37 citations · 80 across the 10 of their papers we have counts for
4 papers · 1 filter
Robust mixtures in the presence of measurement errors
Jianyong Sun, Ata Kaban, Somak Raychaudhury
We develop a mixture-based approach to robust density modeling and outlier detection for experimental multivariate data that includes measurement error information. Our model is de…
On class visualisation for high dimensional data: Exploring scientific datasets
Ata Kaban, Jianyong Sun, Somak Raychaudhury +1
Parametric Embedding (PE) has recently been proposed as a general-purpose algorithm for class visualisation. It takes class posteriors produced by a mixture-based clustering algori…
Young stellar populations in early-type galaxies in the Sloan Digital Sky Survey
Louisa A. Nolan, Somak Raychaudhury, Ata Kaban
We use a purely data-driven rectified factor analysis to identify early-type galaxies with recent star formation in DR4 of the SDSS Spectroscopic Catalogue. We compare the spectra…
Finding Young Stellar Populations in Elliptical Galaxies from Independent Components of Optical Spectra
Ata Kaban, Louisa A. Nolan, Somak Raychaudhury
Elliptical galaxies are believed to consist of a single population of old stars formed together at an early epoch in the Universe, yet recent analyses of galaxy spectra seem to ind…