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Browsing Publications based on data from IAO, Hanle by Issue Date

Browsing Publications based on data from IAO, Hanle by Issue Date

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  • Post-outburst phase of McNeil's nebula (V1647 Orionis) 
    Ojha, D. K; Ghosh, S. K; Tej, A; Verma, R. P; Vig, S; Anupama, G. C; Sahu, D. K; Parihar, P. S; Bhatt, B. C; Prabhu, T. P; Maheswar, G; Bhatt, H. C; Anandarao, B. G; Venkataraman, V (Blackwell Publishing, 2006-03)
    We present a detailed study of the post-outburst phase of McNeil's nebula (V1647 Orionis) using optical B, V, R, I and near-infrared (NIR) J, H, K photometric and low-resolution optical spectroscopic observations. The ...
  • The latest two GRB detected by Hete-2: GRB 051022 and GRB 051028 
    Castro-Tirado, A. J; McBreen, S; Jelínek, M; Pandey, S. B; Bremer, M; de Ugarte Postigo, A; Gorosabel, J; Guziy, S; Bihain, G; Caballero, J. A; Ferrero, P; de Jong, J; Misra, K; Sahu, D. K (American Institute of Physics, 2006-05)
    We present multiwavelength observations of the latest two GRB detected by Hete-2 in 2005. For GRB 051022, no optical/nIR afterglow has been detected, in spite of the strong gamma-ray emission and the reported X-ray afterglow ...
  • NGC 7419: a young open cluster with a number of very young intermediate mass pre-MS stars 
    Subramaniam, A; Mathew, B; Bhatt, B. C; Ramya, S (Blackwell Publishing, 2006-06)
    We present a photometric and spectroscopic study of the young open cluster NGC 7419, which is known to host a large number of classical Be stars for reasons not well understood. Based on CCD photometric observations of 327 ...
  • A high-resolution spectral analysis of three carbon-enhanced metal-poor stars 
    Goswami, A; Aoki, W; Beers, T. C; Christlieb, N; Norris, J. E; Ryan, S. G; Tsangarides, S (Blackwell Publishing, 2006-09)
    We present results of an analysis of high-resolution spectra obtained with the Subaru Telescope High Dispersion Spectrograph, of two Carbon-Enhanced Metal-Poor stars, HE 1305+0007 and HE 1152-0355, and of the classical CH ...
  • Fundamental parameters of six neglected old open clusters 
    Carraro, G; Subramaniam, A; Janes, K. A (Royal Astronomical Society, 2006-09)
    In this paper, we present the first BV I CCD photometry of six overlooked old open clusters (Berkeley 44, NGC 6827, Berkeley 52, Berkeley 56, Skiff 1 and Berkeley 5) and derive estimates of their fundamental parameters by ...
  • Photometric and spectroscopic evolution of the Type IIP supernova SN 2004et 
    Sahu, D. K; Anupama, G. C; Srividya, S; Muneer, S (Blackwell Publishing, 2006-09)
    We present optical photometry and spectroscopy of the Type IIP supernova SN 2004et that occurred in the nearby galaxy NGC 6946. The observations span a time range of 8–541 d after explosion. The late time bolometric ...
  • GRB 051028: an intrinsically faint gamma-ray burst at high redshift? 
    Castro-Tirado, A. J; Jelínek, M; Pandey, S. B; McBreen, S; de Jong, J; Sahu, D. K; Ferrero, P; Caballero, J. A; Gorosabel, J; Kann, D. A; Klose, S; de Ugarte Postigo, A; Anupama, G. C; Gry, C; Guziy, S; Srividya, S; Valdivielso, L; Vanniarajan, S; Henden, A. A (EDP Sciences, 2006-12)
    We present multiwavelength observations of the gamma-ray burst GRB 051028 detected by HETE-2 in order to derive its afterglow emission parameters and to determine the reason for its optical faintness when compared to other ...
