IIA Institutional Repository

Browsing by Author "Jain, S. K"

Browsing by Author "Jain, S. K"

Sort by: Order: Results:

  • A rapid scan Fourier transform infrared spectrometer 
    Jain, S. K; Smyth, M. J (Astronomical Society of Indian, 1988-12)
    A rapid scan Fourier transform spectrometer for astronomical infrared spectroscopy, tested at the Cassegrain focus of the 102 cm telescope at Kavalur, is described. The design of the fore-optics and the performance of the ...
  • Red and reddened stars in the region of Cygnus OB2 (VI Cygni) association 
    Parthasarathy, M; Jain, S. K (European Southern Observatory, 1995-06)
    From an ultra-low dispersion spectroscopic survey of the Cyg OB2 association several red and reddened stars are detected. Most of these stars appear to be reddened early-type stars belonging to the Cygnus OB2 association. ...
  • A Single-Cell Photopolarimeter 
    Jain, S. K; Bhattacharyya, J. C (Indian Institute of Astrophysics, Bangalore, 1987-02)
    A simple, single-cell photopolarimeter has been developed for use at the cassegrain focus of the 102 cm Ritchey-Chretien reflector at Kavalur. The design and performance of the instrument are discussed
  • A Single-Channel Polarimeter 
    Jain, S. K; Bhattacharyya, J. C (International Astronomical Union, 1986)
    The authors have developed a single-channel photopolarimeter to measure polarization to ≡1%, with an accuracy of 0.1%. Laboratory tests show that the performance of the instrument matches the requirements.
  • Spatio-temporal fluctuations in He I 10830 A line parameters - Evidence for spicule formation 
    Venkatakrishnan, P; Jain, S. K; Singh, J; Recely, F; Livingston, W. C (Springer Netherlands, 1992-03)
    The equivalent width, line depth, line width, and Doppler shift of the He i 10830 Å line were extracted from two time series of spectra. Scatter plots of time-averaged line depth, line width, and Doppler shifts, as well ...
  • Spectral evolution of nova V443 Scuti 1989 
    Anupama, G. C; Duerbeck, H. W; Prabhu, T. P; Jain, S. K (European Southern Observatory, 1992-09)
    Spectroscopy of the moderately fast nova V443 is presented. Observations were made during the brightness fluctuations following maximum and during the transition stage. A few broadband polarimetric observations are also ...
  • A star-and-sky chopping polarimeter: design and performance 
    Jain, S. K; Srinivasulu, G (SPIE, 1991-10)
    The authors have developed a star-and-sky chopping polarimeter for accurate measurements of linear polarization of starlight in the standard astronomical photometric U, B, V, R, and I bands. The instrumental polarization, ...
  • Study of variability of the polarization in Herbig Ae/Be stars 
    Jain, S. K; Bhatt, H. C (European Southern Observatory, 1995-06)
    We report our measurements of linear polarization of a number of Herbig Ae/Be stars made at several epochs during the period 1989-1993. These results together with the observations compiled from the published sources have ...
  • Time variability of the He I 10830 A line profile 
    Singh, J; Jain, S. K; Venkatakrishnan, P (Springer, 1994-03)
    We have studied the time-dependent behavior of the He I 10830 A line. These studies show that (1) the fluctuations of the line width are uncorrelated with the equivalent-width fluctuations and (2) the autocorrelation curves ...
  • UBVRI polarization measurements of POST AGB Stars 
    Parthasarathy, M; Jain, S. K (International Astronomical Union, 1993)

Search DSpace

Browse

My Account