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On 2017 August 17 a binary neutron star coalescence candidate (later designated GW170817) with merger time 12:41:04 UTC was observed through gravitational waves by the Advanced LIGO and Advanced Virgo detectors. The Fermi Gamma-ray Burst…

High Energy Astrophysical Phenomena · Physics 2017-10-25 LIGO Scientific Collaboration , Virgo Collaboration , Fermi GBM , INTEGRAL , IceCube Collaboration , AstroSat Cadmium Zinc Telluride Imager Team , IPN Collaboration , The Insight-Hxmt Collaboration , ANTARES Collaboration , The Swift Collaboration , AGILE Team , The 1M2H Team , The Dark Energy Camera GW-EM Collaboration , the DES Collaboration , The DLT40 Collaboration , GRAWITA , : , GRAvitational Wave Inaf TeAm , The Fermi Large Area Telescope Collaboration , ATCA , : , Australia Telescope Compact Array , ASKAP , : , Australian SKA Pathfinder , Las Cumbres Observatory Group , OzGrav , DWF , AST3 , CAASTRO Collaborations , The VINROUGE Collaboration , MASTER Collaboration , J-GEM , GROWTH , JAGWAR , Caltech- NRAO , TTU-NRAO , NuSTAR Collaborations , Pan-STARRS , The MAXI Team , TZAC Consortium , KU Collaboration , Nordic Optical Telescope , ePESSTO , GROND , Texas Tech University , SALT Group , TOROS , : , Transient Robotic Observatory of the South Collaboration , The BOOTES Collaboration , MWA , : , Murchison Widefield Array , The CALET Collaboration , IKI-GW Follow-up Collaboration , H. E. S. S. Collaboration , LOFAR Collaboration , LWA , : , Long Wavelength Array , HAWC Collaboration , The Pierre Auger Collaboration , ALMA Collaboration , Euro VLBI Team , Pi of the Sky Collaboration , The Chandra Team at McGill University , DFN , : , Desert Fireball Network , ATLAS , High Time Resolution Universe Survey , RIMAS , RATIR , SKA South Africa/MeerKAT

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

Gravitational waves are now routinely detected from compact binary mergers, with binary neutron star mergers being of note for multi-messenger astronomy as they have been observed to produce electromagnetic counterparts. Novel search…

General Relativity and Quantum Cosmology · Physics 2025-01-22 Alistair McLeod , Damon Beveridge , Linqing Wen , Andreas Wicenec

The gravitational-wave (GW) events, produced by the coalescence of binary neutron-stars (BNS), can be treated as the standard sirens to probe the expansion history of the Universe, if their redshifts could be determined from the…

High Energy Astrophysical Phenomena · Physics 2021-08-04 Jiming Yu , Haoran Song , Shunke Ai , He Gao , Fayin Wang , Yu Wang , Youjun Lu , Wenjuan Fang , Wen Zhao

The advanced gravitational wave (GW) detector network has started {routine detection of } signals from merging compact binaries. Data indicate that in a fair fraction of these sources, at least one component was a neutron star, bringing…

High Energy Astrophysical Phenomena · Physics 2022-09-29 Akshat Singhal , Sourav Palit , Suman Bala , Gaurav Waratkar , Harsh Kumar , Varun Bhalerao

The postmerger gravitational-wave (GW) signal of a binary neutron star (BNS) merger is expected to contain valuable information that could shed light on the equation of state (EOS) of NSs, the properties of the matter produced during the…

High Energy Astrophysical Phenomena · Physics 2022-05-04 Aditya Vijaykumar , Shasvath J. Kapadia , Parameswaran Ajith

Third-generation (3G) gravitational-wave detectors will observe thousands of coalescing neutron star binaries with unprecedented fidelity. Extracting the highest precision science from these signals is expected to be challenging owing to…

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

We present here the latest development of a machine-learning pipeline for pre-merger alerts from gravitational waves coming from binary neutron stars. This work starts from the convolutional neural networks introduced in our previous paper…

General Relativity and Quantum Cosmology · Physics 2022-08-17 Grégory Baltus , Justin Janquart , Melissa Lopez , Harsh Narola , Jean-René Cudell

The joint detection of GW170817 and GRB 170817A opened the era of multi-messenger astronomy with gravitational waves (GWs) and provided the first direct probe that at least some binary neutron star (BNS) mergers are progenitors of short…

The observation of GW170817, the first binary neutron star merger observed in both gravitational waves (GW) and electromagnetic (EM) waves, kickstarted the age of multi-messenger GW astronomy. This new technique presents an observationally…

High Energy Astrophysical Phenomena · Physics 2023-11-20 Geoffrey Mo , Rahul Jayaraman , Danielle Frostig , Michael M. Fausnaugh , Erik Katsavounidis , George R. Ricker

The first direct observation of a binary neutron star (BNS) merger was a watershed moment in multi-messenger astronomy. However, gravitational waves from GW170817 have only been observed prior to the BNS merger, but electromagnetic…

General Relativity and Quantum Cosmology · Physics 2020-01-07 Jahed Abedi , Niayesh Afshordi

Gravitational waves (GWs) directly measure the luminosity distance to the merger, which, when combined with an independent measurement of the source's redshift, provides a novel probe of cosmology. The proposed next generation of…

Cosmology and Nongalactic Astrophysics · Physics 2021-08-11 Christine Ye , Maya Fishbach

In the dawn of the multi-messenger era including gravitational waves, which was marked by the first ever coincident detection of gravitational waves and electromagnetic radiation it is important to lay back and think about established…

High Energy Astrophysical Phenomena · Physics 2018-08-20 Antonios Nathanail

The discovery by Advanced LIGO/Virgo of gravitational waves from the binary neutron star (NS) merger GW170817, and subsequently by astronomers of transient counterparts across the electromagnetic (EM) spectrum, has initiated the era of…

High Energy Astrophysical Phenomena · Physics 2017-10-18 Brian D. Metzger

Motivated by the recent discovery of the binary neutron-star (BNS) merger GW170817, we determine the optimal observational setup for detecting and characterizing radio counterparts of nearby ($d_L\sim40$\,Mpc) BNS mergers. We simulate…

High Energy Astrophysical Phenomena · Physics 2018-11-28 Dario Carbone , Alessandra Corsi

On 17 August 2017, less than two years after the direct detection of gravitational radiation from the merger of two ~30 Msun black holes, a binary neutron star merger was identified as the source of a gravitational wave signal of ~100 s…

High Energy Astrophysical Phenomena · Physics 2021-01-12 Elena Pian

In 2017, the LIGO and Virgo gravitational wave (GW) detectors, in conjunction with electromagnetic (EM) astronomers, observed the first GW multi-messenger astrophysical event, the binary neutron star (BNS) merger GW170817. This marked the…

High Energy Astrophysical Phenomena · Physics 2023-11-20 Geoffrey Mo , Rahul Jayaraman , Michael Fausnaugh , Erik Katsavounidis , George R. Ricker , Roland Vanderspek

Binary neutron stars (BNSs) will spend $\simeq 10$ -- 15 minutes in the band of Advanced LIGO and Virgo detectors at design sensitivity. Matched-filtering of gravitational-wave (GW) data could in principle accumulate enough signal-to-noise…

Binary neutron star (BNS) post-merger gravitational-wave emission can occur in the aftermath of a BNS merger -- provided the system avoids prompt collapse to a black hole -- as a quasistable hypermassive remnant experiences quadrupolar…