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Browsing by Author "Vasundhara, R"

Browsing by Author "Vasundhara, R"

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  • Mutual phenomena of Jovian satellites 
    Vasundhara, R (Indian Academy of Sciences, 1991-03)
    Mutual eclipses of Galilean satellites were observed and the results are given. The observations are fitted by utilizing Lambert's law, theoretical models assuming a uniform disk, and Lommel-Seeliger's law which describes ...
  • Mutual phenomena of Jovian satellites in 1990-1991 
    Vasundhara, R (Astronomical Society of India, 1990-03)
  • Mutual phenomena of the Galilean satellites: an analysis of the 1991 observations from VBO 
    Vasundhara, R (European Southern Observatory, 1994-01)
    Results of analysis of seventeen mutual events, of the Galilean satellites, observed at the Vainu Bappu Observatory (VBO) during the 1991 are presented. The light curves were fitted with theoretical models to derive the ...
  • New constants for SampsonLieske theory of the Galilean satellites of Jupiter from mutual occultation data 
    Vasundhara, R; Arlot, J. E; Descamps, P (International Astronomical Union, 1996)
    New constants for sampson-Lieske theory of the Galilean satellites have been derived using 6360 individual photographic positions (1891-1990) and 438 pseudo astrometric positions from mutual occulations during 1973,1979,1985 ...
  • Observations of comet Shoemaker-Levy 9 from Japal-Rangapur Observatory 
    Vasundhara, R; Chakraborty, P; Rajamohan, R; Bhattacharyya, J. C; Som Sunder, G; Vivekananda Rao, P; Swaminathan, R; Lokanandham, B (Indian Academy of Sciences, 1995-02)
  • Observations of occulation of HIP 66446 by (423) Diotima on 2001 March 15 from India - Detection of a companion to the star 
    Vasundhara, R; Jayakumar, K; Velu, C; Appakutty, M; Paranjpye, A; Kulkarni, H; Nitsure, P; Prabhunne, M; Shah, K (Astronomical Society of India, 2001)
    Observations of the occulation of the star HIP 66446 by (423) Diotima on 2001 March 15 made by the team at the Vainu Bappu Observatory and three mobile teams at Ganeshgudi, Londa and the CES Field Research Station at Sirsi ...
  • Occultation of 2UCAC 42376428 by (423) Diotima on 2005 March 06 
    Vasundhara, R; Kuppuswamy, K; Ramamoorthy, S; Velu, C; Venkataramana, A. K (Astronomical Society of India, 2006-03)
    Observations of the occultation of the star 2UCAC 42376428 by (423) Diotima on 2005 March 06 at the Vainu Bappu Observatory are reported. The observed mid time of the event at 15:12:25.1 UT occurred 3.4 s later than the ...
  • Occultations by possible material in Saturn's outer magnetosphere 
    Vasundhara, R (Indian Academy of Sciences, 1988-03)
    Results are presented of a search in the SAO catalogue for occultations of stars by Saturn's magnetosphere occurring during 1988. The instantaneous apparent position of the star, angle of inclination of the ring plane to ...
  • Occultations by possible material in Saturn's outer magnetosphere. II 
    Vasundhara, R (Indian Academy of Sciences, 1989-03)
    Results of a search for occultations of stars in the SAO catalog by Saturn's outer magnetosphere during 1989-1990 are presented. A total of nine events are predicted to occur during this period. The most favorable event ...
  • An Optical, Dual-Beam, Automated Medium Resolution Spectropolarimeter for the Vainu Bappu Telescope 
    Chakraborty, P; Vasundhara, R (Springer, 2003-03)
    Fabrication of an optical dual-beam spectropolarimeter as an add-on facility to an existing astronomical spectrograph at the Vainu Bappu Telescope is described. The polarimetric optics consists of a superachromatic ...
  • Outer rings of Saturn 
    Bhattacharyya, J. C; Vasundhara, R (Indian Academy of Sciences, 1985)
    A two component model of a possible ring structure at about 12.5 Saturn radii is presented here which can explain the shapes of the immersion and emersion occultation profiles obtained during the occultation of SAO 158913 ...
  • Personal computer based star changing device and occultation data acquisition system 
    Srinivasan, R; Naidu, B. N; Vasundhara, R (Council of Scientific & Industrial Research, 1993-01)
    This paper describes a personal computer interface card developed for occultation studies with the 1 m telescope at VBO Kavalur. The new feature of this system is the application of a personal computer for the accurate ...
