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Browsing Publications based on data from IAO, Hanle by Title

Browsing Publications based on data from IAO, Hanle by Title

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  • Be phenomenon in open clusters: results from a survey of emission-line stars in young open clusters 
    Mathew, B; Subramaniam, A; Bhatt, B. C (The Royal Astronomical Society, 2008-08)
    Emission-line stars in young open clusters are identified to study their properties, as a function of age, spectral type and evolutionary state. 207 open star clusters were observed using the slitless spectroscopy method ...
  • The broad-line type ic supernova SN 2007ru: adding to the diversity of type ic supernovae 
    Sahu, D. K; Tanaka, M; Anupama, G. C; Gurugubelli, U. K; Nomoto, K (Institute of Physics, 2009-05)
    Photometric and spectral evolution of the Type Ic supernova SN 2007ru until around 210 days after maximum are presented. The spectra show broad spectral features due to very high expansion velocity, normally seen in ...
  • CCD photometry of the globular cluster NGC 5466. RR Lyrae light-curve decomposition and the distance scale 
    Arellano Ferro, A; Rojas López, V; Giridhar, S; Bramich, D. M (Blackwell Synergy, 2008-03)
    We report the results of CCD V and r photometry of the globular cluster NGC 5466. The difference image analysis technique adopted in this work has resulted in accurate time-series photometry even in crowded regions of the ...
  • CCD time-series photometry of the globular cluster NGC 5053: RR Lyrae, Blue Stragglers and SX Phoenicis stars revisited 
    Arellano Ferro, A; Giridhar, S; Bramich, D. M (Blackwell Publishing, 2010-02)
    We report the results of CCD V, r and I time-series photometry of the globular cluster NGC 5053. New times of maximum light are given for the eight known RR Lyrae stars in the field of our images, and their periods are ...
  • CCD time-series photometry of the globular cluster NGC 6981: variable star census and physical parameter estimates 
    Bramich, D. M; Figuera Jaimes, R; Giridhar, S; Arellano Ferro, A (Wiley-Blackwell, 2011-05)
    We present the results from 10 nights of observations of the globular cluster NGC 6981 (M72) in the V, R and I Johnson wavebands. We employed the technique of difference image analysis to perform precision differential ...
  • The CH fraction of carbon stars at high galactic latitudes 
    Goswami, A; Drisya, K; Shantikumar, N. S (Blackwell Publishing, 2010-02)
    CH stars form a distinct class of objects with characteristic properties like iron deficiency, enrichment of carbon and overabundance of heavy elements. These properties can provide strong observational constraints for the ...
  • CH stars at high Galactic latitudes 
    Goswami, A (Blackwell Publishing, 2005-05)
    Carbon-rich stars of Population II, such as CH stars, can provide direct information on the role of low- to intermediate-mass stars of the halo in early Galactic evolution. Thus accurate knowledge of the CH stellar population ...
  • Champagne flow and triggered star formation in NGC 1893 
    Maheswar, G; Sharma, S; Biman, J. M; Pandey, A. K; Bhatt, H. C (Blackwell Synergy, 2007-08)
    Using Hα grism spectroscopy and optical and Two-Micron All-Sky Survey photometry of the fields containing NGC 1893 and two emission nebulae, Sim 129 and Sim 130, we show the presence of a number of Hα and near-infrared ...
  • Comprehensive multiwavelength modelling of the afterglow of GRB 050525A 
    Resmi, L; Misra, K; Johannesson, G; Castro-Tirado, A. J; Gorosabel, J; Jelınek, M; Bhattacharya, D; Kubanek, P; Anupama, G. C; Sota, A; Sahu, D. K; de Ugarte Postigo, A; Pandey, S. B; Sanchez-Ramırez, R; Bremer, M; Sagar, R (Wiley-Blackwell, 2012-11)
    The Swift era has posed a challenge to the standard blast-wave model of gamma-ray burst (GRB) afterglows. The key observational features expected within the model are rarely observed, such as the achromatic steepening ...
