English
 
Help Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT

Released

Journal Article

The effect of timing noise on targeted and narrow-band coherent searches for continuous gravitational waves

MPS-Authors
/persons/resource/persons40534

Prix,  R.
Observational Relativity and Cosmology, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

External Resource
No external resources are shared
Fulltext (restricted access)
There are currently no full texts shared for your IP range.
Fulltext (public)

1410.8044.pdf
(Preprint), 808KB

PhysRevD.91_062009.pdf
(Any fulltext), 365KB

Supplementary Material (public)
There is no public supplementary material available
Citation

Ashton, G., Jones, D. I., & Prix, R. (2015). The effect of timing noise on targeted and narrow-band coherent searches for continuous gravitational waves. Physical Review D, 91: 062009. Retrieved from 10.1103/PhysRevD.91.062009.


Cite as: https://hdl.handle.net/11858/00-001M-0000-0024-279E-F
Abstract
Most continuous gravitational-wave searches use Taylor expansions in the phase to model the spindown of neutron stars. Studies of pulsars demonstrate that their electromagnetic (EM) emissions suffer from timing noise, small deviations in the phase from Taylor expansion models. How the mechanism producing EM emission is related to any continuous gravitational-wave (CW) emission is unknown; if they either interact or are locked in phase then the CW will also experience timing noise. Any disparity between the signal and the search template used in matched filtering methods will result in a loss of signal-to-noise ratio (SNR), referred to as 'mismatch'. In this work we assume the CW suffers a similar level of timing noise to its EM counterpart. We inject and recover fake CW signals, which include timing noise generated from observational data on the Crab pulsar. Measuring the mismatch over durations of order ~ 10 months, the effect is for the most part found to be small. This suggests recent so-called 'narrow-band' searches which placed upper limits on the signals from the Crab and Vela pulsars will not be significantly affected. At a fixed observation time, we find the mismatch depends upon the observation epoch. Considering the averaged mismatch as a function of observation time, we find that it increases as a power law with time, and so may become relevant in long baseline searches.