Open AccessPrompt and accurate sky localization of gravitational-wave sources
Author(s) -
S. Morisaki,
V. Raymond
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1468/1/012219
Subject(s) - sky , ligo , software , gravitational wave , computer science , neutron star , binary number , signal (programming language) , event (particle physics) , estimation theory , physics , astronomy , algorithm , astrophysics , mathematics , operating system , programming language , arithmetic
Accurate, precise and prompt sky localization of gravitational-wave sources is essential to the success of multi-messenger astronomy. One of the most accurate sky localizations we can obtain is from full signal parameter estimation obtained with the LIGO-Virgo LALInference software, done after a quick initial sky localization with the Bayestar software. While more accurate, the improved analysis can take on the order of months to complete for a binary neutron star event. To solve this issue, we develop a new technique to speed up the parameter estimation. Our technique speeds up the parameter estimation by a factor of O (10 4 ) and enables updating the sky localization within 10 minutes after the detection.