  • The dark nature of GRB 051022 and its host galaxy 
    Castro-Tirado, A. J; Bremer, M; McBreen, S; Gorosabel, J; Guziy, S; Fakthullin, T. A; Sokolov, V. V; González Delgado, R. M; Bihain, G; Pandey, S. B; Jelínek, M; de Ugarte Postigo, A; Misra, K; Sagar, R; Bama, P; Kamble, A. P; Anupama, G. C; Licandro, J; Pérez-Ramírez, D; Bhattacharya, D; Aceituno, F. J; Neri, R (EDP Sciences, 2007-11)
    Aims.We present multiwavelength (X-ray/optical/near-infrared/millimetre) observations of GRB 051022 between 2.5 h and ~1.15 yr after the event. It is the most intense gamma-ray burst (~10-4 erg cm-2) detected by HETE-2, ...
  • Deep Impact, Stardust-NExT and the behavior of Comet 9P/Tempel 1 from 1997 to 2010 
    Meech, K. J; Pittichova, J; Yang, B; Zenn, A; Belton, M. J. S; A’Hearn, M. F; Bagnulo, S; Bai, J; Barrera, L; Bauer, J. M; Bedient, J; Bhatt, B. C; Boehnhardt, H; Brosch, N; Buie, M; Candia, P; Chen, W; Chesley, S; Chiang, P; Choi, Y; Cochran, A; Duddy, S; Farnham, T. L; Fernández, Y; Gutiérrez, P; Hainaut, O. R; Hampton, D; Herrmann, K; Hsieh, H; Kadooka, M. A; Kaluna, H; Keane, J; Kim, M; Kleyna, J; Krisciunas, K; Lauer, T. R; Lara, L; Licandro, J; Lowry, S. C; McFadden, L. A; Moskovitz, N; Mueller, B. E. A; Polishook, D; Raja, N. S; Riesen, T; Sahu, D. K; Samarasinha, N. H; Sarid, G; Sekiguchi, T; Sonnett, S; Suntzeff, N; Taylor, B; Tozzi, G. P; Vasundhara, R; Vincent, J; Wasserman, L; Webster-Schultz, B; Zhao, H (Elsevier B.V., 2011-05)
    We present observational data for Comet 9P/Tempel 1 taken from 1997 through 2010 in an international collaboration in support of the Deep Impact and Stardust-NExT missions. The data were obtained to characterize the nucleus ...
  • Deep Impact: Observations from a Worldwide Earth-Based Campaign 
    Meech, K. J; Ageorges, N; A'Hearn, M. F; Arpigny, C; Ates, A; Aycock, J; Bagnulo, S; Bailey, J; Barber, R; Barrera, L; Barrena, R; Farnham, T. L; Feldman, P; Fernández, Y. R; Filipovic, M. D; Lyke, J; Fisher, S; Fitzsimmons, A; Fong, D; Fugate, R; Jones, G. H; Serra-Ricart, M; Fujiwara, H; Fujiyoshi, T; Furusho, R; Fuse, T; Gibb, E; Groussin, O; Lynch, D; Gulkis, S; Gurwell, M; Hadamcik, E; Sharp, R; Magee, S. K; Hainaut, O; Harker, D; Harrington, D; Harwit, M; Hasegawa, S; Hergenrother, C. W; Hirst, P; Ma, J; Hodapp, K; Snell, R. L; Villanueva, G; Jones, P. A; Kadono, T; Kamath, U. W; Käufl, H. U; Kasuga, T; Kawakita, H; Kelley, M. S; Kerber, F; Kidger, M; Snodgrass, C; Kinoshita, D; von