The GstLAL Search Analysis Methods for Compact Binary Mergers in Advanced LIGO's Second and Advanced Virgo's First Observing Runs

Sachdev, S.; Caudill, S.; Fong, H.; Lo, R. K. L.; Messick, C.; Mukherjee, D.; Magee, R. M.; Tsukada, L.; Blackburn, K.; Brady, P. R.; Brockill, P.; Cannon, K. C.; Chamberlin, S. J.; Chatterjee, Deep; Creighton, J. D. E.; Godwin, P.; Gupta, A.; Hanna, C.; Kapadia, S. J.; Lang, R. N.; Li, Tjonnie G. F.; Meacher, D.; Pace, A. E.; Privitera, S.; Sadeghian, L.; Wade, L. E.; Wade, M.; Weinstein, A. J.; Xiao, S.

doi:10.48550/arxiv.1901.08580

Cited by 127 publications

(205 citation statements)

References 56 publications

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“…Here we record the complete list of significant events recovered by the combined IMBH search from O3a data in Table 2, and supply corresponding search results from GWTC-2 for comparison. Specifically, we show outputs from the PyCBC broad parameter space and focused BBH searches (Nitz et al 2019) and the GstLAL broad parameter space search (Sachdev et al 2019). For GW190521, the PyCBC IMBH search yields a FAR of 1.4 × 10 −3 yr −1 , as compared to 1.1 yr −1 for the broad parameter space analysis of Abbott et al (2020b,c).…”

Section: Complete O3a Search Results Including Bbhmentioning

confidence: 99%

“…The search for IMBH mergers executed by the matched filter based GstLAL pipeline (Messick et al 2017;Hanna et al 2020;Sachdev et al 2019) uses a template bank covering a parameter space of binaries with (redshifted) total masses in the range [50, 600] M . The mass ratios, q = m 2 /m 1 , of the binary systems covered lie between 1 and 1/10, while their spins are either aligned or anti-aligned with the total angular momentum of the system, with the dimensionless spin magnitude less than 0.98.…”

Section: Gstlal Searchmentioning

confidence: 99%

“…This has been computed for both single-detector and multi-detector triggers found by the search. The non-coincident and noise-like triggers are then used to estimate the background noise probability density, which is sampled to find the estimated FAR, corresponding to the likelihood ratio for a candidate (Messick et al 2017;Sachdev et al 2019).…”

Section: Gstlal Searchmentioning

confidence: 99%

“…Improvement in the detector sensitivity at low frequencies in the advanced era made IMBH binaries a target for a matched filtering search that would probe the short inspiral phase. In Abbott et al (2017b), we used a combined search with the matched filtering GstLAL (Messick et al 2017;Hanna et al 2020;Sachdev et al 2019) search and model independent cWB (Klimenko et al 2011(Klimenko et al , 2016. This combined search was further extended with an additional matched filtering PyCBC search (Usman et al 2016;Allen 2005;Dal Canton et al 2014;Nitz et al 2017) in Abbott et al (2019 using the data from the first two observing runs.…”

Section: Introductionmentioning

confidence: 99%

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Search for intermediate mass black hole binaries in the third observing run of Advanced LIGO and Advanced Virgo

2021

Preprint

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Intermediate-mass black holes (IMBHs) span the approximate mass range 100-10 5 M , between black holes (BHs) formed by stellar collapse and the supermassive BHs at the centers of galaxies. Mergers of IMBH binaries are the most energetic gravitational-wave sources accessible by the terrestrial detector network. Searches of the first two observing runs of Advanced LIGO and Advanced Virgo did not yield any significant IMBH binary signals. In the third observing run (O3), the increased network sensitivity enabled the detection of GW190521, a signal consistent with a binary merger of mass ∼ 150 M providing direct evidence of IMBH formation.Here we report on a dedicated search of O3 data for further IMBH binary mergers, combining both modelled (matched filter) and model independent search methods. We find some marginal candidates, but none are sufficiently significant to indicate detection of further IMBH mergers. We quantify the sensitivity of the individual search methods and of the combined search using a suite of IMBH binary signals obtained via numerical relativity, including the effects of spins misaligned with the binary orbital axis, and present the resulting upper limits on astrophysical merger rates. Our most stringent limit is for equal mass and aligned spin BH binary of total mass 200M and effective aligned spin 0.8 at 0.056 Gpc −3 yr −1 (90% confidence), a factor of 3.5 more constraining than previous LIGO-Virgo limits. We also update the estimated rate of mergers similar to GW190521 to 0.08 Gpc −3 yr −1 .

