IIA Institutional Repository

Browsing by Author "Kameswara Rao, N"

Browsing by Author "Kameswara Rao, N"

Sort by: Order: Results:

  • UBV Observations of R-Coronae Type Variables and Related Objects 
    Kameswara Rao, N (D. Reidel Publishing Co., 1980-07)
    UBV observations obtained during the period 1972-73 are presented for the following five R CrB stars: GU Sgr, SU Tau, XX CAm, DZ And, V973 Oph, and the hydrogen-poor, carbon-rich stars BD + 10 deg 2179 and HD 137613. ...
  • UBVR Polarimetry of the Peculiar R-Coronae Star V854-CENTAURI 
    Kameswara Rao, N; Raveendran, A. V (European Southern Observatory, 1993-07)
    We present UBVR polarimetry V 854 Cen obtained on four nights during February 1991-March 1992. Two sets of measurements are close to two nearby light maxima and the other two during the declines when the star was around 4 ...
  • Ultra Violet Imaging Telescope (UVIT) Science* 
    Kameswara Rao, N (Astronomical Society of India, 2003)
    Some of the significant areas of astronomy that would be persued by UVIT, one of the payloads on the proposed Indian multiwavelength astronomy satellite ASTROSAT, is described. Some of the considerations and uniqueness of ...
  • Ultraviolet observations of the hydrogen-deficient variable star MV Sagittarii 
    Kameswara Rao, N; Nandy, K (Indian Academy of Sciences, 1982)
    IUE observations of the hydrogen-deficient irregular variable star MV Sgr obtained in June-October 1980 and November 1979 are discussed. The observations reveal a prominent 2200 A absorption feature. A value of E(B - V) = ...
  • Ultraviolet variability of HD 62001 - The central star of the missing nebula V-V 1-7 
    Kameswara Rao, N; Gilra, D. P (Indian Academy of Sciences, 1983-03)
    IUE observations of HD 62001 do not confirm the ultraviolet variability of 0.15 mag seen from the ANS observations. These intriguing variations in ANS observations seem to be caused by a nearby (∼ 70 arcsec away) B star ...
  • Unveiling Vela – time variability of Na I D lines in the direction of the Vela supernova remnant 
    Kameswara Rao, N; Muneer, S; Lambert, D. L; Varghese, B. A (Oxford University Press on behalf of the Royal Astronomical Society, 2016-01-21)
    High-resolution spectral profiles of Na I D lines from the interstellar medium towards 64 stars in the direction of the Vela supernova remnant are presented. This survey conducted mostly between 2011 and 12 complements an ...
  • Unveiling Vela – variability of interstellar lines in the direction of the Vela supernova remnant – III. Na D and Ca II K 
    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 ...
  • Unveiling Vela: time variability of interstellar lines in the direction of the Vela supernova remnant – II. Na D and Ca II 
    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 ...
  • UOCS-IX. AstroSat/UVIT Study of the Open Cluster NGC 2818: Blue Stragglers, Yellow Stragglers, Planetary Nebula, and their Membership 
    Sharmila Rani; Pandey, G; Subramaniam, A; Kameswara Rao, N (American Astronomical Society, 2023-03-01)
    We present the first far-UV (FUV) imaging results of the intermediate-age Galactic open cluster NGC 2818 that has a planetary nebula (PN) within the field using images taken from the Ultra Violet Imaging Telescope ...
  • UV astronomy and stellar chromosphere 
    Kameswara Rao, N (Saha Institute of Nuclear Physics, 1995)
    "The abrupt termination of solar and stellar spectrum below A 2900 has been a great handicap to the advancement of our knowledge of the heavenly bodies ; because the ...
  • UV imaging telescope for the Indian Multiwavelength Astronomy Satellite 
    Pati, A. K; Kameswara Rao, N (SPIE-The International Society for Optical Engineering, 1998-08)
    The UV Imaging Telescope is a part of the proposed Indian Multiwavelength Astronomy Satellite mission. The initiate for an astronomy mission has ben taken by several institution in India, after the successful demonstration ...
  • The UV spectrum of the WC 11 star CPD -56 deg 8032 
    Kameswara Rao, N; Giridhar, S; Nandy, K (The European Southern Observatory, 1990-08)
    UV observations of the WC 11 central star of the compact planetary nebula CPD -56 deg 8032 show that the continuum flux is variable. This variability appears to be caused by a change in the circumstellar extinction properties. ...
  • UVIT–HST–GAIA view of NGC 288: a census of the hot stellar population and its properties from UV 
    Snehalata Sahu; Subramaniam, A; Cote, Patrick; Kameswara Rao, N; Stetson, Peter B (Oxford University Press on behalf of the Royal Astronomical Society, 2019-01)
    A complete census of the blue horizontal branch (BHB) and blue straggler star (BSS) population within a 10 radius from the centre of the globular cluster NGC 288 is presented, based on images from the Ultraviolet Imaging ...
  • A "variable" stellar object in a variable blue nebula V-V 1-7 
    Kameswara Rao, N; Gilra, D. P (The Observatory, 1981-08)
  • Variation of linear polarization in the R Aquarii system 
    Deshpande, M. R; Joshi, U. C; Kulshrestha, A. K; Sen, A. K; Kameswara Rao, N; Raveendran, A. V (Astronomical Society of the Pacific, 1987-01)
    Linear polarization measurements of the R Aqr system are reported here. The R Aqr system shows strong wavelength dependence of percent polarization and position angle, which are strongly time dependent also. There is a ...
  • VLA observations of extreme hydrogen deficient stars 
    Kameswara Rao, N; Venugopal, V. R; Patnaik, A (Indian Academy of Sciences, 1985-09)
    Observations at 2 and 6 cm have been obtained for six hydrogen-deficient stars R CrB, HD 160641, BD -9 deg 4395, V 348 Sgr, MV Sgr, and Upsilon Sgr by means of the National Radio Astronomy Observatory's Very Large Array ...
  • XX Cam -The Inactive R CrB Star 
    Kameswara Rao, N; Ashok, N. M; Kulkarni, P. V (Indian Academy of Sciences, 1980-09)
    Infrared observations obtained six years apart of the R CrB type star XX Cam do not show any infrared excess, unlike all other members of the class. The observed colours match a 7000 K black body energy distribution quite ...

Search DSpace

Browse

My Account