My research interests are at the intersection of multi-messenger and time-domain astrophysics, cosmology, statistics, and data science. I works on wide-field surveys including LSST DESC (where I am Deputy Analysis Coordinator) and the Young Supernova Experiment (where I am one of the co-PIs). My research group works on developing machine learning methods for real-time detection and classification of variable and transient sources, Bayesian models for cosmological inference with type Ia supernovae, understanding the host galaxies of transients, looking for anomalous and unusual transient sources, spectroscopic studies of transients and their environments, and establishing an all-sky network of faint spectrophotometric standards for LSST, Roman and future projects. Within NCSA, I am the Deputy Director of the Center for Astrophysical Surveys – a team of scientists, engineers, and software developers building the computing infrastructure needed for massive wide-field surveys.
