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Browsing by Author "Gupta, R"

Browsing by Author "Gupta, R"

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  • Gulati, R. K; Gupta, R; Gothoskar, P; Khobragade, S (Astronomical Society of India, 1996)
    Scheme based on the artificial neural networks (ANNs) trained with multi-layer back propagation using single level network for classifying ultraviolet spectra in the IUE Low-Dispersion Spectra Reference Atlas is presented. ...
  • Gulati, R. K; Gupta, R; Kameswara Rao, N (European Southern Observatory, 1997-06)
    A library of synthetic spectra, based on Kurucz model atmospheres, has been used to compare the spectroscopic observations in the wavelength range 4850-5384 Å by using statistical and supervised artificial neural network ...
  • Shalima, P; Gogoi, R; Pathak, A; Misra, R; Gupta, R; Vaidya, D. B (The University of Chicago Press on behalf of the Astronomical Society of the Pacific, 2015-08)
    The Mid-IR colors (F8/F24) of galaxies together with their IR-UV luminosity correlations can be used to get some insight into the relative abundance of the different dust grain populations present in them. The ELAIS-N1 ...
  • Shalima, P; Murthy, J; Gupta, R (Terra Scientific Publishing Company, 2013-10-24)
    GALEX has detected ultraviolet halos extending as far as 5° around four bright stars (Murthy and Henry, 2011). These halos are produced by scattering of starlight by dust grains in thin foreground clouds that are not ...
  • Gupta, R; Burse, M; Das, H. K; Kohok, A; Ramaprakash, A. N; Engineer, S; Tandon, S. N (Astronomical Society of India, 2002-09)
    The various features of the IUCAA 2-meter telescope, its site parameters and considerations made for preserving the local seeing in terms of ventilation, thermal emissivity of the dome etc are described. The first ...
  • Ramaprakash, A. N; Gupta, R; Tandon, S. N (Astronomical Society of India, 1998)
  • Deep, A; Ramaprakash, A. N; Tandon, S. N; Gupta, R; Burse, M. P; Chordia, P. A; Das, H. K; Engineer, S; Kohok, A. A; Mestry, V. B (Astronomical Society of India, 2003)
    In the ASI 2002 meeting we presented a preliminary design of Near Infrared PICNIC Imager (Deep et al, 2002). In this paper we will show the progress that has been made since then.
  • Deep, A; Ramaprakash, A. N; Tandon, S. N; Gupta, R; Burse, M. P; Chordia, P. A; Das, H. K; Engineer, S; Kohok, A. A; Mestry, V. B (Astronomical Society of India, 2002-09)
    In this paper we present the current status of development of the Near Infrared PICNIC Imager (NIPI), which will be the first near-ffi instrument on IUCAA telescope. When used at one of the Cassegrain side ports of ...
  • Ranade, A; Gupta, R (Astronomical Society of India, 2004-12)
    This paper presents the H band near-infrared (NIR) spectral library of 135 solar type stars covering spectral types O5-M3 and luminosity classes I-V as per MK classification. The observations were carried out with 1.2 meter ...
  • Gupta, R; Ashok, N. M; Singh, H. P; Ranade, A. C (Astronomical Society of India, 2005-06)
    We present an H band near-infrared (NIR) spectral library of 135 solar type stars covering spectral types O5-M3 and luminosity classes I-V as per MK classification. The observations were carried out with 1.2 meter Gurushikhar ...
  • Srianand, R; Gupta, R; Kembhavi, A; Ramaprakash, A. N; Tandon, S. N (Astronomical Society of India, 2002-09)
    We present a brief overview of the proposed astronomical observations using the first light instrument !FOSC for the WCAA 2 m telescope.
  • Gupta, R (Astronomical Society of India, 1996)
    Over the past decade, Small Automated Telescopes have been developed at. various observatories. The operation of these telescopes and their related observations are carried out under the control of a computer and thus the ...
  • Gupta, R (Astronomical Society of India, 2001)
    In the past decade, with the inception of IUCAA and other similar efforts from Universities and Institutes, several MSc teaching courses at Universities now offer Astronomy & Astrophysics as a special paper along with a ...
  • Bora, A; Gupta, R; Singh, H. P; Murthy, J; Mohan, Rekhesh; Duorah, K (Blackwell Publishing, 2008-02)
    In order to develop a pipeline for automated classification of stars to be observed by the Tel-Aviv University Ultra-Violet Experiment (TAUVEX) ultraviolet space telescope, we employ an artificial neural network (ANN) ...
  • Kameswara Rao, N; Lambert, D. L; Reddy, A. B. S; Gupta, R; Muneer, S; Singh, H. P (Oxford University Press on behalf of the Royal Astronomical Society, 2020-03)
    High-resolution optical spectra were obtained in 2017–2019 with The Southern African Large Telescope of 15 stars in the direction of the Vela supernova remnant. Interstellar Ca II H & K and Na I D lines are discussed in ...
  • Kameswara Rao, N; Lambert, D. L; Reddy, A. B. S; Gupta, R; Muneer, S; Singh, H. P (IOP Publishing, 2017-05)
    In a survey conducted between 2011 and 2012 of interstellar Na I D line profiles in the direction of the Vela supernova remnant (SNR), a few lines of sight showed dramatic changes in low-velocity absorption components with ...

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