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This content will become publicly available on July 20, 2017

Title: Localization and broadband follow-up of the gravitational-wave transient GW150914

A gravitational-wave (GW) transient was identified in data recorded by the Advanced Laser Interferometer Gravitational-wave Observatory (LIGO) detectors on 2015 September 14. The event, initially designated G184098 and later given the name GW150914, is described in detail elsewhere. By prior arrangement, preliminary estimates of the time, significance, and sky location of the event were shared with 63 teams of observers covering radio, optical, near-infrared, X-ray, and gamma-ray wavelengths with ground- and space-based facilities. In this Letter we describe the low-latency analysis of the GW data and present the sky localization of the first observed compact binary merger. We summarize the follow-up observations reported by 25 teams via private Gamma-ray Coordinates Network circulars, giving an overview of the participating facilities, the GW sky localization coverage, the timeline and depth of the observations. As this event turned out to be a binary black hole merger, there is little expectation of a detectable electromagnetic (EM) signature. Nevertheless, this first broadband campaign to search for a counterpart of an Advanced LIGO source represents a milestone and highlights the broad capabilities of the transient astronomy community and the observing strategies that have been developed to pursue neutron star binary merger events. Furthermore, detailed investigations ofmore » the EM data and results of the EM follow-up campaign are being disseminated in papers by the individual teams.« less
  1. California Institute of Technology, Pasadena, CA (United States). et al.
Publication Date:
OSTI Identifier:
Report Number(s):
LIGO--P1500227; LIGO--P1500227-V11; FERMILAB-PUB--16-148-AE-E; LIGO--P1500227-V12; arXiv:1602.08492
Journal ID: ISSN 2041-8213; 1424769
Grant/Contract Number:
Accepted Manuscript
Journal Name:
The Astrophysical Journal. Letters
Additional Journal Information:
Journal Volume: 826; Journal Issue: 1; Journal ID: ISSN 2041-8213
Institute of Physics (IOP)
Research Org:
Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States); Brookhaven National Laboratory (BNL), Upton, NY (United States); Los Alamos National Laboratory (LANL), Los Alamos, NM (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States); Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Org:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Contributing Orgs:
LIGO Scientific; Virgo; ASKAP; BOOTES; DES; DEC; Fermi GBM; Fermi-LAT; GRAWITA; INTEGRAL; iPTF; InterPlanetary Network; J-GEM; La Silla-QUEST Survey; Liverpool Telescope; LOFAR; MASTER; MAXI; MWA; Pan-STARRS; PESSTO; Pi of the Sky; SkyMapper; Swift; C2PU; TOROS; VISTA
Country of Publication:
United States
79 ASTRONOMY AND ASTROPHYSICS gravitational waves; methods: observational