• DOI:10.1103/PhysRevD.101.082004
• Corpus ID: 204402702

Directed search for continuous gravitational-wave signals from the Galactic Center in the Advanced LIGO second observing run

@article{Piccinni2020DirectedSF,
  title={Directed search for continuous gravitational-wave signals from the Galactic Center in the Advanced LIGO second observing run},
  author={Ornella Juliana Piccinni and Pia Astone and Sabrina D’Antonio and Sergio Frasca and Giuseppe Intini and Iuri La Rosa and Paola Leaci and Simone Mastrogiovanni and A. L. Miller and Cristiano Palomba},
  journal={Physical Review D},
  year={2020}
}

• O. Piccinni, P. Astone, +7 authors C. Palomba
• Published 11 October 2019
• Physics
• Physical Review D

In this work we present the results of a search for continuous gravitational waves from the Galactic Center using LIGO O2 data. The search uses the Band-Sampled-Data directed search pipeline, which performs a semi-coherent wide-parameter-space search, exploiting the robustness of the FrequencyHough transform algorithm. The search targets signals emitted by isolated asymmetric spinning neutron stars, located within 25-150 parsecs from the Galactic Center. The frequencies covered in this search range between 10 and 710 Hz with a spin-down range from $-1.8\times10^{-9}$ to $3.7\times10^{-11}$ Hz/s. No continuous wave signal has been detected and upper limits on the gravitational wave amplitude are presented. The most stringent upper limit at $95\%$ confidence level, for the Livingston detector, is $\sim 1.4 \times 10^{-25}$ at frequencies near 160 Hz. To date, this is the most sensitive directed search for continuous gravitational-wave signals from the Galactic Center and the first search of this kind using the LIGO second observing run.