4 papers
Time delays and stationarity in quasar light curves
Namu Kroupa, David Yallup, Will Handley
We present a fully Bayesian framework for time delay inference and stationarity tests in quasar light curves using marginalised Gaussian processes. The model separates a determinis…
Global structure of the time delay likelihood
Namu Kroupa, Will Handley
We identify a fundamental pathology in the likelihood for time delay inference which challenges standard inference methods. By analysing the likelihood for time delay inference wit…
Nested Slice Sampling: Vectorized Nested Sampling for GPU-Accelerated Inference
David Yallup, Namu Kroupa, Will Handley
Model comparison and calibrated uncertainty quantification often require integrating over parameters, but scalable inference can be challenging for complex, multimodal targets. Nes…
Resonances in reflective Hamiltonian Monte Carlo
Namu Kroupa, Gábor Csányi, Will Handley
In high dimensions, reflective Hamiltonian Monte Carlo with inexact reflections exhibits slow mixing when the particle ensemble is initialised from a Dirac delta distribution and t…