1990
DOI: 10.1086/169195
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Constructing a pulsar timing array

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Cited by 494 publications
(405 citation statements)
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“…Each pulsar and the Earth can be considered as free masses whose positions respond to changes in the space-time metric. A passing gravitational wave perturbs the metric and hence affects the pulse travel time and the measured arrival time at Earth [8,11,28]. If the uncertainty in the pulse arrival time is σ and the total observing time is T , then the "detector" is sensitive to a dimensionless strain (or metric perturbation) of…”
Section: Gravitational Wave Backgroundmentioning
confidence: 99%
See 1 more Smart Citation
“…Each pulsar and the Earth can be considered as free masses whose positions respond to changes in the space-time metric. A passing gravitational wave perturbs the metric and hence affects the pulse travel time and the measured arrival time at Earth [8,11,28]. If the uncertainty in the pulse arrival time is σ and the total observing time is T , then the "detector" is sensitive to a dimensionless strain (or metric perturbation) of…”
Section: Gravitational Wave Backgroundmentioning
confidence: 99%
“…We gain an additional factor 1/ √ N PSR from a correlation of many pulsars, where N PSR is the number of timed pulsars in the PTA. While a minimum of seven pulsars is required for calibration and cross-correlation purposes [11], ideally, a much larger N PSR should be included and a very large fraction of the sky should be covered by the PTA in order to identify large-scale spatial correlations. In summary, with the SKA sensitivity and a large number of MSPs to be discovered and timed in the PTA, the SKA will provide a huge leap in sensitivity of many orders of magnitude.…”
Section: Experimental Strategymentioning
confidence: 99%
“…Our first results are described in Foster & Backer (1990). The observations are conducted every two months at 800 and 1400 MHz.…”
Section: Pulsar Timing Array Experimentsmentioning
confidence: 99%
“…In the nanohertz frequency range (1-100 nHz), high-precision timing observations of millisecond pulsars (pulsar timing arrays -PTAs) provide a unique means of detecting GWs. With the concept proposed decades ago (Sazhin 1978;Detweiler 1979;Hellings & Downs 1983;Foster & Backer 1990), there are now three major PTA projects around the globe, namely, the Parkes Pulsar Timing Array (PPTA; Hobbs 2013), the European Pulsar Timing Array (Kramer & Champion 2013), and NANOGrav (McLaughlin 2013). While these PTAs have individually collected high-quality data spanning 5 yrs for ∼20 pulsars and produced some astrophysically interesting results (e.g., Shannon et al 2013), they have also been combined to form the International Pulsar Timing Array (IPTA; Hobbs et al 2010;) aiming at significantly enhanced sensitivities.…”
Section: Introductionmentioning
confidence: 99%