Welcome!

I am Hyungsuk Tak, an assistant professor in the Department of Statistics, Department of Astronomy and Astrophysics, and Institute for Computational and Data Science at Pennsylvania State University.

As an astro-statistician, I develop practically motivated data analytic tools to tackle statistical challenges in analyzing astronomical data. In particular, I am actively working on time delay cosmography to infer the current expansion rate of the Universe, called the Hubble constant, and deal with statistical challenges in modeling stochastic variability of irregularly-spaced time series data and developing Markov chain Monte Carlo methods to better explore multimodal parameter spaces. I am also interested in reverberation mapping lag estimation, measurement-error astronomy, and outlier-robust time series analysis.