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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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  • Performance of the low light level CCD camera for speckle imagmg 
    Saha, S. K; Chinnappan, V (Astronomical Society of India, 2002-09)
    A new generation CCD detector caJ.led low light level OOD (L3CCD) that performs like an intensified CCD without incorporating a micro channel plate (MOP) for light amplification was procured and tested. A series of ...
  • Performance studies of the PACT experiment 
    Vishwanath, P. R; Acharya, B. S; Bhat, P. N; Chitnis, V. R; Majumdar, P; Rahman, M. A; Singh, B. B (Astronomical Society of India, 2002)
    Monte Carlo calculations have been done to understand various characteristics like the energy threshold, collection area etc of the recently commissioned PACT. The energy threshold of the array for gamma rays is found to ...
  • Period study of the Algol-type eclipsing binary - R Canis Majoris 
    Radhakrishnan, K. R; Abhyankar, K. D; Sarma, M. B. K (Astronomical Society of India, 1984-06)
    Photoelectric observations of the Algol-type eclipsing binary R Canis Majoris during three consequtive observing seasons of 1979-82 gave a total of ten primary minima in each of the V and B passbands and nine in the U ...
  • Period study of the RS CVn eclipsing binary SV Camelopardalis 
    Sarma, C. V. S. R; Sarma, M. B. K; Abhyankar, K. D (Astronomical Society of India, 1985-12)
    Using the available photographic and photoelectric times of minima, we have revised the elements of the light-time orbit of SV Camelopaedalis, an RS CVn type eclpsing binary. Taking a mass function of 0.118 M and the ...
  • Period study of the short period RS CVn type eclipsing binary UV Piscium 
    Vivekananda Rao, P; Sarma, M. B. K (Astronomical Society of India, 1983-03)
    The short period RS CVn type eclipsing binary UV Piscium was observed photoelectrically with standard U, B, V filters for three consecutive observing seasons during 1976-1979. A total of nine primary minima in each of V ...
  • Period-brightness relationship in chromospheric bright points 
    Kariyappa, R; Satya Narayanan, A; Dame, L (Astronomical Society of India, 2005-03)
    Chromospheric bright points are sites where intense heating takes place by 3-min period waves. A 35-min-long time series of photographic spectra obtained in CaII H-line on a quiet region at the center of the solar disk ...
  • Periodic activity in the T Tauri star TW Hya 
    Mekkaden, M. V (Astronomical Society of India, 1990)
    UBVRI photometry of the isolated T Tauri star TW Hya, obtained during 1987 April from ESO, is presented. The data analysis shows a periodicity of 2.195 d in light variation. The steep increase of amplitude towards shorter ...
  • Periodicities in the Sun's "Torsional MHD oscillations" and planetary configurations 
    Javaraiah, J (Astronomical Society of India, 1996)
    Recently, we studied the rotaion of sunspot gruoups during 1879-1976 and detected ~ 22-yr and a few more other periods 'even' and 'odd' parity torsional oscillations of the Sun (Javaraiah & Gokhale 1995a, b). In the present ...
  • Periodicity of the generating solutions of the restricted three-body problem in k three-dimensional coordinate system 
    Hassan, M. R (Astronomical Society of India, 2001)
    This paper deals with the periodicity of the generating solutions of the restricted three-body problem in three-dimensional coordinate system in KS-variables in the light of Krashinski (1963), Kurcheeva (1973) and Ahmad (1995).
  • Periodogram Analysis of the Light Curves of 44 TAU 
    Gupta, S. K (Astronomical Society of India, 1979-03)
    The periodogram analysis of the light curves of the delta Scuti star 44 Tau (=HR 1287) has been carried out. The Fundamental period of 44 TAU, based on the epochs of maximum, is found to be 0.d144969 and the beat period ...
  • Perspective of long baseline optical interferometry 
    Saha, S. K; Morel, S (Astronomical Society of India, 2000)
    This article is a sort of sequel of the earlier extensive review by Saha (1991a) where emphasis was laid down on the ground based single aperture, as well as on the working long baseline optical interferometers (LBI) ...
  • Phase and field Measurements at VLF, LF and HF During the Solar Eclipse of February 16, 1980 -- Preliminary Results 
    Dixit, P. S; Rao, P. K; Bhonsle, R. V; Sethia, G; Deshpande, M. R; Chandra, H (Astronomical Society of India, 1980-12)
    Phase and field measurements at 16kHz (VLF) by monitoring GBR (Rugby, England) and at 10 MHz (HF) ATA (New Delhi) were carried out from Satellite Tracking and Ranging Station (Kavalur) during the solar eclipse of February ...
  • Phase difference between the two components of the solar cycle 
    Gokhale, M. H; Sivaraman, K. R (Astronomical Society of India, 1982-06)
    It is confirmed that near each solar minimum the latitude zone over which the small sunspot groups are distributed expands a few years before the expansion of the latitude zone of the large spot groups takes place. It is ...
  • Phase retardation of light due to scattering by interstellar nonspherical grains 
    Shah, Ghanshyam, A (Astronomical Society of India, 1983-03)
    The phase retardation by cylindrical grains composed of pure (index of refraction, m=1.33 - i0.0) and dirty (m = 1.33 - i0.05) ice materials has been investigated. It has been found that the resulting interstellar circular ...
  • Photo-electric observations of shadow bands during 1995 total solar eclipse from Neem ka thana (India) 
    Shelke, R. N; Ingole, V. T (Astronomical Society of India, 1998)
  • Photographic astrometry of Comet Halley 
    Ballabh, G. M; Kilambi, G. C; Sanwal, N. B; Sreedhar Rao, S; Swaminathan, R; Raghavender Rao, C (Astronomical Society of Indian, 1989-12)
    The 20-cm astrograph of the Nizamiah and Japal-Rangapur Observatoies in India was used to obtain photographic plates of Comet Halley before and after perihelion during the 1985-1986 apparition. The images are reduced and ...
  • Photographic observations of comet Swift-Tuttle (1992t) 
    Joshi, S. C; Srivastava, J. B; Rautela, B. S; Sanwal, B. B (Astronomical Society of India, 1995)
    Positions of comet Swift-Tuttle (1992t)have been measured from photographic plates taken at the Cassegrain focus of the 104-cm telescope of Uttar Pradesh State Observatory (UPSO).
  • Photoionization cross sections for the Fe XVII ion 
    Baliyan, K. S; Joshi, U. C (Astronomical Society of India, 2000)
  • Photometric and spectroscopic evolution of type II-P supernova SN 2004A 
    Gurugubelli, U. K; Sahu, D. K; Anupama, G. C; Chakradhari, N. K (Astronomical Society of India, 2008-09)
    We present optical photometry and spectroscopy of the normal type IIP supernova SN2004A, which was discovered in the galaxy NGC 6207 on 2004 January 9.84UT. Early observations indicated that the supernova was discovered ...
  • Photometric Catalogs of Four EMSS Poor Clusters of Galaxies 
    Sharma, M; Prabhu, T. P (Astronomical Society of India, 2002-12)
    We have used the 2.3-meter Vainu Bappu Telescope to perform CCD imaging of X-ray-selected poor clusters of galaxies. Our sample consists of four X-ray luminous clusters in the Einstein Observatory Extended Medium ...

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