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Most of compact binary systems are expected to circularize before the frequency of emitted gravitational waves (GWs) enters the sensitivity band of the ground based interferometric detectors. However, several mechanisms have been proposed…

A milestone of multi-messenger astronomy has been achieved with the detection of gravitational waves from a binary neutron star merger accompanied by observations of several associated electromagnetic counterparts. Joint observations can…

High Energy Astrophysical Phenomena · Physics 2018-02-28 Chris Pankow , Eve A. Chase , Scott Coughlin , Michael Zevin , Vassiliki Kalogera

We investigate the prospects of observing residual eccentricity in a population of compact binaries by calculating the power in the eccentric harmonics, following the methodology in arXiv:2411.04187. Although most observed compact binary…

High Energy Astrophysical Phenomena · Physics 2025-12-09 Mukesh Kumar Singh , Ben G. Patterson , Stephen Fairhurst

Orbital eccentricity in gravitational-wave signals from merging compact object binaries is a powerful indicator of their formation channel. Several binary black hole mergers and a neutron star--black hole merger have been reported to…

High Energy Astrophysical Phenomena · Physics 2026-05-19 Teagan A. Clarke , Isobel M. Romero-Shaw , Charlie Hoy , Jakob Stegmann , Paul D. Lasky , Eric Thrane

Accurate sky localization is essential for gravitational-wave (GW) astronomy, particularly for multimessenger follow-up and host galaxy identification. For strongly lensed GW events, achieving localization at the level of $\sim…

Instrumentation and Methods for Astrophysics · Physics 2026-04-21 Alvin K. Y. Li , Otto A. Hannuksela

The mergers of neutron star-neutron star and neutron star-black hole binaries are the most promising gravitational wave events with electromagnetic counterparts. The rapid detection, localization and simultaneous multi-messenger follow-up…

General Relativity and Quantum Cosmology · Physics 2023-12-07 Chayan Chatterjee , Manoj Kovalam , Linqing Wen , Damon Beveridge , Foivos Diakogiannis , Kevin Vinsen

Rapid sky localization of gravitational wave sources is crucial to enable prompt electromagnetic follow-ups. In this article, we present a novel semianalytical approach for sky localization of gravitational waves from compact binary…

General Relativity and Quantum Cosmology · Physics 2021-11-04 Qian Hu , Cong Zhou , Jhao-Hong Peng , Linqing Wen , Qi Chu , Manoj Kovalam

Gravitational waves (GW) from eccentric binaries have intricate signals encoding important features about the location, creation and evolution of the sources. Eccentricity shortens the merger time, making the emitted GW statistically…

General Relativity and Quantum Cosmology · Physics 2024-05-13 Dillon Buskirk , Maria C. Babiuc Hamilton

The inspirals and mergers of compact binaries are among the most promising events for ground-based gravitational-wave (GW) observatories. The detection of electromagnetic (EM) signals from these sources would provide complementary…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-28 Samaya M. Nissanke , Jonathan L. Sievers , Neal Dalal , Daniel E. Holz

We introduce an efficient and straightforward technique for rapidly detecting gravitational waves from compact binary mergers. We show that this method achieves the low latencies required to alert electromagnetic partners of candidate…

General Relativity and Quantum Cosmology · Physics 2018-08-08 Alexander H. Nitz , Tito Dal Canton , Derek Davis , Steven Reyes

One of the goals of gravitational-wave astronomy is simultaneous detection of gravitational-wave signals from merging compact-object binaries and the electromagnetic transients from these mergers. With the next generation of advanced…

There is significant benefit to be gained by pursuing multi-messenger astronomy with gravitational wave and electromagnetic observations. In order to undertake electromagnetic follow-ups of gravitational wave signals, it will be necessary…

General Relativity and Quantum Cosmology · Physics 2011-07-06 Stephen Fairhurst

The pre-merger (early-warning) gravitational-wave (GW) detection and localization of a compact binary merger would enable astronomers to capture potential electromagnetic (EM) emissions around the time of the merger, thus shedding light on…

High Energy Astrophysical Phenomena · Physics 2022-04-06 Mukesh Kumar Singh , Divyajyoti , Shasvath J. Kapadia , Md Arif Shaikh , Parameswaran Ajith

Multi-messenger astronomy is of great interest. The localization speed of gravitational wave sources is important for the success of electromagnetic follow-up. Although current gravitational wave source localization methods take up to a few…

High Energy Astrophysical Phenomena · Physics 2021-03-17 Takuya Tsutsui , Kipp Cannon , Leo Tsukada

Merging compact binaries are the most viable and best studied candidates for gravitational wave (GW) detection by the fully operational network of ground-based observatories. In anticipation of the first detections, the expected…

High Energy Astrophysical Phenomena · Physics 2015-05-20 Luke Zoltan Kelley , Enrico Ramirez-Ruiz , Marcel Zemp , Jürg Diemand , Ilya Mandel

Mergers of stellar-mass black holes on highly eccentric orbits are among the targets for ground-based gravitational-wave detectors, including LIGO, VIRGO, and KAGRA. These sources may commonly form through gravitational-wave emission in…

High Energy Astrophysical Phenomena · Physics 2018-03-21 László Gondán , Bence Kocsis , Péter Raffai , Zsolt Frei

We introduce an algorithm to marginalize the likelihood for a gravitational wave signal from a quasi-circular binary merger over its extrinsic parameters, accounting for the effects of higher harmonics and spin-induced precession. The…

General Relativity and Quantum Cosmology · Physics 2024-08-06 Javier Roulet , Jonathan Mushkin , Digvijay Wadekar , Tejaswi Venumadhav , Barak Zackay , Matias Zaldarriaga

Coalescing compact binaries have been pointed out as the most promising source of gravitational waves for kilometer-size interferometers such as LIGO. Gravitational wave signals are extracted from the noise in the detectors by matched…

General Relativity and Quantum Cosmology · Physics 2009-10-31 Karl Martel

A gravitational-wave (GW) early-warning of a compact-binary coalescence event, with a sufficiently tight localisation skymap, would allow telescopes to point in the direction of the potential electromagnetic counterpart before its onset.…

High Energy Astrophysical Phenomena · Physics 2021-02-25 Mukesh Kumar Singh , Shasvath J. Kapadia , Md Arif Shaikh , Deep Chatterjee , Parameswaran Ajith

While the expectation is that the majority of gravitational wave events observable by ground-based detectors will be emitted by compact binaries in quasi-circular orbits, the growing number of detections suggests the possibility of…

General Relativity and Quantum Cosmology · Physics 2020-12-02 Blake Moore , Nicolás Yunes