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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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  • Plume-like structures of extinction clouds at 19 Saturn radii 
    Vasundhara, R; Bhattacharyya, J. C; Rozario, M (Astronomical Society of India, 1986-12)
    Observations of the occultation of the star SAO 158763 by Saturn's magnetospheric region around 19 Saturn radii on May 12, 1984 are compared with the observations by Mahra et al. (1985) of the same event. Certain disparities ...
  • Pointing-accuracy for the 1.2m Gurushikhar telescope - measurement and improvement 
    Bobra, A. D; Subhedar, D. V; Banerjee, D. P. K (Astronomical Society of India, 1998)
  • Polarimetric study of comets from Mt. Abu observatory 
    Joshi, J. C (Astronomical Society of India, 2005-06)
    The sunlight is scattered by the dust grains present in the coma and tail of comets which makes it visible. The scattered sunlight is characteristically polarized with degree of polarization generally depending upon the ...
  • Polarimetric study of the RV Tauri star AC Herculis 
    Raveendran, A. V; Kameswara Rao, N; Anandaram, M. N (Astronomical Society of Indian, 1989-09)
    BVRI polarimetry of AC Her shows that the wavelength dependence of polarization is weak with a marginal increase towards blue and that the position angle is nearly independent of wavelength. It is argued that the interstellar ...
  • Polarization and electron densities in the solar corona of 1980 February 16 
    Raju, A. K; Abhyankar, K. D (Astronomical Society of Indian, 1986-12)
    Blue and red photographs of the solar corona obtained on February 16, 1980 with the Japal-Rangapur Observatory double polarigraph are analyzed, and calculations for the degree of polarization and the angle of the magnetic ...
  • Polarization Asymmetry in CSS Sources 
    Saikia, D. J; Gupta, N (Astronomical Society of India, 2003)
    We show that the compact steep spectrum sources are more asymmetric in the polarization of the outer lobes compared with the more extended ones. This could be due to interaction of the jets with infalling material, which ...
  • Polarization in binaries 
    Barman, S. K; Peraiah, A (Astronomical Society of India, 1991)
    Theoretical models are computed for estimating linear polarization from the extended dusty outer layers of the components of a close binary system whose surfaces are distorted by rotation and mutual tidal effects. ...
  • Polarization study of BL Lacertae objects on pc-scales 
    Kharb, P; Gabuzda, D; Shastri, P (Astronomical Society of India, 2002-09)
    We present results of the VLBA3 polarization observations of "X-ray selected" BL Lac objects from the HEAO-l survey and also a few from the ROSAT-Green Bank (RGB) sample. These primarily high energy peaked BL Lacs (HBLs) ...
  • Polarization Study of the Solar Corona Using Double Polarigrpah 
    Raju, A. K (Astronomical Society of India, 1980-06)
    The Double Polarigraph, used in the total solar eclipse of 16th Feb. 1980 to study the Polarization of Corona at two wavelengths, is described briefly. The negatives are being studied and the results will be published in ...
  • Polycyclic aromatic hydrocarbons in interstellar medium 
    Rastogi, S (Astronomical Society of India, 2005-06)
    Polycyclic Aromatic Hydrocarbons (PAHs) are an important com- ponent of the Interstellar Medium (ISM). They are being used as probes for understanding of process and conditions of different astrophysical environments. The ...
  • Polysaccharides as Interstellar Grains 
    Krishna Swamy, K. S (Astronomical Society of India, 1977-09)
  • Position sensitive proportional counter 
    Vadawale, S. V; Rao, A. R; Malkar, J. P (Astronomical Society of India, 2000)
    We are developing a Position Sensitive Proportional Counter for X-rays in the energy range from 2 keV to 20 keV. With the sensitive circular area of 30 mm diameter, it can be used as an imaging detector at the focal plane ...
  • Possible Detection of 33 mu Silicate feature in Cool Stars 
    Krishna Swamy, K. S (Astronomical Society of India, 1975-12)
  • Possible Microlensing Event in the direction of M31 
    Joshi, Y. C; Pandey, A. K; Narasimha, D; Sagar, R (Astronomical Society of India, 2003)
    The Cousin R and I band photometric observations of ~ 13 x 13 field in the direction of M31 galaxy have been carried out during 1999-2001 to search for microlensing events using pixel technique. Here we report a microlensing-like ...
  • A possible scenario for the formation of the composite Large Magellanic Cloud star cluster NGC 2214 
    Bhatt, H. C; Sagar, R (Astronomical Society of India, 1992)
    The total masses and relaxation times for the two stellar populations (old and young) in the star cluster NGC 2214 are estimated. The total masses are found to be comparable. While the older population may be dynamically ...
  • Possible trends in expansion velocities of planetary nebulae evolved from common envelope binary systems 
    Muthumariappan, C; Anandarao, B. G (Astronomical Society of India, 1999)
  • Post-AGB A-F supergiant stars 
    Parthasarathy, M; Reddy, B. E (Astronomical Society of India, 1993)
    We have searched the IRAS Polar Stratospheric Clouds (PSC) for dust shells around A-F supergiant stars similar to the high galactic latitude A-F supergiants with circumstellar dust shells. We have found that HD 114855 ...
  • Pre-main sequence stars, emission stars and recent star formation in the Cygnus region 
    Bhavya, B; Mathew, B; Subramaniam, A (Astronomical Society of India, 2007-09)
    The recent star formation history in the Cygnus region is studied using 5 clusters (IC 4996, NGC 6910, Berkeley 87, Biurakan 2 and Berkeley 86). The optical data from the literature are combined with the 2MASS data to ...
  • Preliminary note on the density of the Tonk Meteorite 
    Harrison, E. P; Ghose, Babu Sailendranath (Astronomical Society of India, 1913-02)
  • Preliminary Report: 1980 Eclipse Coronal Oscillations Experiment 
    Pasachoff, J. M; Landman, Donald. A (Astronomical Society of India, 1980-12)
    We searched for short period (1 second) brightness oscillations in coronal loops during the 1980 total solar eclipse using cooled photomultipliers and digital microprocessor data handling and recording. The experiment was ...

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