Tanuka Chattopadhyay

TL;DR: In this article, two multivariate clustering techniques, the K-means partitioning method and the Dirichlet process of mixture modeling, have been applied to the BATSE gamma-ray burst (GRB) catalog, to obtain the optimum number of coherent groups.

TL;DR: In this article, a multivariate cluster and cladistic analysis of a sample of 56 low-redshift galaxy clusters containing 699 early-type galaxies, using four parameters: effective radius, velocity dispersion, surface brightness averaged over effective radius and Mg2 index, was performed.

TL;DR: In this article, an objective classification of the globular clusters (GCs) of NGC 5128 has been carried out by using a model-based approach of cluster analysis.

TL;DR: In this paper, a sample of 424 early-type galaxies described by 25 parameters, ten of which are Lick indices, was used to identify the most structuring parameters and determine an evolutionary classification of these objects, and four independent statistical methods were used to investigate the discriminant properties of the observables and the partitioning of the 424 galaxies.

TL;DR: In this paper, a sample of 424 early-type galaxies described by 25 parameters, ten of which are Lick indices, was used to identify the most structuring parameters and determine an evolutionary classification of these objects, and four independent statistical methods were used to investigate the discriminant properties of the observables and the partitioning of the 424 galaxies.