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Browsing by Author "Murthy, J"

Browsing by Author "Murthy, J"

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  • Ultra violet imaging telescope (UVIT) on ASTROSAT 
    Amit Kumar; Ghosh, S. K; Hutchings, J; Kamath, P. U; Kathiravan, S; Mahesh, P. K; Murthy, J; Nagbhushana, S; Pati, A. K; Rao, M. N; Rao, N. K; Sriram, S; Tandon, S. N (SPIE--The International Society for Optical Engineering, 2012-09)
    The Ultra Violet Imaging Telescope on ASTROSAT Satellite mission is a suite of Far Ultra Violet (FUV: 130 – 180 nm), Near Ultra Violet (NUV: 200 – 300 nm) and Visible band (VIS: 320–550nm) imagers. ASTROSAT is the ...
  • Ultraviolet astronomy with small space telescopes 
    Brosch, N; Gomez De Castro, Ana; Murthy, J; Ribak, E; Behar, E; Balabanov, V (Astronomical Institute of the Slovak Academy of Sciences, 2017-08)
    After describing the present situation with astronomy in the ultraviolet (UV), reviewing a few past and proposed future missions, we present options to develop space missions that have been realized for modest costs. In ...
  • An ultraviolet imager to study bright UV sources 
    Mathew, J; Prakash, A; Mayuresh, Sarpotdar; Sreejith, A. G; Safonova, M; Murthy, J (SPIE-The International Society for Optical Engineering, 2016-07)
    We have designed and developed a compact ultraviolet imaging payload to y on a range of possible platforms such as high altitude balloon experiments, cubesats, space missions, etc. The primary science goals are to study ...
  • Ultraviolet Imaging Telescope (UVIT) observation of the Galactic globular cluster NGC 7492 
    Kumar, R; Pradhan, A. C; Mohapatra, Abhisek; Moharana, Ayush; Ojha, D. K; Parthasarathy, M; Murthy, J (Oxford University Press on behalf of the Royal Astronomical Society, 2021-03)
    We present detailed photometric observations of the Galactic globular cluster NGC 7492 using the data obtained with two far-ultraviolet (FUV; 1300–1800 Å) and three near-ultraviolet (NUV; 2000–3000 Å) filters of Ultraviolet ...
  • Upper Limits on O VI Emission From Voyager Observations 
    Murthy, J; Henry, R. C; Shelton, R. L; Holberg, J. B (American Astronomical Society, 2001-08)
    We have examined 426 Voyager fields distributed across the sky for O VI λλ1032, 1038 emission from the Galactic diffuse interstellar medium. No such emission was detected in any of our observed fields. Our most constraining ...
  • Upper Limits on O VI Emission from Voyager Observations 
    Murthy, J (Indian Academy of Sciences, 2002-06)
    We have examined 426 Voyager fields distributed across the sky for O VI (1032/1038 Å) emission from the Galactic diffuse interstellar medium. No such emission was detected in any of our observed fields. Our most constraining ...
  • UV facilities for the investigation of the origin of life 
    de Castro, Ana I Gómez; Barstow, Martin A; Brosch, Noah; Coté, Patrick; France, Kevin; Heap, Sara; Hutchings, John; Koriski, S; Murthy, J; Neiner, Coralie; Roberge, Aki; Román-Duval, Julia; Rowe, Jason; Sachkov, Mikhail; Schkolnik, Evgenya; Shustov, Boris (Elsevier, 2021)
    This contribution summarizes the status and capabilities of current and future UV facilities for the investigation of the origin of life. The main operational project for UV astronomy is the Hubble Space Telescope with ...
  • UVIT observations of UV-Bright stars in four Galactic Globular Clusters 
    Kumar, R; Pradhan, A. C; Parthasarathy, M; Ojha, D. K; Mohapatra, A; Murthy, J (Cambridge University Press, 2019-05)
    We have performed photometric analysis of four Galactic globular clusters (GGCs): NGC 4147, NGC 4590, NGC 5053 and NGC 7492 using far-UV and near-UV filters of the Ultraviolet Imaging Telescope (UVIT) on-board AstroSat. ...
  • UVIT study of UV bright stars in the globular cluster NGC 4147 
    Ranjan Kumar; Pradhan, A. C; Parthasarathy, M; Ojha, D. K; Mohapatra, Abhisek; Murthy, J; Cassisi, Santi (Indian Academy of Sciences, 2021-10)
    We present far ultraviolet (FUV) observations of globular cluster NGC 4147 using three FUV filters, BaF2 (F154W), sapphire (F169M), and silica (F172M) of Ultra-Violet Imaging Telescope (UVIT) on-board the AstroSat satellite. ...
  • Voyager Observations of the Diffuse Far-ultraviolet Radiation Field 
    Murthy, J; Conn Henry, R; Holberg, Jay B (IOP Publishing, 2012-03)
    The two Voyager spacecraft have completed their planetary exploration mission and are now probing the outer realms of the heliosphere. The Voyager ultraviolet spectrometers continued to operate well after the Voyager 2 ...
  • Wavelength calibration of a tunable spatial heterodyne spectrometer 
    Nirmal, K; Sridharan, R; Sriram, S; Ambily, S; Mathew, J; Mayuresh, Sarpotdar; Murthy, J; Binukumar, G; Safonova, M (SPIE-The International Society for Optical Engineering, 2018-07-06)
    Spatial Heterodyne Spectroscopy (SHS) is a relatively novel interferometric technique similar to Fourier transform spectroscopy and shares design similarities with a Michelson Interferometer. An Imaging detector is used ...
  • Wide-field ultraviolet imager for astronomical transient studies 
    Mathew, J; Ambily, S; Prakash, A; Mayuresh, Sarpotdar; Nirmal, K; Sreejith, A. G; Safonova, M; Murthy, J; Brosch, N (Springer, 2018-04)
    Though the ultraviolet (UV) domain plays a vital role in the studies of astronomical transient events, the UV time-domain sky remains largely unexplored. We have designed a wide-field UV imager that can be flown on a range ...

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