  • The PHEMU03 catalogue of observations of the mutual phenomena of the Galilean satellites of Jupiter 
    Arlot, J. E; Thuillot, W; Ruatti, C; Ahmad, A; Amosse, A; Anbazhagan, P; Andreyev, M; Antov, A; Appakutty, M; Aubry, S; Asher, D; Spampinato, S. A; Stellmacher, I; Trunkovsky, E; Tejfel, V; Tudose, V; Turcu, V; Ugarte, I; Vantyghem, P; Vasundhara, R; Vaubaillon, J; Baron, N; Velu, C; Venkataramana, A. K; Vidal Sãinz, J; Vienne, A; Vilar, J; Vingerhoets, P; Vollman, W; Bassiere, N; Berthe, M; Bogdanovski, R; Bosq, F; Bredner, E; Buettner, D; Buromsky, M; Cammarata, S; Casas, R; Chis, G. D; Christou, A. A; Coquerel, J. P; Corlan, R; Cremaschini, C; Crussaire, D; Cuypers, J; Dennefeld, M; Descamps, P; Devyatkin, A; Dimitrov, D; Dorokhova, T. N; Dorokhov, N. I; Dourneau, G; Dueñas, M; Dumitrescu, A; Emelianov, N; Ferrara, D; Fiel, D; Fienga, A; Flatres, T; Foglia, S; Garlitz, J; Gerbos, J; Gilbert, R; Goncalves, R. M. D; Gonzales, D; Gorda, S. Y; Gorshanov, D. L; Hansen, M. W; Harrington, M; Irsmambetova, T. R; Ito, Y; Ivanova, V; Izmailov, I. S; Khovritchev, M. Y; Khrutskaya, E. V; Kieken, J; Kiseleva, T. P; Kuppuswamy, K; Lainey, V; Lavayssiere, M; Lazzarotti, P; Le Campion, J. F; Lellouch, E; Li, Z. L; Lo Savio, E; Lou, M; Magny, E; Manek, J; Marinello, W; Marino, G; McAuliffe, J. P; Michelli, M; Moldovan, D; Montagnac, S; Moorthy, V; Nickel, O; Nier, J. M; Noel, T; Noyelles, B; Oksanen, A; Parrat, D; Pauwels, T; Priban, V; Ramachandran, B; Rambaux, N; Rapaport, M; Rapavy, P; Rau, G; Sacre, J. J; Sada, P. V; Salvaggio, F; Sarlin, P; Sciuto, C; Selvakumar, G; Sergeyev, A; Sidorov, M; Sorescu, S (EDP Sciences, 2009-01)
    Context: In 2003, the Sun and the Earth passed through both the equatorial plane of Jupiter and therefore the orbital planes of its main satellites. Aims: During this period, mutual eclipses and occultations were observed ...
  • The PHEMU15 catalogue and astrometric results of the Jupiter's Galilean satellite mutual occultation and eclipse observations made in 2014-2015 
    Saquet, E; Emelyanov, N; Robert, V; Arlot, J. -E; Anbazhagan, P; Baillie, K; Bardecker, J; Berezhnoy, A. A; Bretton, M; Campos, F; Capannoli, L; Pomazan, A; Popescu, M; Pratt, A; Raskhozhev, V. N; Resch, J.-M; Robilliard, D; Roschina, E; Rothenberg, E; Rottenborn, M; Rusov, S. A; Talbot, J; Saby, F; Saya, L. F; Selvakumar, G; Signoret, F; Slesarenko, V. Y; Sokov, E. N; Soldateschi, J; Sonka, A; Soulie, G; Tejfel, V. G; Thuillot, W; Timerson, B; Toma, R; Torsellini, S; Trabuco, L. L; Traverse, P; Tsamis, V; Unwin, M; Carry, B; Van Den Abbeel, F; Vandenbruaene, H; Vasundhara, R; Velikodsky, Y. I; Vienne, A; Vilar, J; Vugnon, J. -M; Wuensche, N; Zeleny, P; Castet, M; Charbonnier, Y; Chernikov, M. M; Christou, A; Colas, F; Coliac, J. -F; Dangl, G; Dechambre, O; Delcroix, M; Dias-Oliveira, A; Drillaud, C; Duchemin, Y; Dunford, R; Ellington, C; Fabre, P; Filippov, V. A; Finnegan, J; Foglia, S; Font, D; Gaillard, B; Galli, G; Garlitz, J; Gasmi, A; Gaspar, H. S; Gault, D; Gazeas, K; George, T; Gorda, S. Y; Gorshanov, D. L; Gualdoni, C; Guhl, K; Halir, K; Hanna, W; Henry, X; Herald, D; Houdin, G; Ito, Y; Izmailov, I. S; Jacobsen, J; Jones, A; Kamoun, S; Kardasis, E; Karimov, A. M; Khovritchev, M. Y; Kulikova, A. M; Laborde, J; Lainey, V; Lavayssiere, M; Guen, P. Le; Leroy, A; Loader, B; Lopez, O. C; Lyashenko, A. Y; Lyssenko, P. G; Machado, D. I; Maigurova, N; Manek, J; Marchini, A; Midavaine, T; Montier, J; Morgado, B. E; Naumov, K. N; Nedelcu, A; Newman, J; Ohlert, J. M; Oksanen, A; Pavlov, H; Petrescu, E (Oxford University Press on behalf of the Royal Astronomical Society, 2018-03)
    During the 2014–2015 mutual events season, the Institut de M ́ ecanique C ́ eleste et de Calcul des ́ Eph ́ em ́ erides (IMCCE), Paris, France, and the Sternberg Astronomical Institute (SAI), Moscow, Russia, ...
