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  • Goswami, A; Kameswara Rao, N; Lambert, D. L (Astronomical Society of India, 2001)
    The star XX Oph has been known to exhibit peculiar spectral variabilities since the work of Merrill in 1924. A high resolution spectroscopic study of the XX Oph spectra taken in July 1996 and later in June 1997 also exhibit ...
  • Kameswara Rao, N; Goswami, A; Lambert, D. L (Astronomical Society of India, 2002-09)
    High resolution spectral analysis of QY Sge, a post AGB star is presented here. The spectrum of QY Sge is characterized by three major components: absorption lines representative of a G supergiant, sharp emission lines ...
  • Lambert, D. L; Kameswara Rao, N; Giridhar, S (Indian Academy of Sciences, 1990-12)
    Moderate-resolution spectra of the C2 Swan 0-1 bandhead, the Na I D lines and the K I resonance lines near 7660 A obtained at minimum light during the 1988-1989 decline of R CrB are discussed and interpreted in terms of a ...
  • Parthasarathy, M; García-Lario, P; Sivarani, T; Manchado, A; Sanz Fernández de Córdoba, L (European Southern Observatory, 2000-05)
    SAO 85766 (b = +20o) is an IRAS source with far-infrared colours similar to planetary nebulae. According to the HDE catalogue, its spectrum in 1940 was that of an A5 star. The UV fluxes and colours derived from data obtained ...
  • Sarkar, G; Parthasarathy, M; Reddy, B. E (EDP Sciences, 2005-03)
    High resolution spectra covering the wavelength range 4900 Å to 8250 Å of the hot post-AGB stars IRAS 13266-5551 (CPD-55 5588) and IRAS 17311-4924 (Hen3-1428) reveal absorption lines of C II, N II, O II, Al III, Si III and ...
  • Kameswara Rao, N; Lambert, D. L (American Astronomical Society, 1993-05)
    The R Coronae Borealis star V854 Cen was observed at minimum light (V about 15) at high spectral resolution from 5480 to 7070 A. The spectrum consists of three components: a continuum devoid of photospheric lines, a ...
  • Giridhar, S; Kameswara Rao, N; Lambert, D. L (Indian Academy of Sciences, 1992)
    A detailed spectroscopic investigation of LR Sco which was earlier misclassified as R CrB star is made. Atmospheric parameters and elemental abundances are determined using detailed depth-dependent model atmospheres and ...
  • Giridhar, S (Astronomical Society of India, 2000)
  • Kumar, V; Dave, H (Astronomical Society of India, 2003)
    In order to explain the characteristic features of planetary atmosphere, detection and precise measurements of environmentally important gases such as CO, CIO, No becomes necessary. Since most of the polyatomic molecules ...
  • Kameswara Rao, N; Sriram, S; Jayakumar, K; Gabriel, F (Indian Academy of Sciences, 2005-09)
    The optical design and performance of the recently commissioned fiber fed echelle spectrometer of 2.34 meter Vainu Bappu Telescope are described. The use of it for stellar spectroscopic studies is discussed.
  • Fernandes, F. C. R; Krishan, V; Andrade, M. C; Cecatto, J. R; Freitas, D. C; Sawant, H. S (Elsevier B. V., 2003)
    We report high resolution observations of the Intermediate Drift (IMD) bursts in decimetric band (ν = 950 2650 MHz). With a time resolution of 20 - 50 ms and a frequency resolution of 4 - 10 MHz, we are able to estimate ...
  • Cecatto, J. R; Sawant, H. S; Fernandes, F. C. R; Krishan, V; Neri, J. A. C. F; Moraes, J. C (Elsevier B. V., 2003)
    Type-III bursts are signatures of the electron beams accelerated during the solar flares, their observation and investigation provide information of the acceleration processes, the characteristics of the exciting agent and ...
  • Sharma, D. P; Marar, T. M. K; Seetha, S; Kasturirangan, K; Rao, U. R; Bhattacharyya, J. C (INSDOC, 1983-08)
    High speed optical photometric observations of the hard X-ray source EX Hya, carried out with the reflector of the Kevalur Observatory, are presented. The observations with time resolutions of 1 s or 2 s were made on four ...
  • Ashoka, B. N; Seetha, S; Marar, T. M. K; Kasturirangan, K; Rao, U. R; Bhattacharyya, J. C (European Southern Observatory, 1994-03)
    High speed optical photometric observations of PG 1012 - 029, conducted during 1990-1991, confirm the nova-like classification of the object. Several eclipses observed by us have been used to refine the orbital period of ...
  • Seetha, S; Padmini, V. N; Marar, T. M. K; Kasturirangan, K; Rao, U. R; Bhattacharyya, J. C (Konkoly Observatory, 1985-12)
  • Seetha, S; Padmini, V. N; Marar, T. M. K; Kasturirangan, K; Rao, U. R; Bhattacharyya, J. C (Konkoly Observatory, 1985-12-20)
  • Akshata Nayak; Sreejith, A. G; Safonova, M; Murthy, J (Indian Academy of Sciences, 2013-03-25)
    Recent advances in balloons and in electronics have made possible scientific payloads at costs accessible to university departments. The primary purpose of high-altitude ballooning programme is to test low-cost ultraviolet ...
  • Banyal, R. K; Prasad, B. R (Optical Society of America, 2005-09)
    We report experiments with nonlinear-absorption-based, high-contrast, all-optical switching in photochromic bacteriorhodopsin (BR) films. The switching action is accomplished by control of the transmission of a weak probe ...
  • Sahu, P. K; Basu, R; Datta, B (American Astronomical Society, 1993-10-10)
    We present a field theoretical equation of state for nuclear matter and neutron-rich matter in β equilibrium using the chiral sigma model. The model includes an isoscalar vector field generated dynamically and reproduces ...
  • Narang, Nancy; Pant, V; Banerjee, D; Doorsselaere, Tom Van (Frontiers, 2019-05-16)
    The high temporal, spatial and spectral resolution of Interface Region Imaging Spectrograph (IRIS) has provided new insights into the understanding of different small-scale processes occurring at the chromospheric and ...

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