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Book ; Online: The International Pulsar Timing Array

Verbiest, J. P. W. / Lentati, L. / Hobbs, G. / van Haasteren, R. / Demorest, P. B. / Janssen, G. H. / Wang, J. -B. / Desvignes, G. / Caballero, R. N. / Keith, M. J. / Champion, D. J. / Arzoumanian, Z. / Babak, S. / Bassa, C. G. / Bhat, N. D. R. / Brazier, A. / Brem, P. / Burgay, M. / Burke-Spolaor, S. /
Chamberlin, S. J. / Chatterjee, S. / Christy, B. / Cognard, I. / Cordes, J. M. / Dai, S. / Dolch, T. / Ellis, J. A. / Ferdman, R. D. / Fonseca, E. / Gair, J. R. / Garver-Daniels, N. E. / Gentile, P. / Gonzalez, M. E. / Graikou, E. / Guillemot, L. / Hessels, J. W. T. / Jones, G. / Karuppusamy, R. / Kerr, M. / Kramer, M. / Lam, M. T. / Lasky, P. D. / Lassus, A. / Lazarus, P. / Lazio, T. J. W. / Lee, K. J. / Levin, L. / Liu, K. / Lynch, R. S. / Lyne, A. G. / Mckee, J. / McLaughlin, M. A. / McWilliams, S. T. / Madison, D. R. / Manchester, R. N. / Mingarelli, C. M. F. / Nice, D. J. / Oslowski, S. / Palliyaguru, N. T. / Pennucci, T. T. / Perera, B. B. P. / Perrodin, D. / Possenti, A. / Petiteau, A. / Ransom, S. M. / Reardon, D. / Rosado, P. A. / Sanidas, S. A. / Sesana, A. / Shaifullah, G. / Shannon, R. M. / Siemens, X. / Simon, J. / Smits, R. / Spiewak, R. / Stairs, I. H. / Stappers, B. W. / Stinebring, D. R. / Stovall, K. / Swiggum, J. K. / Taylor, S. R. / Theureau, G. / Tiburzi, C. / Toomey, L. / Vallisneri, M. / van Straten, W. / Vecchio, A. / Wang, Y. / Wen, L. / You, X. P. / Zhu, W. W. / Zhu, X. -J.

First Data Release

2016  

Abstract: The highly stable spin of neutron stars can be exploited for a variety of (astro-)physical investigations. In particular arrays of pulsars with rotational periods of the order of milliseconds can be used to detect correlated signals such as those caused ... ...

Abstract The highly stable spin of neutron stars can be exploited for a variety of (astro-)physical investigations. In particular arrays of pulsars with rotational periods of the order of milliseconds can be used to detect correlated signals such as those caused by gravitational waves. Three such "Pulsar Timing Arrays" (PTAs) have been set up around the world over the past decades and collectively form the "International" PTA (IPTA). In this paper, we describe the first joint analysis of the data from the three regional PTAs, i.e. of the first IPTA data set. We describe the available PTA data, the approach presently followed for its combination and suggest improvements for future PTA research. Particular attention is paid to subtle details (such as underestimation of measurement uncertainty and long-period noise) that have often been ignored but which become important in this unprecedentedly large and inhomogeneous data set. We identify and describe in detail several factors that complicate IPTA research and provide recommendations for future pulsar timing efforts. The first IPTA data release presented here (and available online) is used to demonstrate the IPTA's potential of improving upon gravitational-wave limits placed by individual PTAs by a factor of ~2 and provides a 2-sigma limit on the dimensionless amplitude of a stochastic GWB of 1.7x10^{-15} at a frequency of 1 yr^{-1}. This is 1.7 times less constraining than the limit placed by (Shannon et al. 2015), due mostly to the more recent, high-quality data they used.

Comment: 25 pages, 6 tables, 5 figures. Accepted for publication in MNRAS
Keywords Astrophysics - Instrumentation and Methods for Astrophysics
Subject code 333
Publishing date 2016-02-11
Publishing country us
Document type Book ; Online
Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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