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Title: LOCALIZATION OF SHORT DURATION GRAVITATIONAL-WAVE TRANSIENTS WITH THE EARLY ADVANCED LIGO AND VIRGO DETECTORS

The Laser Interferometer Gravitational wave Observatory (LIGO) and Virgo advanced ground-based gravitational-wave detectors will begin collecting science data in 2015. With first detections expected to follow, it is important to quantify how well generic gravitational-wave transients can be localized on the sky. This is crucial for correctly identifying electromagnetic counterparts as well as understanding gravitational-wave physics and source populations. We present a study of sky localization capabilities for two search and parameter estimation algorithms: coherent WaveBurst, a constrained likelihood algorithm operating in close to real-time, and LALInferenceBurst, a Markov chain Monte Carlo parameter estimation algorithm developed to recover generic transient signals with latency of a few hours. Furthermore, we focus on the first few years of the advanced detector era, when we expect to only have two (2015) and later three (2016) operational detectors, all below design sensitivity. These detector configurations can produce significantly different sky localizations, which we quantify in detail. We observe a clear improvement in localization of the average detected signal when progressing from two-detector to three-detector networks, as expected. Although localization depends on the waveform morphology, approximately 50% of detected signals would be imaged after observing 100-200 deg{sup 2} in 2015 and 60-110 deg{sup 2} inmore » 2016, although knowledge of the waveform can reduce this to as little as 22┬ádeg{sup 2}. This is the first comprehensive study on sky localization capabilities for generic transients of the early network of advanced LIGO and Virgo detectors, including the early LIGO-only two-detector configuration.« less
Authors:
; ;  [1] ;  [2] ;  [3]
  1. MIT LIGO Laboratory, 185 Albany Street, Cambridge, MA 02139 (United States)
  2. INFN Padova, Via Marzolo 8, Padova I-35131 (Italy)
  3. University of Florida, P.O. Box 118440, Gainesville, FL 32611-8440 (United States)
Publication Date:
OSTI Identifier:
22364177
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal; Journal Volume: 800; Journal Issue: 2; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ALGORITHMS; APPROXIMATIONS; ASTROPHYSICS; COSMOLOGY; DATA ANALYSIS; DETECTION; GRAVITATIONAL WAVE DETECTORS; GRAVITATIONAL WAVES; IMAGES; INTERFEROMETERS; LASERS; MARKOV PROCESS; MONTE CARLO METHOD; MORPHOLOGY; SENSITIVITY; TRANSIENTS; WAVE FORMS