Braun, K; Maheswar, G; Knight, M; Lara, L; Larson, S. M; Lederer, S; Lee, C. F; Levasseur-Regourd, A. C; Li, J. Y; Blake, G; Li, Q. S; Licandro, J; Vora, P; Bauer, J. M; Manfroid, J; Marco, O; Martin, P; Melnick, G; Miller, S; Miyata, T; Stallard, T; Moriarty-Schieven, G. H; Moskovitz, N; Mueller, B. E. A; Wainscoat, R. J; Mumma, M. J; Belton, M. J. S; Muneer, S; Neufeld, D. A; Ootsubo, T; Osip, D; Stecklein, G; Pandea, S. K; Pantin, E; Paterno-Mahler, R; Patten, B; Walsh, K; Penprase, B. E; Peck, A; Bensch, F; Petitpas, G; Pinilla-Alonso, N; Sterken, C; Pittichova, J; Pompei, E; Prabhu, T. P; Qi, C; Rao, R; Watanabe, J; Rauer, H; Reitsema, H; Rodgers, S. D; Bhattacharya, B; Stüwe, J. A; Rodriguez, P; Ruane, R; Ruch, G; Rujopakarn, W; Sahu, D. K; Sako, S; Weaver, H. A; Sakon, I; Samarasinha, N; Sarkissian, J. M; Weiler, M; Saviane, I; Biver, N; Schirmer, M; Schultz, P; Schulz, R; Seitzer, P; Sekiguchi, T; Weaver, W; Selman, F; Honda, M; Sugita, S; Sumner, M; Suntzeff, N; Swaters, R; Takakuwa, S; Takato, N; Bockelée-Morvan, D; Thomas-Osip, J; Thompson, E; Tokunaga, A. T; Howell, E. S; Bonev, B. P; Tozzi, G. P; Tran, H; Troy, M; Trujillo, C; Van Cleve, J; Vasundhara, R; Vazquez, R; Boehnhardt, H; Vilas, F; Hutsemékers, D; Lin, Z. Y; Weissman, P. R; Welsh, W. F; Wilner, D; Wolk, S; Womack, M; Wooden, D; Woodney, L. M; Woodward, C; Wu, Z. Y; Iono, D; Wu, J. H; Lisse, C. M; Bonev, T; Yamashita, T; Yang, B; Yang, Y. B; Yokogawa, S; Zook, A. C; Zauderer, A; Zhao, X; Ip, W. H; Zhou, X; Zucconi, J. M; LoCurto, G; Buie, M. W; Burton, M. G; Butner, H. M; Cabanac, R; Campbell, R; Campins, H; Capria, M. T; Jackson, W; Carroll, T; Chaffee, F; Charnley, S. B; Lovell, A. J; Cleis, R; Coates, A; Cochran, A; Colom, P; Conrad, A; Coulson, I. M; Jehin, E; Crovisier, J; deBuizer, J; Dekany, R; de Léon, J; Lowry, S. C; Dello Russo, N; Delsanti, A; DiSanti, M; Drummond, J; Dundon, L; Jiang, Z. J; Etzel, P. B (Science, 2005-10)
    On 4 July 2005, many observatories around the world and in space observed the collision of Deep Impact with comet 9P/Tempel 1 or its aftermath. This was an unprecedented coordinated observational campaign. These data show ...
  • Deep J -band imaging of high redshift QSO candidates with the Himalayan Chandra Telescope 
    Goto, T; Ojha, D (Astronomical Society of India, 2006)
    High redshift QSOs (redshift >5.7) are highly important ob jects. If such QSOs may be found, their spectra will reveal the onset of reionization of the intergalactic medium (Gunn-Peterson trough), and provide precious in ...
