Home > Research > Publications & Outputs > Narrow-band search for gravitational waves from...

Electronic data

  • O2CWnarrowband

    Rights statement: © 2019 American Physical Society

    Accepted author manuscript, 1.43 MB, PDF document

    Available under license: CC BY-NC: Creative Commons Attribution-NonCommercial 4.0 International License

Links

Text available via DOI:

View graph of relations

Narrow-band search for gravitational waves from known pulsars using the second LIGO observing run

Research output: Contribution to journalJournal article

Published
  • LIGO Scientific Collaboration and Virgo Collaboration
Close
Article number122002
<mark>Journal publication date</mark>27/06/2019
<mark>Journal</mark>Physical Review D
Issue number12
Volume99
Number of pages20
Publication StatusPublished
<mark>Original language</mark>English

Abstract

Isolated spinning neutron stars, asymmetric with respect to their rotation axis, are expected to be sources of continuous gravitational waves. The most sensitive searches for these sources are based on accurate matched filtering techniques that assume the continuous wave to be phase locked with the pulsar beamed
emission. While matched filtering maximizes the search sensitivity, a significant signal-to-noise ratio loss will happen in the case of a mismatch between the assumed and the true signal phase evolution. Narrowband algorithms allow for a small mismatch in the frequency and spin-down values of the pulsar while
coherently integrating the entire dataset. In this paper, we describe a narrow-band search using LIGO O2 data for the continuous wave emission of 33 pulsars. No evidence of a continuous wave signal is found, and upper limits on the gravitational wave amplitude over the analyzed frequency and spin-down ranges
are computed for each of the targets. In this search, we surpass the spin-down limit, namely, the maximum rotational energy loss due to gravitational waves emission for some of the pulsars already present in the LIGO O1 narrow-band search, such as J1400 − 6325, J1813 − 1246, J1833 − 1034, J1952 þ 3252, and
for new targets such as J0940 − 5428 and J1747 − 2809. For J1400 − 6325, J1833 − 1034, and J1747 − 2809, this is the first time the spin-down limit is surpassed.

Bibliographic note

© 2019 American Physical Society