91 more
doaj   +1 more source

Pushchino multibeam pulsar search VI. Method of pulsar timing using bad timed data

A method for pulsar timing based on monitoring data from the 3-th diagramm of the Large Phased Array (LPA LPI) radio telescope is proposed. In our observations, recorders with quartz clock generators were used as local clocks. Such recorders initially had an accuracy and hardware reference to the UTC time scale insufficient for pulsar timing.
Andrianov, S. A., Potapov, V. A., Tyul'bashev, S. A., Logvinenko, S. V., Oreshko, V. V.   +4 more
openaire   +2 more sources

Probing Populations of Dark Stellar Remnants in the Globular Clusters 47 Tuc and Terzan 5 Using Pulsar Timing

The Astrophysical Journal
We present a new method to combine multimass equilibrium dynamical models and pulsar timing data to constrain the mass distribution and remnant populations of Milky Way globular clusters (GCs).
Peter J. Smith, Vincent Hénault-Brunet, Nolan Dickson, Mark Gieles, Holger Baumgardt   +4 more
doaj   +1 more source

The Third Fermi Large Area Telescope Catalog of Gamma-Ray Pulsars

The Astrophysical Journal, 2023
We present 294 pulsars found in GeV data from the Large Area Telescope (LAT) on the Fermi Gamma-ray Space Telescope. Another 33 millisecond pulsars (MSPs) discovered in deep radio searches of LAT sources will likely reveal pulsations once phase-connected
D. A. Smith, S. Abdollahi, M. Ajello, M. Bailes, L. Baldini, J. Ballet, M. G. Baring, C. Bassa, J. Becerra Gonzalez, R. Bellazzini, A. Berretta, B. Bhattacharyya, E. Bissaldi, R. Bonino, E. Bottacini, J. Bregeon, P. Bruel, M. Burgay, T. H. Burnett, R. A. Cameron, F. Camilo, R. Caputo, P. A. Caraveo, E. Cavazzuti, G. Chiaro, S. Ciprini, C. J. Clark, I. Cognard, A. Corongiu, P. Cristarella Orestano, M. Crnogorcevic, A. Cuoco, S. Cutini, F. D’Ammando, A. de Angelis, M. E. DeCesar, S. De Gaetano, R. de Menezes, J. Deneva, F. de Palma, N. Di Lalla, F. Dirirsa, L. Di Venere, A. Domínguez, D. Dumora, S. J. Fegan, E. C. Ferrara, A. Fiori, H. Fleischhack, C. Flynn, A. Franckowiak, P. C. C. Freire, Y. Fukazawa, P. Fusco, G. Galanti, V. Gammaldi, F. Gargano, D. Gasparrini, F. Giacchino, N. Giglietto, F. Giordano, M. Giroletti, D. Green, I. A. Grenier, L. Guillemot, S. Guiriec, M. Gustafsson, A. K. Harding, E. Hays, J. W. Hewitt, D. Horan, X. Hou, F. Jankowski, R. P. Johnson, T. J. Johnson, S. Johnston, J. Kataoka, M. J. Keith, M. Kerr, M. Kramer, M. Kuss, L. Latronico, S.-H. Lee, D. Li, J. Li, B. Limyansky, F. Longo, F. Loparco, L. Lorusso, M. N. Lovellette, M. Lower, P. Lubrano, A. G. Lyne, Y. Maan, S. Maldera, R. N. Manchester, A. Manfreda, M. Marelli, G. Martí-Devesa, M. N. Mazziotta, J. E. McEnery, I. Mereu, P. F. Michelson, M. Mickaliger, W. Mitthumsiri, T. Mizuno, A. A. Moiseev, M. E. Monzani, A. Morselli, M. Negro, R. Nemmen, L. Nieder, E. Nuss, N. Omodei, M. Orienti, E. Orlando, J. F. Ormes, M. Palatiello, D. Paneque, G. Panzarini, A. Parthasarathy, M. Persic, M. Pesce-Rollins, R. Pillera, H. Poon, T. A. Porter, A. Possenti, G. Principe, S. Rainò, R. Rando, S. M. Ransom, P. S. Ray, M. Razzano, S. Razzaque, A. Reimer, O. Reimer, N. Renault-Tinacci, R. W. Romani, M. Sánchez-Conde, P. M. Saz Parkinson, L. Scotton, D. Serini, C. Sgrò, R. Shannon, V. Sharma, Z. Shen, E. J. Siskind, G. Spandre, P. Spinelli, B. W. Stappers, T. E. Stephens, D. J. Suson, S. Tabassum, H. Tajima, D. Tak, G. Theureau, D. J. Thompson, O. Tibolla, D. F. Torres, J. Valverde, C. Venter, Z. Wadiasingh, N. Wang, N. Wang, P. Wang, P. Weltevrede, K. Wood, J. Yan, G. Zaharijas, C. Zhang, W. Zhu   +170 more
doaj   +1 more source

Time delay estimation method of X-ray pulsar observed profile based on the optimal frequency band

Acta Physica Sinica, 2016
In order to improve the time delay estimation accuracy of the observed profile in the X-ray pulsar based navigation, the spectral characteristics of the observed profile of X-ray pulsar and the drawback of the classical Taylor fast Fourier transform (FFT) time delay estimation method are analyzed. It is found that when estimating the time delay, we can
null Fang Hai-Yan, null Liu Bing, null Li Xiao-Ping, null Sun Hai-Feng, null Xue Meng-Fan, null Shen Li-Rong, null Zhu Jin-Peng   +6 more
openaire   +1 more source

Observations of microglitches in HartRAO radio pulsars [PDF]

, 2010
A detailed observation of microglitch phenomenon in relatively slow radio pulsars is presented. Our analyses for these small amplitude jumps in pulse rotation frequency ($\nu$) and/or spin down rate ($\dot{\nu}$) combine the traditional manual detection ...
A. E. Chukwude, Alpar, Alpar, Arons, Bevington, Chukwude, Cordes, Cordes, Cordes, D'Alessandro, D'Alessandro, D'Alessandro, Flanagan, Glampedakis, Goldreich, Hobbs, J. O. Urama, Janssen, Link, Lorimer, Lyne, Lyne, Lyne, Lyne, Manchester, Melatos, Melatos, Melatos, Middleditch, Pacini, Peralta, Ruderman, Shemar, Urama, Urama, Wang, Warszawski   +36 more
core   +1 more source