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Browsing by Author "Sujatha, N. V"

Browsing by Author "Sujatha, N. V"

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  • Diffuse radiation from the Aquila Rift 
    Jyothy, S. N; Murthy, J; Karuppath, N; Sujatha, N. V (Oxford University Press on behalf of the Royal Astronomical Society, 2015-12-01)
    We present an analysis of the diffuse ultraviolet (UV) background in a low latitude region near the Aquila Rift based on observations made by the Galaxy Evolution Explorer (GALEX). The UV background is at a level of about ...
  • Dust Properties in the Far-Ultraviolet in Ophiuchus 
    Sujatha, N. V; Shalima, P; Murthy, J; Henry, R. C (The American Astronomical Society, 2005-11)
    We have derived the albedo (a) and phase function asymmetry factor (g) of interstellar dust grains at 1100 Å using archival Voyager observations of diffuse radiation in Ophiuchus. We have found that the grains are highly ...
  • Extragalactic survey of UV Galaxies using GALEX 
    Bose, L. S; Narayanankutty, K; Sujatha, N. V; Murthy, J (International Organization Of Scientific Research (IOSR), 2014-05)
    We report here the results of the study of extragalactic radiation using number counts of galaxies at high galactic latitudes. For this study nine GALEX DIS targets around ELAISN1 in the North Pole. The overlapped regions ...
  • Extragalactic survey using GALEX–spitzer matching fields 
    Bose, L. S; Sujatha, N. V; Narayanankutty, K; Murthy, J (Pleiades Publishing, 2015-12)
    We have used Spitzer observations of galaxies in the ELAIS-N1 region centered at 16h10m01s, +54◦30′36″ to extend the effective sensitivity of GALEX UV observations of the same region. Spitzer is more sensitive to external ...
  • Far-ultraviolet scattering by dust in Orion 
    Shalima, P; Sujatha, N. V; Murthy, J; Henry, R. C; Sahnow, D. J (Blackwell Publishing, 2006-04)
    We have modelled diffuse far-ultraviolet (FUV) spectrum observed by the Far Ultraviolet Spectroscopic Explorer (FUSE) near M42 as the scattering of the starlight from the Trapezium stars by dust in front of the nebula. The ...
  • GALEX Observations of Diffuse Ultraviolet Emission from Draco 
    Sujatha, N. V; Murthy, J; Suresh, R; Henr, R. C; Bianchi, L (IOP Publishing, 2010-11-10)
    We have studied small-scale (2') spatial variation of the diffuse ultraviolet (UV) radiation using a set of 11 Galaxy Evolution Explorer deep observations in the constellation of Draco. We find a good correlation between ...
  • GALEX observations of diffuse UV radiation at high spatial resolution from the Sandage Nebulosity 
    Sujatha, N. V; Murthy, J; Karnataki, A; Henry, R. C; Bianchi, L (The American Astronomical Society, 2009-02)
    We have observed a region of nebulosity first identified as starlight scattered by interstellar dust by Sandage using the Galaxy Evolution Explorer (GALEX) ultraviolet imaging telescope. Apart from airglow and zodiacal ...
  • Interstellar dust studies with TAUVEX 
    Maheswar, G; Muthu, C; Sujatha, N. V; Pandey, G; Bhatt, H. C; Kameswara Rao, N; Murthy, J (Astronomical Society of India, 2007-06)
    We propose to carry out studies on the properties of inter- stellar dust using TAUVEX. Through the multi-band TAUVEX observations, particularly with the use of filters optimized for extinction observations of the 2175 ° ...
  • Mapping the Diffuse Ultraviolet Sky with the Galaxy Evolution Explorer 
    Murthy, J; Henry, R. C; Sujatha, N. V (IOP Publishing, 2010-12)
    We present a map of the diffuse ultraviolet cosmic background in two wavelength bands (FUV: 1530 Å and NUV: 2310 Å) over almost 75% of the sky using archival data from the Galaxy Evolution Explorer (GALEX) mission. Most ...
  • Measurement of Dust Optical Properties in Coalsack Nebula 
    Sujatha, N. V; Murthy, J; Shalima, P (University of Chicago Press, 2007-08)
    We have used FUSE and Voyager observations of dust-scattered starlight in the neighborhood of the Coalsack Nebula to derive the optical constants of the dust grains. The albedo is consistent with a value of 0.28 ± 0.04, ...
  • A model of the stellar radiation field in the UV 
    Sujatha, N. V; Chakraborty, P; Murthy, J; Henry, R. C (Astronomical Society of India, 2004-09)
    This work is the first step in a systematic effort to understand and predict the different components of the UV (912 A - 3000 A) radiation field over the entire sky. We have developed a model to predict the ISRF in the UV ...
  • Studies of diffuse UV radiation 
    Sujatha, N. V; Murthy, J (Astronomical Society of India, 2007-06)
    The upcoming TAUVEX mission is expected to provide us with high quality data from observations over large parts of the sky in different wavelength bands. We propose to use this data for the study of diffuse radiation field ...
  • Survey of O VI absorption in the Large Magellanic Cloud 
    Pathak, A; Pradhan, A. C; Sujatha, N. V; Murthy, J (Wiley-Blackwell, 2011-04)
    We present a survey of interstellar O VI absorption in the Large Magellanic Cloud (LMC) towards 70 lines of sight based on Far Ultraviolet Spectroscopic Explorer (FUSE) observations. The survey covers O VI absorption in a ...

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