IIA Institutional Repository

Browsing Publications of Astronomical Society of India by Title

Browsing Publications of Astronomical Society of India by Title

Sort by: Order: Results:

  • Radio spectrum measurements at the Gauribidanur observatory 
    Monstein, C; Ramesh, R; Kathiravan, C (Astronomical Society of India, 2007-12)
    During a campaign in December 2006, radio spectrum measure- ments over the frequency range 45-870 MHz were carried out at the Gauribida- nur observatory, located about 100 km north of Bangalore. The spectrometer used for ...
  • Radio Studies of young core collapse supernovae 
    Chandra, P; Ray, A; Bhatnagar, S (Astronomical Society of India, 2002-09)
    Multi-frequency observations of two radio bright SNe (SN1993J, SN1979C) carried out over a year with GMRT are presented. Their radio light curves trace the evolution of the mass loss in the stellar wind before the pre-supernova ...
  • Radio Study of a Superwind-galaxy: NGC1482 
    Hota, A; Saikia, D. J (Astronomical Society of India, 2003)
    We present GMRT and VLA observations of the superwind galaxy, NGC1482, which has been discovered to have a remarkable hour-glass shaped optical emission line outflow on both sides of the galactic disk. The central region ...
  • Radio study of the Galactic Centre Environment 
    Roy, S (Astronomical Society of India, 2002-09)
    The central region of our milky way Galaxy still eludes a comprehensive understanding. With new observations. however. we are being able to know many of the observable properties of the sources, which allow us to better ...
  • 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 ...
  • The Ray system in the neighbourhood of proclus 
    Mitchell, J (Astronomical Society of India, 1913-04)
  • Receiver System for Two Ooty Synthesis Radio Telescope 
    Narayana, D. L; Venkatasubramani, T. L; Bagri, D. S (Astronomical Society of Indian, 1988)
    This paper describes the receiver system of the 4 km Ooty synthesis radio telescope (OSRT), consisting of 13 elements operating at 327 MHz. Major subsystems of the receiver electronics are briefly discussed. A round-trip ...
  • Recent astronomical site survey at Hanle, Ladakh 
    HIROT Team (Astronomical Society of India, 1996)
    The aspirations of Indian astronomers for a high altitude observatory have led to the exploration of Hanle, southeastern Ladakh as a possible site. After a discussion of the historical background, we present results of the ...
  • Recent development in optical and IR polarimetry 
    Joshi, U. C (Astronomical Society of India, 1993)
    Polarimetry in recent years has matured and high precision measurements, from radio to UV wavelength, are possible in various modes: photo polarimetry, spectropolarimetry or imaging polarimetry. Within the country polarization ...
  • A recent multi-wavelength campaign to observe the microquasar SS433 
    Chakrabarti, S. K (Astronomical Society of India, 2005-06)
    We present a summary of the recent multiwavelength campaign made in September-October, 2002, to observe SS 433. We used the Giant Meterwave Radio Telescope (GMRT) for radio observation, 1.2 meter Physical Research Laboratory ...
  • Recent observations of lES2344+514 and PSR 0355+54 with TACTIC Imaging Element 
    Tickoo, A. K; Dhar, V. K; Yadav, K. K; Rannot, R. C; Bhattacharyya, S; Chandra, P; Goyal, H. C; Kaul, C. L; Kaul, R. K; Kothari, M; Kotwal, S; Koul, R; Sahayanathan, S; Sapru, M. L; Sharma, M; Venugopal, K; Bhatt, N; Bhatt, C. L (Astronomical Society of India, 2002-09)
    The TACTIC Imaging Element has observed the active galaxy 1ES 2344+514 and the pulsar PSR 0355+54 during Oct-Nov, 2001. Analysis of the recorded events, collected for a period of 70 hours on both these sources reveals ...
  • Recent results on crab nebula and Mkn-421 observations with TACTIC imaging element 
    Bhatt, N; Agarwal, N. K; Bhat, C. K; Bhattacharaya, S; Charagi, S. K; Chandra, P; Chauhan, N; Dhar, V. K; Goyal, A; Goyal, H. C; Kamath, K; Kaul, C. L; Kaul, I. K; Kaul, R. K; Kaul, S. K; Kaul, S. R; Sharma, M; Kothari, M; Kotwal, S. V; Koul, D. K; Koul, M. K; Rannot, R. C; Razdan, A. K; Sahaynathan, S; Sapru, M. L; Satyabhama, N; Tickoo, A. K; Venugopal, K; Yadav, K. K; Bhat, C. L (Astronomical Society of India, 2002)
    The results of our recent observational campaigns on the Crab Nebula and Mkn-421, carried out with the 349-pixel Imaging Element of the TACTIC array, are presented alongwith the details of the data analysis. Analysis of ...
  • Reclassification of gamma-ray bursts based on their brightness distributions 
    Shanthi, K; Bhat, C. L (Astronomical Society of India, 2002)
    A reclassification of the cosmic gamma-ray bursts has been done into two distinct classes on the basis of their brightness distributions. While one (majority) class is found to be compatible with a homogeneous and ...
  • Recombination efficiency of molecular hydrogen on interstellar grains and its effect on pro duction of H/sub2/ 
    Acharyya, K; Chakrabarti, S. K (Astronomical Society of India, 2005-12)
    We study the efficiency of molecular hydrogen recombination on grain surfaces using both the rate equation (which tracks the average number of species) and the master equation (which tracks the expectation values of the ...
  • Reconstruction of Total Solar Irradiance on Multiple Time Scales 
    Jain, K; Hasan, S. S (Astronomical Society of India, 2003)
    We have developed regression models of total solar irradiance on different time scales by parameterizing the combined influence of sunspots and faculae. These models are useful in identifying the key parameters responsible ...
  • Record of Planetary Evolution in Tiny Sea Shells 
    Bhandari, N (Astronomical Society of India, 1979-03)
  • Records of the past solar activity in terrestrial and meteorite archives 
    Bhandari, N (Astronomical Society of India, 1998)
    Time series of cosmogenic radioisotopes in tree rings, sedimentary deposits on sea beds and ice cores form the polar ice caps show a large number of periodicities. Many of them can be attributed to changes in galactic ...
  • Recurrent mass ejection associated with flare behind the limb on 1978 December 20 
    Jain, Rajmal; Bhatnagar, A; Shelke, R. N (Astronomical Society of India, 1984-06)
    An interesting solar flare occured on 1978 December 20 behind the north-west limb, in the McMath active region no. 15700, as inferred from the observed associated energtic mass ejections, strong x-rays, decimetric and ...
  • Redetermination of the Hubble Constant and the Deceleration Parameter 
    Chitre, S. M (Astronomical Society of India, 1975-03)
  • A relation between frequency shift and the changes in activity indices 
    Jain, K; Tripathy, S. C; Kumar, B; Bhatnagar, A (Astronomical Society of India, 2000)
    We present a linear relation between the shift in p-mode frequencies and variation in two solar activity indices, namely the sunspot number and 10.7 cm radio flux. From this relation, an empirical model is constructed to ...

Search DSpace


Browse

My Account