The neutron star neutron star merger GW170817: A multi-messenger study

Giulia Gianfagna; Luigi Piro; Eleonora Troja; Hendrik Van Eerten; Geoffrey Ryan; Fulvio Ricci; Francesco Pannarale

doi:10.1017/S174392132200076X

The neutron star neutron star merger GW170817: A multi-messenger study

Giulia Gianfagna, Luigi Piro, Eleonora Troja, Hendrik Van Eerten, Geoffrey Ryan, Fulvio Ricci, Francesco Pannarale

Research output: Contribution to journal › Article › peer-review

Abstract

We join gravitational-wave and electromagnetic data to implement a combined simultaneous fit of the GW170817 event. The LIGO-Virgo analysis includes the estimation of the inclination, the angle of the binary with respect to the gravitationa-wave detector network line of sight. From the observations of the afterglow, instead, we can recover the viewing angle. The inclination and the viewing angle are supplementary angles, and can be treated as a single parameter. The value of the inclination that we recover from the fit is in agreement with the LIGO-Virgo previous works, with an uncertainty that is 10-fold smaller, thanks to contribution of the electromagnetic data. Moreover, with the inclusion of the gravitational-wave data, the degeneracy between the viewing angle and the jet opening angle is broken. This procedure is useful not only for analyzing GW170817, but any gravitational-wave event with an electromagnetic counterpart.

Original language	English
Pages (from-to)	211-215
Number of pages	5
Journal	Proceedings of the International Astronomical Union
Volume	16
DOIs	https://doi.org/10.1017/S174392132200076X
Publication status	Published - 14 Jun 2020

Bibliographical note

Publisher Copyright:
© The Author(s), 2023. Published by Cambridge University Press on behalf of International Astronomical Union.

Keywords

gamma rays: bursts
gravitational waves
methods: data analysis
stars: neutron

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

Access to Document

10.1017/S174392132200076X

Cite this

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title = "The neutron star neutron star merger GW170817: A multi-messenger study",

abstract = "We join gravitational-wave and electromagnetic data to implement a combined simultaneous fit of the GW170817 event. The LIGO-Virgo analysis includes the estimation of the inclination, the angle of the binary with respect to the gravitationa-wave detector network line of sight. From the observations of the afterglow, instead, we can recover the viewing angle. The inclination and the viewing angle are supplementary angles, and can be treated as a single parameter. The value of the inclination that we recover from the fit is in agreement with the LIGO-Virgo previous works, with an uncertainty that is 10-fold smaller, thanks to contribution of the electromagnetic data. Moreover, with the inclusion of the gravitational-wave data, the degeneracy between the viewing angle and the jet opening angle is broken. This procedure is useful not only for analyzing GW170817, but any gravitational-wave event with an electromagnetic counterpart.",

keywords = "gamma rays: bursts, gravitational waves, methods: data analysis, stars: neutron",

author = "Giulia Gianfagna and Luigi Piro and Eleonora Troja and {Van Eerten}, Hendrik and Geoffrey Ryan and Fulvio Ricci and Francesco Pannarale",

note = "Publisher Copyright: {\textcopyright} The Author(s), 2023. Published by Cambridge University Press on behalf of International Astronomical Union.",

year = "2020",

month = jun,

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doi = "10.1017/S174392132200076X",

language = "English",

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journal = "Proceedings of the International Astronomical Union",

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T2 - A multi-messenger study

AU - Gianfagna, Giulia

AU - Piro, Luigi

AU - Troja, Eleonora

AU - Van Eerten, Hendrik

AU - Ryan, Geoffrey

AU - Ricci, Fulvio

AU - Pannarale, Francesco

PY - 2020/6/14

Y1 - 2020/6/14

N2 - We join gravitational-wave and electromagnetic data to implement a combined simultaneous fit of the GW170817 event. The LIGO-Virgo analysis includes the estimation of the inclination, the angle of the binary with respect to the gravitationa-wave detector network line of sight. From the observations of the afterglow, instead, we can recover the viewing angle. The inclination and the viewing angle are supplementary angles, and can be treated as a single parameter. The value of the inclination that we recover from the fit is in agreement with the LIGO-Virgo previous works, with an uncertainty that is 10-fold smaller, thanks to contribution of the electromagnetic data. Moreover, with the inclusion of the gravitational-wave data, the degeneracy between the viewing angle and the jet opening angle is broken. This procedure is useful not only for analyzing GW170817, but any gravitational-wave event with an electromagnetic counterpart.

AB - We join gravitational-wave and electromagnetic data to implement a combined simultaneous fit of the GW170817 event. The LIGO-Virgo analysis includes the estimation of the inclination, the angle of the binary with respect to the gravitationa-wave detector network line of sight. From the observations of the afterglow, instead, we can recover the viewing angle. The inclination and the viewing angle are supplementary angles, and can be treated as a single parameter. The value of the inclination that we recover from the fit is in agreement with the LIGO-Virgo previous works, with an uncertainty that is 10-fold smaller, thanks to contribution of the electromagnetic data. Moreover, with the inclusion of the gravitational-wave data, the degeneracy between the viewing angle and the jet opening angle is broken. This procedure is useful not only for analyzing GW170817, but any gravitational-wave event with an electromagnetic counterpart.

KW - gamma rays: bursts

KW - gravitational waves

KW - methods: data analysis

KW - stars: neutron

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SP - 211

EP - 215

JO - Proceedings of the International Astronomical Union

JF - Proceedings of the International Astronomical Union

ER -

The neutron star neutron star merger GW170817: A multi-messenger study

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

Access to Document

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Astrophysics at the University of Bath 2023-2026

Cite this

The neutron star neutron star merger GW170817: A multi-messenger study

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Projects

Astrophysics at the University of Bath 2023-2026

Cite this