609 citations · 1.3k across the 33 of their papers we have counts for
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Automated Classification of Sloan Digital Sky Survey (SDSS) Stellar Spectra using Artificial Neural Networks
Mahdi Bazarghan, Ranjan Gupta
Automated techniques have been developed to automate the process of classification of objects or their analysis. The large datasets provided by upcoming spectroscopic surveys with…
A 3D Automated Classification Scheme for the TAUVEX data pipeline
Archana Bora, Ranjan Gupta, Harinder P. Singh +3
In order to develop a pipeline for automated classification of stars to be observed by the TAUVEX ultraviolet space Telescope, we employ an artificial neural network (ANN) techniqu…
A Near-Infrared Stellar Spectral Library: III. J-Band Spectra
Arvind C. Ranade, N. M. Ashok, Harinder P. Singh +1
This paper is the third in the series of papers published on near-infrared (NIR) stellar spectral library by Ranade et al. (2004 & 2007). The observations were carried out with 1.2…
A Near-Infrared Stellar Spectral Library: II. K-Band Spectra
Arvind C. Ranade, Harinder P. Singh, Ranjan Gupta +1
This paper is the second in the series of papers on near-infrared (NIR) stellar spectral library produced by reducing the observations carried out with 1.2 meter Gurushikhar Infrar…
Composite Interstellar Grains
D. B. Vaidya, Ranjan Gupta, T. P. Snow
The composite grain is made up of a host silicate spheroid and graphite inclusions. The extinction efficiencies of the composite spheroidal grains for three axial ratios are comput…
Reliability checks on the Indo-US Stellar Spectral Library using Artificial Neural Networks and Principal Component Analysis
Harinder P. Singh, Manabu Yuasa, Nawo Yamamoto +1
The Indo-US coudé feed stellar spectral library (CFLIB) made available to the astronomical community recently by Valdes et al. (2004) contains spectra of 1273 stars in the spectral…
Interstellar Extinction by Spheroidal Dust Grains
Ranjan Gupta, Tadashi Mukai, D. B. Vaidya +2
Observations of interstellar extinction and polarization indicate that the interstellar medium consists of aligned non-spherical dust grains which show variation in the interstella…
Scattering properties and composition of cometary dust
Ranjan Gupta, D. B. Vaidya, J. S. Dobbie +1
Composition of Comet dust obtained by the dust impact analyser on the Halley probes indicated that the comet dust is a mixure of silicate and carbonaceous material. The collected i…
Automated Classification of 2000 Bright IRAS Sources
Ranjan Gupta, Harinder P. Singh, K. Volk +1
An Artificial Neural Network (ANN) has been employed using a supervised back-propagation scheme to classify 2000 bright sources from the Calgary database of IRAS (Infrared Astronom…
The Indo-U.S. Library of Coude Feed Stellar Spectra
Francisco Valdes, Ranjan Gupta, James A. Rose +2
We have obtained spectra for 1273 stars using the 0.9m Coudé Feed telescope at Kitt Peak National Observatory. This telescope feeds the coudé spectrograph of the 2.1m telescope. Th…