# All-sky search for long-duration gravitational-wave transients in the second Advanced LIGO observing run

The LIGO Scientific Collaboration, The Virgo Collaboration, D. Keitel, A. P. Lundgren, C. McIsaac, L. K. Nuttall, Ian Harry

Research output: Contribution to journalArticlepeer-review

59 Downloads (Pure)

## Abstract

We present the results of a search for long-duration gravitational-wave transients in the data from the Advanced LIGO second observation run; we search for gravitational-wave transients of $2~\text{--}~ 500$~s duration in the $24 - 2048$\,Hz frequency band with minimal assumptions about signal properties such as waveform morphologies, polarization, sky location or time of occurrence. Targeted signal models include fallback accretion onto neutron stars, broadband chirps from innermost stable circular orbit waves around rotating black holes, eccentric inspiral-merger-ringdown compact binary coalescence waveforms, and other models. The second observation run totals about \otwoduration~days of coincident data between November 2016 and August 2017. We find no significant events within the parameter space that we searched, apart from the already-reported binary neutron star merger GW170817. We thus report sensitivity limits on the root-sum-square strain amplitude $h_{\mathrm{rss}}$ at $50\%$ efficiency. These sensitivity estimates are an improvement relative to the first observing run and also done with an enlarged set of gravitational-wave transient waveforms. Overall, the best search sensitivity is $h_{\mathrm{rss}}^{50\%}$=$2.7\times10^{-22}$~$\mathrm{Hz^{-1/2}}$ for a millisecond magnetar model. For eccentric compact binary coalescence signals, the search sensitivity reaches $h_{\mathrm{rss}}^{50\%}$=$9.6\times10^{-22}$~$\mathrm{Hz^{-1/2}}$.
Original language English 104033 13 Physical Review D 99 10 14 May 2019 https://doi.org/10.1103/PhysRevD.99.104033 Published - 15 May 2019

• gr-qc
• RCUK
• STFC

## Fingerprint

Dive into the research topics of 'All-sky search for long-duration gravitational-wave transients in the second Advanced LIGO observing run'. Together they form a unique fingerprint.
• ### Data availability statement for 'All-sky search for long-duration gravitational-wave transients in the second Advanced LIGO observing run'.

Keitel, D. (Creator), Lundgren, A. (Creator), Mcisaac, C. (Creator), Nuttall, L. (Creator) & Harry, I. (Creator), American Physical Society, 14 May 2019

Dataset