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Browsing Publications of Astronomical Society of India by Title

Browsing Publications of Astronomical Society of India by Title

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  • Discovery of a new NLQSO: RX J1334.2+3759 
    Dewangan, G. C; Singh, K. P; Jones, L. R; McHardy, I. M; Newsam, A. M; Mason, K. O (Astronomical Society of India, 2001)
    A new narrow-line QSO, RX J1334.2+3759, has been identified at a redshift of 0.3858. The QSO has intrinsic soft X-ray luminosity ~ 2.8 x 1044 erg s-1. Soft X-ray emission from the QSO is highly variable. Rapid variability ...
  • Discovery of a New Satellite of Uranus 
    Bhattacharyya, J. C; Kuppuswamy, K (Astronomical Society of India, 1977-03)
  • Discovery of a planetary system around 51 Pegasus 
    Sagar, R (Astronomical Society of India, 1996)
  • Discovery of pulsations in HD 98851 
    Joshi, S; Girish, V; Martinez, P; Sagar, R; Ashoka, B. N; Gupta, S. K; Seetha, S; Chaubey, U. S; Kurtz, D. W (Astronomical Society of India, 2001)
    Using the UPSO 1-m Sampurnanand reflector telescope equipped with a fast photometer, we observed the chemically peculiar (CP) star HD 98851 for a total of around 30 hours on 5 different nights between January to April 2000. ...
  • Discovery potential of small/medium-size optical telescopes : A study of publication patterns in NATURE (1993-95) 
    Gopal Krishna; Barve, S (Astronomical Society of India, 1998)
  • Disruption of forced current sheets in astrophysical plasmas 
    Lakhina, G. S (Astronomical Society of India, 1993)
    Ion tearing mode instability of the forced current sheets is studied. The trapped electrons have a strong stabilizing effect on the excitation of the instability. The presence of background turbulence can effectively lead ...
  • Dissipative Collapse of a Spherical Cluster of Gas Clouds 
    Indulekha, K; Vijayagovindan, G. V; Ramadurai, S (Astronomical Society of India, 2003)
    We investigate the time scale for the dissipative collapse of a spherical cluster of gas clouds by supplementing the scalar virial equation with an evolution equation for the energy. We find that collapse times are more ...
  • Distance Indicators in Radio Astronomy 
    Swarup, G (Astronomical Society of India, 1975-06)
  • Distance to the Virgo cluster and estimation of the Hubble Constant 
    Mazumdar, A; Narasimha, D (Astronomical Society of India, 1999)
  • The distinctive features of Rik-Jyotisha 
    Holay, P. V (Astronomical Society of India, 1998-03)
    There are six appendices to the veda, which include grammar, Glossary, of words etc. jyotisha is one of those appendices. It mainly states the positions of the sun and moon and gives the method of making calendars required ...
  • Distortion wave characteristics and starspot modelling in the RS CVn eclipsing binary SV Camelopardalis 
    Sarma, C. V. S. R; Vivekananda, P; Sarma, M. B. K (Astronomical Society of India, 1990)
    Four migrating groups of wave minima are identified in the light curves of SV Cam of which two show direct motion with period 3.02 and 1.6 yr while the other two display retrograde motion with periods 3.04 and 0.6 yr. Based ...
  • Distributed data acquisition system for Pachmarhi array of Cverenkov telescopes 
    Upadhya, S. S; Acharya, B. S; Bhat, P. N; Chitnis, V. R; D'Souza, A. I; Francis, P. J; Gothe, K. S; Joshi, S. R; Majumdar, P; Manogaran, M; Nagesh, B. K; Pose, M. S; Purohit, P. N; Rahman, M. A; Rao, K. K; Rao, S. K; Sharma, S. K; Singh, B. B; Stanislaus, A. J; Sudersanan, P. V; Venkatesh Murthy, B. L; Vishwanath, P. R (Astronomical Society of India, 2002)
    Pachmarhi Array of Cverenkov Telescopes consists of 25 Telescopes distributed within an area of 8000m2. The array was designed to detect and process faint Cverenkov light flashes that lasts for a few nanoseconds, produced ...
  • Distribution of stellar mass in young star clusters of our Galaxy and nearby galaxies 
    Sagar, R (Astronomical Society of India, 2000)
    Stellar mass distribution in young star clusters of our Galaxy, the Magellanic Clouds and the nearby local groups of galaxies has been used to investigate the universality of initial mass function and presence of mass ...
  • The Distribution of the Quiet Sun Photospheric Magnetic Flux 
    Srikanth, R; Singh, J; Bagare, S. P (Astronomical Society of India, 2002-12)
    A gradient-based tessellating algorithm is used to study the magnetic field structure of the quiet Sun photosphere using SoRO full disk magnetograms. We find that the field is not uniformly distributed, but parcelled ...
  • Do Flat Rotation Curves Include Non-Keplerian Motions? 
    Krishan, V (Astronomical Society of India, 1997)
    In an earlier paper (Prabhu and Krishan 1994) a model of the flat rotation curves of galaxies has been given. This model attempts to explain the rotation curves without invoking dark matter, instead it depends on certain ...
  • Doppler width of CN lines in the Sun 
    Punetha, L. M; Joshi, G. C (Astronomical Society of India, 1984-12)
    The Doppler widths of 0-1, 1-2 and 2-3 vibrational bands of the violet system of CN molecule in the solar atmosphere increase linearly with equivalent width upto approximately equal to 20 mA
  • A double peaked pulse profile observed in GX 1 + 4 
    Paul, B; Agrawal, P. C; Rao, A. R; Manchanda, R. K (Astronomical Society of India, 1996)
    The hard X-ray pulsar GX 1+4 was observed several times in the last few years with a pair of balloon-borne Xenon filled Multi-cell Proportional Counters (XMPC). In a balloon flight made on 22 March 1995, the source was ...
  • Double pulsar system J0737-039 and its low-frequency observations with GMRT 
    Joshi, B. C; McLaughlin, M. A; Lyne, A. G; Kramer, M; Lorimer, D. R; Manchester, R. N; Camilo, F; Burgay, M; Possenti, A; Amico, N. D; Freire, P. C. C (Astronomical Society of India, 2004-09)
    The recent discovery of two radio pulsars, with periods of 23 ms and 2.8 s, in a tight 2.4 hour highly relativistic double neutron star binary, is one of the most significant discoveries of pulsar astronomy (Burgay et al. ...
  • Double ribbon flare of 1981 October 19 
    Verma, V. K; Pande, M. C (Astronomical Society of India, 1983-03)
    Photographic observations with a 0.7 A passband H-alpha Halle filter and morphological description of the double ribbon flare which occured near Halle plage region 17926 on 1981 October 19 are described. Initially the flare ...
  • A double-pass spectrograph for solar research 
    Kariyappa, R; Jayarajan, A. P; Raheem, K. C. A; Sivaraman, K. R (Astronomical Society of India, 1993-06)
    We have described the double-pass spectrograph built at the Indian Institute of Astrophysics. Measurements of the scattered light within the spectrograph using the photoelectric scans of the NaI D-lines show that this is ...

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