REAL

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

Abbott, B. P. and Abbott, R. and Abbott, T. D. and Abraham, S. and Acernese, F. and Barta, Dániel and Dálya, Gergely and Frei, Zsolt and Gergely, Árpád László and Raffai, Péter and Vasúth, Mátyás Zsolt (2019) All-sky search for long-duration gravitational-wave transients in the second Advanced LIGO observing run. PHYSICAL REVIEW D, 99 (10). ISSN 2470-0010

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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 2-500 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. Signal families covered by these search algorithms 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 118.3 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(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(rss)(50%) = 2.7 x 10(-22) Hz(-1/2) for a millisecond magnetar model. For eccentric compact binary coalescence signals, the search sensitivity reaches h(rss)(50%) = 9.6 x 10(-22) Hz(-1/2).

Item Type: Article
Subjects: Q Science / természettudomány > Q1 Science (General) / természettudomány általában
SWORD Depositor: MTMT SWORD
Depositing User: MTMT SWORD
Date Deposited: 16 Feb 2023 12:35
Last Modified: 16 Feb 2023 12:35
URI: http://real.mtak.hu/id/eprint/159238

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