Journal article

Calibration of the Advanced LIGO detectors for the discovery of the binary black-hole merger GW150914

BP Abbott, R Abbott, TD Abbott, MR Abernathy, K Ackley, C Adams, P Addesso, RX Adhikari, VB Adya, C Affeldt, N Aggarwal, OD Aguiar, A Ain, P Ajith, B Allen, PA Altin, DV Amariutei, SB Anderson, WG Anderson, K Arai Show all

PHYSICAL REVIEW D | AMER PHYSICAL SOC | Published : 2017

Abstract

In Advanced LIGO, detection and astrophysical source parameter estimation of the binary black hole merger GW150914 requires a calibrated estimate of the gravitational-wave strain sensed by the detectors. Producing an estimate from each detector's differential arm length control loop readout signals requires applying time domain filters, which are designed from a frequency domain model of the detector's gravitational-wave response. The gravitational-wave response model is determined by the detector's opto-mechanical response and the properties of its feedback control system. The measurements used to validate the model and characterize its uncertainty are derived primarily from a dedicated pho..

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