European Pulsar Timing Array Limits On An Isotropic Stochastic Gravitational-Wave Background

Lindley Lentati, Stephen R. Taylor, Chiara M. F. Mingarelli, Alberto Sesana, Sotiris A. Sanidas, Alberto Vecchio, R. Nicolas Caballero, K. J. Lee, Rutger van Haasteren, Stanislav Babak, Cees G. Bassa, Patrick Brem, Marta Burgay, David J. Champion, Ismael Cognard, Gregory Desvignes, Jonathan R. Gair, Lucas Guillemot, Jason W. T. Hessels, Gemma H. JanssenRamesh Karuppusamy, Michael Kramer, Antoine Lassus, Patrick Lazarus, Kuo Liu, Stefan Osłowski, Delphine Perrodin, Antoine Petiteau, Andrea Possenti, Mark B. Purver, Pablo A. Rosado, Roy Smits, Ben Stappers, Gilles Theureau, Caterina Tiburzi, Joris P. W. Verbiest

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Abstract

We present 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. Performing a Bayesian analysis, we fit simultaneously for the intrinsic noise parameters for each pulsar, along with common correlated signals including clock, and Solar System ephemeris errors, obtaining a robust 95$\%$ upper limit on the dimensionless strain amplitude $A$ of the background of $A $G\muc^2$\Omega^\mathrm{relic}_\mathrm{gw}(f)h^2
Original languageEnglish
Pages (from-to)2576-2598
JournalRoyal Astronomical Society. Monthly Notices
Volume453
Issue number3
Early online date31 Aug 2015
DOIs
Publication statusPublished - 1 Nov 2015

Keywords

  • astro-ph.CO
  • astro-ph.IM

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