  • Discovery of Main-belt Comet P/2006 VW139 by Pan-STARRS1 
    Hsieh, H. H; Yang, Bin; Haghighipour, N; Kaluna, H. M; Fitzsimmons, A; Denneau, L; Novakovic, B; Jedicke, R; Wainscoat, R. J; Armstrong, J. D; Duddy, S. R; Lowry, S. C; Trujillo, C. A; Micheli, M; Keane, J. V; Urban, L; Riesen, T; Meech, K. J; Abe, S; Cheng, Yu-Chi; Chen, Wen-Ping; Granvik, M; Grav, T; Ip, Wing-Huen; Kinoshita, D; Kleyna, J; Lacerda, P; Lister, T; Milani, A; Tholen, D. J; Vereš, P; Lisse, C. M; Kelley, M. S; Fernández, Y. R; Bhatt, B. C; Sahu, D. K; Kaiser, N; Chambers, K. C; Hodapp, K. W; Magnier, E. A; Price, P. A; Tonry, J. L (IOP Publishing, 2012-03-20)
    The main-belt asteroid (300163) 2006 VW139 (later designated P/2006 VW139) was discovered to exhibit comet-like activity by the Pan-STARRS1 (PS1) survey telescope using automated point-spread-function analyses performed ...
  • Early optical and millimeter observations of GRB 030226 afterglow 
    Pandey, S. B; Sagar, R; Anupama, G. C; Bhattacharya, D; Sahu, D. K; Castro-Tirado, A. J; Bremer, M (EDP Sciences, 2004-04)
    The CCD magnitudes in Johnson UBV and Cousins RI photometric passbands for the afterglow of the long duration GRB 030226 are presented. Upper limits of a few mJy to millimeter wave emission at the location of optical are ...
  • ESC observations of SN 2005cf – I. Photometric evolution of a normal Type Ia supernova 
    Pastorello, A; Taubenberger, V; Elias-Rosa, N; Mazzali, P. A; Pignata, G; Cappellaro, E; Garavini, G; Nobili, S; Anupama, G. C; Bayliss, D. D. R; Benetti, S; Bufano, F; Chakradhari, N. K; Kotak, R; Goobar, A; Navasardyan, H; Patat, F; Sahu, D. K; Salvo, M; Schmidt, B. P; Stanishev, V; Turatto, M; Hillebrandt, W (Blackwell Publishing, 2007-04)
    We present early-time optical and near-infrared photometry of supernova (SN) 2005cf. The observations, spanning a period from about 12 d before to 3 months after maximum, have been obtained through the coordination of ...
  • Estimates of precipitable water vapour from GPS data over the Indian subcontinent 
    Jade, S; Vijayan, M. S. M; Gaur, V. K; Prabhu, T. P; Sahu, S. C (Elsevier, 2005-04)
    Water vapour plays a dominant role in the high-energy thermodynamics of the atmosphere, notably, the genesis of storm systems. However, its distribution is difficult to resolve by conventional means, since water vapour ...
  • Evolution of emission line activity in intermediate mass young stars 
    Manoj, P; Bhatt, H. C; Maheswar, G; Muneer, S (American Astronomical Society, 2006-12-10)
    We present optical spectra of 45 intermediate-mass Herbig Ae/Be stars. Together with the multiepoch spectroscopic and photometric data compiled for a large sample of these stars and ages estimated for individual stars by ...
  • The Evolution of the Peculiar Type Ia Supernova SN 2005hk over 400 Days 
    Sahu, D. K; Tanaka, M; Anupama, G. C; Kawabata, K. S; Maeda, K; Tominaga, N; Nomoto, K; Mazzali, P. A; Prabhu, T. P (The American Astronomical Society, 2008-06-10)
    UBVRI photometry and medium-resolution optical spectroscopy of the peculiar Type Ia supernova SN 2005hk are presented and analyzed, covering the premaximum phase to around 400 days after explosion. The supernova is found ...
  • Exploring pre-main sequence variables of ONC: the new variables 
    Parihar, P. S; Messina, S; Distefano, E; Shantikumar, N. S; Medhi, B. J (Wiley Blackwell, 2009-07)
    Since 2004, we have been engaged in a long-term observing program to monitor young stellar objects in the Orion Nebula Cluster. We have collected about two thousands frames in V, R, and I broad-band filters on more than ...

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