  • The PHEMU21 catalogue and astrometric results of the observations of the mutual occultations and eclipses of the Galilean satellites of Jupiter made in 2021 
    Emelyanov, N; Arlot, J-E; Anbazhagan, P; Andre, P; Bardecker, J; Canaud, G; Coliac, J. F; De Elias Cantalapiedra, J; Ellington, C. K; Fernandez, J. M; Forbes, M; Gazeas, K; Gault, D; George, T; Gourdon, F; Herald, D; Huber, D; Iglesias-Marzoa, R; Izquierdo, J; Jorba Lloveras, R; Kerr, S; Lasala, A; Le Guen, P; Leroy, A; Lutz, M; Maley, P; Mannchen, T; Mari, J. M; Maury, A; Newman, J; Palafouta, S; Prieto Gallego, J; Roger, P; Roschli, D; Selvakumar, G; Serra, V; Stuart, P; Turchenko, M; Vasundhara, R; Velasco, E (Oxford University Press on behalf of Royal Astronomical Society, 2022-11)
    2021 wasthe year ofJupiter’s equinox, that isthe Sun and the Earth passed through the equatorial plane of the planet and therefore the orbital planes of its main satellites. This occurrence made it possible to observe ...
  • The PHEMU97 catalogue of observations of the mutual phenomena of the Galilean satellites of Jupiter 
    Arlot, J. -E; Thuillot, T; Ruatti, C; Akasawa, A; Baroni, S; Beisker, W; Berthier, J; Blanco, C; Boonstra, J; Bourgeois, J; Bulder, H; Casas, R; Castano, J. G; Colas, F; Collins, D; Cuypers, J; Czech, W; D'Ambrosio, V; Denzau, H; Descamps, P; Dimitrescu, A; Dinakarian, N; Dourneau, G; Enriquez, J. M; Fernandez, J. M; Fernandez-Barba, D; Flatres, T; Goncalves, M; Guhl, K; Helmer, G; Hirose, T; Irsmambetova, T. R; Krobusek, B. A; Lecacheux, J; Le Campion, J.-F; Lou, M; Mallama, A; Nelson, P; Okura, N; Park, J; Pauwels, T; Pluchino, S; Priban, V; Rapaport, M; Sacré, J.-J; Salvaggio, F; Sanchez, M. A; Sanchez-Bajo, F; Stefanescu, G; Tanga, P; Tejfel, V. G; Trisan, J. L; Trunkovsky, E. M; Vandenbulcke, G; Vasundhara, R; Vass, G; Vingerhoets, P; Vu, D. T; Wilds, R. T (EDP Sciences, 2006-05)
    In 1997 the Sun and the Earth passed through the equatorial plane of Jupiter and therefore through the orbital planes of its main satellites. During this period, mutual eclipses and occultations occurred and were observed. ...
  • A photometric-dynamic model to simulate coma and jets from a comet. Application to comet Hale-Bopp (C/1995 O1) 
    Vasundhara, R (EDP Sciences, 2002-01)
    A model to compute the trajectories of dust grains ejected by comets to simulate intensity and polarization maps on the sky plane is presented. The model is used to constrain the silicate to organic mass ratio, porosity ...
  • Physical Studies of Solar System Objects 
    Vasundhara, R (Indian Institute of Astrophysics, Bangalore, 1993-02)
  • 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 ...
  • Possible Detection of a Ring System in Saturn's Magnetosphere 
    Vasundhara, R; Bhattacharyya, J. C; Santhanam, P; Pande, A. K; Mohan, V; Mahra, H (Nature Publishing Group, 1984-12)
    The region of the magnetosphere of Saturn around 14 radii and 19 radii has been of special interest since the detection of anomalous dips in the low-energy plasma ion-density in these regions by the Voyager 1, Voyager 2 ...

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