Details
| Original language | English |
|---|---|
| Article number | 062005 |
| Journal | Physical Review D |
| Volume | 107 |
| Issue number | 6 |
| Publication status | Published - 17 Mar 2023 |
Abstract
Scorpius X-1 (Sco X-1) has long been considered one of the most promising targets for detecting continuous gravitational waves with ground-based detectors. Observational searches for Sco X-1 have achieved substantial sensitivity improvements in recent years, to the point of starting to rule out emission at the torque-balance limit in the low-frequency range ∼40-180 Hz. In order to further enhance the detection probability, however, there is still much ground to cover for the full range of plausible signal frequencies ∼20-1500 Hz, as well as a wider range of uncertainties in binary orbital parameters. Motivated by this challenge, we have developed binaryweave, a new search pipeline for continuous waves from a neutron star in a known binary system such as Sco X-1. This pipeline employs a semicoherent StackSlide F-statistic using efficient lattice-based metric template banks, which can cover wide ranges in frequency and unknown orbital parameters. We present a detailed timing model and extensive injection-and-recovery simulations that illustrate that the pipeline can achieve high detection sensitivities over a significant portion of the parameter space when assuming sufficiently large (but realistic) computing budgets. Our studies further underline the need for stricter constraints on the Sco X-1 orbital parameters from electromagnetic observations, in order to be able to push sensitivity below the torque-balance limit over the entire range of possible source parameters.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Nuclear and High Energy Physics
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In: Physical Review D, Vol. 107, No. 6, 062005, 17.03.2023.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Implementation of a new weave -based search pipeline for continuous gravitational waves from known binary systems
AU - Mukherjee, Arunava
AU - Prix, Reinhard
AU - Wette, Karl
N1 - Funding Information: A. M. acknowledges Stuart Anderson, James Clark, Duncan Macleod, Dan Moraru, Keith Riles, Peter Shawhan, and several other members of the computing and software team of the LIGO Scientific Collaboration (LSC). A. M. is thankful to Heinz-Bernd Eggenstein for learning some of the advanced computational skills. A. M. also acknowledges computational assistance by Henning Fehrmann and Carsten Aulbert. A. M. is thankful to Grant David Meadors and several other past and present members of the continuous-waves working group of the LSC regarding general discussion on detectability of CW signals from Sco X-1. We thank Pep Covas and Paola Leaci for helpful feedback on the manuscript. This work has utilized the LDAS computing clusters at the LIGO Hanford Observator (LHO) CalTech LIGO centre (CIT) and the ATLAS computing cluster at the MPI for Gravitational Physics Hannover. A. M. acknowledges support from the DST-SERB Start-up Research Grant No. SRG/2020/001290 for completion of this project. K. W. was supported by the Australian Research Council Centre of Excellence for Gravitational Wave Discovery (OzGrav) through Project No. CE170100004.
PY - 2023/3/17
Y1 - 2023/3/17
N2 - Scorpius X-1 (Sco X-1) has long been considered one of the most promising targets for detecting continuous gravitational waves with ground-based detectors. Observational searches for Sco X-1 have achieved substantial sensitivity improvements in recent years, to the point of starting to rule out emission at the torque-balance limit in the low-frequency range ∼40-180 Hz. In order to further enhance the detection probability, however, there is still much ground to cover for the full range of plausible signal frequencies ∼20-1500 Hz, as well as a wider range of uncertainties in binary orbital parameters. Motivated by this challenge, we have developed binaryweave, a new search pipeline for continuous waves from a neutron star in a known binary system such as Sco X-1. This pipeline employs a semicoherent StackSlide F-statistic using efficient lattice-based metric template banks, which can cover wide ranges in frequency and unknown orbital parameters. We present a detailed timing model and extensive injection-and-recovery simulations that illustrate that the pipeline can achieve high detection sensitivities over a significant portion of the parameter space when assuming sufficiently large (but realistic) computing budgets. Our studies further underline the need for stricter constraints on the Sco X-1 orbital parameters from electromagnetic observations, in order to be able to push sensitivity below the torque-balance limit over the entire range of possible source parameters.
AB - Scorpius X-1 (Sco X-1) has long been considered one of the most promising targets for detecting continuous gravitational waves with ground-based detectors. Observational searches for Sco X-1 have achieved substantial sensitivity improvements in recent years, to the point of starting to rule out emission at the torque-balance limit in the low-frequency range ∼40-180 Hz. In order to further enhance the detection probability, however, there is still much ground to cover for the full range of plausible signal frequencies ∼20-1500 Hz, as well as a wider range of uncertainties in binary orbital parameters. Motivated by this challenge, we have developed binaryweave, a new search pipeline for continuous waves from a neutron star in a known binary system such as Sco X-1. This pipeline employs a semicoherent StackSlide F-statistic using efficient lattice-based metric template banks, which can cover wide ranges in frequency and unknown orbital parameters. We present a detailed timing model and extensive injection-and-recovery simulations that illustrate that the pipeline can achieve high detection sensitivities over a significant portion of the parameter space when assuming sufficiently large (but realistic) computing budgets. Our studies further underline the need for stricter constraints on the Sco X-1 orbital parameters from electromagnetic observations, in order to be able to push sensitivity below the torque-balance limit over the entire range of possible source parameters.
UR - http://www.scopus.com/inward/record.url?scp=85151250564&partnerID=8YFLogxK
U2 - 10.48550/arXiv.2207.09326
DO - 10.48550/arXiv.2207.09326
M3 - Article
AN - SCOPUS:85151250564
VL - 107
JO - Physical Review D
JF - Physical Review D
SN - 2470-0010
IS - 6
M1 - 062005
ER -