scholarly journals Timing of Binary Pulsars at Kalyazin, Russia

2004 ◽  
Vol 218 ◽  
pp. 433-434 ◽  
Author(s):  
Yu. P. Ilyasov ◽  
V. V. Oreshko ◽  
V. A. Potapov ◽  
A. E. Rodin
Keyword(s):  
Energy Density ◽  
Gravitational Wave ◽  
High Precision ◽  
Radio Telescope ◽  
Orbital Period ◽  
Binary Pulsar ◽  
Binary Pulsars ◽  
Upper Limits ◽  
Gravitational Wave Background

Regular high-precision timing of the binary pulsars J0613−0200, J1012+5307, J1022+1001, J1640+2224, J1643−1224, J1713+0747, J2145−0750 and the pulsar B1937+21 has been conducted at the Kalyazin (Russia) radio telescope RT-64 at 0.6 GHz over more than 6 years. Several of the pulsars monitored have been found to be good probes for gravitational wave background (GWB) tests, while others, having a shorter orbital period, can be used for establishing a dynamical binary pulsar timescale. Upper limits for the GWB energy density were estimated.

Stochastic Gravitational Wave Background: Upper Limits in the 10−6to 10−3Hz Band

2003 ◽  
Vol 599 (2) ◽  
pp. 806-813 ◽  
Author(s):  
J. W. Armstrong ◽  
L. Iess ◽  
P. Tortora ◽  
B. Bertotti
Keyword(s):  
Gravitational Wave ◽  
Upper Limits ◽  
Gravitational Wave Background

scholarly journals Upper limits on the isotropic gravitational-wave background from Advanced LIGO and Advanced Virgo’s third observing run

2021 ◽  
Vol 104 (2) ◽  
Author(s):  
R. Abbott ◽  
T. D. Abbott ◽  
S. Abraham ◽  
F. Acernese ◽  
K. Ackley ◽  
...  
Keyword(s):  
Gravitational Wave ◽  
Upper Limits ◽  
Gravitational Wave Background

scholarly journals The NANOGrav 12.5-year Data Set: Search for Non-Einsteinian Polarization Modes in the Gravitational-wave Background

2021 ◽  
Vol 923 (2) ◽  
pp. L22
Author(s):  
Zaven Arzoumanian ◽  
Paul T. Baker ◽  
Harsha Blumer ◽  
Bence Bécsy ◽  
Adam Brazier ◽  
...  
Keyword(s):  
Gravitational Wave ◽  
Signal To Noise Ratio ◽  
Simulated Data ◽  
Reference Frequency ◽  
Spatial Correlations ◽  
Signal To Noise ◽  
Data Set ◽  
Upper Limits ◽  
Theories Of Gravity ◽  
Gravitational Wave Background

Abstract We search NANOGrav’s 12.5 yr data set for evidence of a gravitational-wave background (GWB) with all the spatial correlations allowed by general metric theories of gravity. We find no substantial evidence in favor of the existence of such correlations in our data. We find that scalar-transverse (ST) correlations yield signal-to-noise ratios and Bayes factors that are higher than quadrupolar (tensor-transverse, TT) correlations. Specifically, we find ST correlations with a signal-to-noise ratio of 2.8 that are preferred over TT correlations (Hellings and Downs correlations) with Bayesian odds of about 20:1. However, the significance of ST correlations is reduced dramatically when we include modeling of the solar system ephemeris systematics and/or remove pulsar J0030+0451 entirely from consideration. Even taking the nominal signal-to-noise ratios at face value, analyses of simulated data sets show that such values are not extremely unlikely to be observed in cases where only the usual TT modes are present in the GWB. In the absence of a detection of any polarization mode of gravity, we place upper limits on their amplitudes for a spectral index of γ = 5 and a reference frequency of f yr = 1 yr−1. Among the upper limits for eight general families of metric theories of gravity, we find the values of A TT 95 % = ( 9.7 ± 0.4 ) × 10 − 16 and A ST 95 % = ( 1.4 ± 0.03 ) × 10 − 15 for the family of metric spacetime theories that contain both TT and ST modes.

scholarly journals Upper limits on a stochastic gravitational-wave background using LIGO and Virgo interferometers at 600–1000 Hz

2012 ◽  
Vol 85 (12) ◽  
Author(s):  
J. Abadie ◽  
B. P. Abbott ◽  
R. Abbott ◽  
T. D. Abbott ◽  
M. Abernathy ◽  
...  
Keyword(s):  
Gravitational Wave ◽  
Upper Limits ◽  
Gravitational Wave Background

scholarly journals Upper Limits on the Stochastic Gravitational-Wave Background from Advanced LIGO’s First Observing Run

2017 ◽  
Vol 118 (12) ◽  
Author(s):  
B. P. Abbott ◽  
R. Abbott ◽  
T. D. Abbott ◽  
M. R. Abernathy ◽  
F. Acernese ◽  
...  
Keyword(s):  
Gravitational Wave ◽  
Upper Limits ◽  
Gravitational Wave Background

Pulsar timing and the upper limits on a gravitational wave background: A Bayesian approach

1996 ◽  
Vol 54 (10) ◽  
pp. 5993-6000 ◽  
Author(s):  
M. P. McHugh ◽  
G. Zalamansky ◽  
F. Vernotte ◽  
E. Lantz
Keyword(s):  
Gravitational Wave ◽  
Bayesian Approach ◽  
Pulsar Timing ◽  
Upper Limits ◽  
Gravitational Wave Background
Sign in / Sign up

Export Citation Format

Share Document