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Section: Complete O3a Search Results Including Bbhmentioning

confidence: 99%

Section: Gstlal Searchmentioning

confidence: 99%

Section: Gstlal Searchmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Search for intermediate mass black hole binaries in the third observing run of Advanced LIGO and Advanced Virgo

2021

Preprint

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“…Dynamical interactions can form binary neutron stars with eccentricity that is measurable, although the predicted rate of these mergers detectable by current gravitational-wave observatories is small [18,19]. The two binary neutron star mergers observed by Advanced LIGO and Virgo [20,21] were both detected with searches that use circular waveform templates [22][23][24][25][26][27][28][29][30]. Constraints have been placed on the eccentricity of these binaries.…”

Section: Introductionmentioning

confidence: 99%

Eccentric Binary Neutron Star Search Prospects for Cosmic Explorer

Lenon,

Brown,

Nitz

2021

Preprint

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We determine the ability of Cosmic Explorer, a proposed third-generation gravitational-wave observatory, to detect eccentric binary neutron stars and to measure their eccentricity. We find that for a matched-filter search, template banks constructed using binaries in quasi-circular orbits are effectual for eccentric neutron star binaries with e7 ≤ 0.004 (e7 ≤ 0.003) for CE1 (CE2), where e7 is the binary's eccentricity at a gravitational-wave frequency of 7 Hz. We show that stochastic template placement can be used to construct a matched-filter search for binaries with larger eccentricities and construct an effectual template bank for binaries with e7 ≤ 0.05. We show that the computational cost of both the search for binaries in quasi-circular orbits and eccentric orbits is not significantly larger for Cosmic Explorer than for Advanced LIGO and is accessible with present-day computational resources. We investigate Cosmic Explorer's ability to distinguish between circular and eccentric binaries. We estimate that for a binary with a signal-to-noise ratio of 8 (800), Cosmic Explorer can distinguish between a circular binary and a binary with eccentricity e7 10 −2 (10 −3 ) at 90% confidence.

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The LIGO‐Virgo O3 Run and the Multi‐Messenger Investigations of Compact Binary Mergers

Poggiani

2023

Annalen der Physik

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The third observing run (O3) of Advanced LIGO and Advanced Virgo started in April 2019 and ended in March 2020 due to the pandemic. From the O3 run three catalogs of compact binary mergers, GWTC‐2, GWTC‐2.1, and GWTC‐3, that include also some exceptional events, are produced by the LIGO/Virgo Collaboration. The paper will review the science results about compact binary mergers during the O3 run and the follow‐up of gravitational wave candidate events involving the whole electromagnetic spectrum and neutrinos. No confirmed counterpart is found during the O3 run for any candidate. The impact of detected events on astrophysics and cosmology will also be discussed. The paper will also briefly summarize additional multi‐messenger investigations involving candidates not initially associated to gravitational events.

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The GstLAL Search Analysis Methods for Compact Binary Mergers in Advanced LIGO's Second and Advanced Virgo's First Observing Runs

Cited by 127 publications

References 56 publications

Search for intermediate mass black hole binaries in the third observing run of Advanced LIGO and Advanced Virgo

Search for intermediate mass black hole binaries in the third observing run of Advanced LIGO and Advanced Virgo

Eccentric Binary Neutron Star Search Prospects for Cosmic Explorer

The LIGO‐Virgo O3 Run and the Multi‐Messenger Investigations of Compact Binary Mergers

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