Enhancing gravitational-wave host localization with SKYFAST: rapid volume and inclination angle reconstruction
arXiv:2407.13695 · doi:10.1051/0004-6361/202451612
Abstract
The scientific impact of GW170817 strongly supports the need for an efficient electromagnetic follow-up campaign to gravitational-wave event candidates. The success of such campaigns depends critically on a fast and accurate localization of the source. In this paper, we present SKYFAST, a new pipeline for rapid localization of gravitational-wave event hosts. SKYFAST runs alongside a full parameter estimation (PE) algorithm, from which posterior samples are taken. It uses these samples to reconstruct an analytical posterior for the sky position, luminosity distance, and inclination angle using a Dirichlet Process Gaussian Mixture Model, a Bayesian non-parametric method. This approach allows us to provide an accurate localization of the event using only a fraction of the total samples produced by the full PE analysis. Depending on the PE algorithm employed, this can lead to significant time savings, which is crucial for identifying the electromagnetic counterpart. Additionally, in a few minutes, SKYFAST generates a ranked list of the most probable galaxy hosts from a galaxy catalog of choice. This list includes information on the inclination angle posterior conditioned to the position of each candidate host, which is useful for assessing the detectability of gamma-ray burst structured jet emissions.
10 pages, 9 figures
References in corpus (22)
- GW170817: Observation of Gravitational Waves from a Binary Neutron Star Inspiral
- Advanced Virgo: a 2nd generation interferometric gravitational wave detector
- Multi-messenger Observations of a Binary Neutron Star Merger
- Gravitational Waves and Gamma-rays from a Binary Neutron Star Merger: GW170817 and GRB 170817A
- An Ordinary Short Gamma-Ray Burst with Extraordinary Implications: Fermi-GBM Detection of GRB 170817A
- Swope Supernova Survey 2017a (SSS17a), the Optical Counterpart to a Gravitational Wave Source
- The Electromagnetic Counterpart of the Binary Neutron Star Merger LIGO/VIRGO GW170817. II. UV, Optical, and Near-IR Light Curves and Comparison to Kilonova Models
- Robust parameter estimation for compact binaries with ground-based gravitational-wave observations using the LALInference software library
- INTEGRAL Detection of the First Prompt Gamma-Ray Signal Coincident with the Gravitational Wave Event GW170817
- Optical emission from a kilonova following a gravitational-wave-detected neutron-star merger
- Swift and NuSTAR observations of GW170817: detection of a blue kilonova
- Candidate Electromagnetic Counterpart to the Binary Black Hole Merger Gravitational Wave Event S190521g
- GLADE+: An Extended Galaxy Catalogue for Multimessenger Searches with Advanced Gravitational-wave Detectors
- Optical Follow-up of Gravitational-wave Events with Las Cumbres Observatory
- Bilby-MCMC: An MCMC sampler for gravitational-wave inference
- Multi-messenger observations of binary neutron star mergers in the O4 run
- Machine Learning Gravitational Waves from Binary Black Hole Mergers
- Optimising gravitational waves follow-up using galaxies stellar mass
- Prospects for multi-messenger detection of binary neutron star mergers in the fourth LIGO-Virgo-KAGRA observing run
- Multi-messenger prospects for black hole - neutron star mergers in the O4 and O5 runs
- Web application for galaxy-targeted follow-up of electromagnetic counterparts to gravitational wave sources
- Rapid localization of gravitational wave hosts with FIGARO