BibTeX

@article{2305.18528v2,
Author        = {Marco Crisostomi and Kallol Dey and Enrico Barausse and Roberto Trotta},
Title         = {Neural Posterior Estimation with guaranteed exact coverage: the ringdown
  of GW150914},
Eprint        = {2305.18528v2},
DOI           = {10.1103/PhysRevD.108.044029},
ArchivePrefix = {arXiv},
PrimaryClass  = {gr-qc},
Abstract      = {We analyze the ringdown phase of the first detected black-hole merger,
GW150914, using a simulation-based inference pipeline based on masked
autoregressive flows. We obtain approximate marginal posterior distributions
for the ringdown parameters, namely the mass, spin, and the amplitude and
phases of the dominant mode and its first overtone. Thanks to the locally
amortized nature of our method, we are able to calibrate our posteriors with
injected simulations, producing posterior regions with guaranteed (i.e. exact)
frequentist coverage of the true values. For GW150914, our calibrated
posteriors provide only mild evidence (~ 2 sigma) for the presence of an
overtone, even if the ringdown is assumed to start at the peak of the
amplitude.},
Year          = {2023},
Month         = {May},
Note          = {Phys. Rev. D 108, 044029 (2023)},
Url           = {http://arxiv.org/abs/2305.18528v2},
File          = {2305.18528v2.pdf}
}