188 citations · 648 across the 14 of their papers we have counts for
14 papers
Sequential nonparametric tests for a change in distribution: an application to detecting radiological anomalies
Oscar Hernan Madrid Padilla, Alex Athey, Alex Reinhart +1
We propose a sequential nonparametric test for detecting a change in distribution, based on windowed Kolmogorov--Smirnov statistics. The approach is simple, robust, highly computat…
Multiscale spatial density smoothing: an application to large-scale radiological survey and anomaly detection
Wesley Tansey, Alex Athey, Alex Reinhart +1
We consider the problem of estimating a spatially varying density function, motivated by problems that arise in large-scale radiological survey and anomaly detection. In this conte…
Detecting changes in maps of gamma spectra with Kolmogorov-Smirnov tests
Alex Reinhart, Valérie Ventura, Alex Athey
Various security, regulatory, and consequence management agencies are interested in continuously monitoring wide areas for unexpected changes in radioactivity. Existing detection s…
Spatially-Aware Temporal Anomaly Mapping of Gamma Spectra
Alex Reinhart, Alex Athey, Steven Biegalski
For security, environmental, and regulatory purposes it is useful to continuously monitor wide areas for unexpected changes in radioactivity. We report on a temporal anomaly detect…
Oxygen Metallicity Determinations from Optical Emission Lines in Early-type Galaxies
Alex E. Athey, Joel N. Bregman
We measured the oxygen abundances of the warm (T) phase of gas in seven early-type galaxies through long-slit observations. A template spectra was constructed from ga…
Elemental Abundances in the X-Ray Gas of Early-Type Galaxies with XMM and Chandra Observations
Jun Ji, Jimmy A. Irwin, Alex Athey +2
The source of hot gas in elliptical galaxies is thought to be due to stellar mass loss, with contributions from supernova events and possibly from infall from a surrounding environ…