  • Multi-wavelength afterglow observations of the high redshift GRB 050730 
    Pandey, S. B; Castro-Tirado, A. J; McBreen, S; Pérez-Ramírez, M. D; Bremer, M; Guerrero, M. A; Sota, A; Cobb, B. E; Jelínek, M; de Ugarte Postigo, A; Gorosabel, J; Guziy, S; Guidorzi, C; Bailyn, C. D; Muñoz-Darias, T; Gomboc, A; Monfardini, A; Mundell, C. G; Tanvir, N; Levan, A. J; Bhatt, B. C; Sahu, D. K; Sharma, S; Bogdanov, O; Combi, J. A (EDP Sciences, 2006-12)
    Context.GRB 050730 is a long duration high-redshift burst (z=3.967) that was discovered by Swift. The afterglow shows variability and was well monitored over a wide wavelength range. We present comprehensive temporal and ...
  • 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 ...
  • Near-infrared JH photometry of young open cluster Be 59 
    Sharma, S; Ogura, K; Pandey, A. K; Ojha, D. K; Bhatt, B. C (Astronomical Society of India, 2007)
    We present near-infrared J H photometry and optical slitless spectroscopy of stars in the field of the young cluster Be 59. The J /(J- H )colour-magnitude diagram of the cluster yields a distance modulus of (m - M )0= 10.0 ...
  • Properties of dust in early-type galaxies 
    Patil, M. K; Pandey, S. K; Sahu, D. K; Kembhavi, A (EDP Sciences, 2007-01)
    We report optical extinction properties of dust for a sample of 26 early-type galaxies based on the analysis of their multicolour CCD observations. The wavelength dependence of dust extinction for these galaxies is determined ...
  • Age Sequence in Small Clusters Associated with Bright-Rimmed Clouds 
    Ogura, K; Chauhan, N; Pandey, A. K; Bhatt, B. C; Ojha, D; Itoh, Y (Astronomical Society of Japan, 2007-02)
    Bright-rimmed clouds (BRCs) found in HII regions are probable sites of triggered star formation due to compression by ionization/shock fronts, and it is hypothesized that star formation proceeds from the exciting star(s) ...
  • Optical observations of GRB 060124 afterglow: a case for an injection break 
    Misra, K; Bhattacharya, D; Sahu, D. K; Sagar, R; Anupama, G. C; Castro-Tirado, A. J; Guziy, S. S; Bhatt, B. C (EDP Sciences, 2007-03)
    Aims.We present broad band optical afterglow observations of a long duration GRB 060124 using the 1.04-m Sampurnanand Telescope at ARIES, Nainital and the 2.01-m HCT at IAO, Hanle, including the earliest ground-based ...
  • Hubble Space Telescope and Optical Observations of Three Pulsating Accreting White Dwarfs in Cataclysmic Variables 
    Szkody, P; Mukadam, A; Gänsicke, B. T; Woudt, P. A; Solheim, Jan - Erik; Nitta, A; Sion, E. M; Warner, B; Sahu, D. K; Prabhu, T. P; Henden, A (University of Chicago Press, 2007-04)
    Ultraviolet observations using the Solar Blind Channel on the Hubble Space Telescope provide light curves and low-resolution spectra of three pulsating white dwarfs in the cataclysmic variables SDSS J013132.39−090122.3, ...
  • Observational evidence of optical variability in L dwarfs 
    Maiti, M (The American Astronomical Society, 2007-04)
    The results of quasi-simultaneous continuous monitoring of six L dwarfs in the R and I bands are presented. A careful analysis of the data shows that the object 2MASSW J0036+1821 is variable in the I and R bands. The ...
  • Hubble Space Telescope and Optical Observations of Three Pulsating Accreting White Dwarfs in Cataclysmic Variables 
    Szkody, P; Mukadam, A; Gänsicke, B. T; Woudt, P. A; Solheim, Jan-Erik; Nitta, A; Sion, E. M; Warner, B; Sahu, D. K; Prabhu, T. P; Henden, A (American Astronomical Society, 2007-04)
    Ultraviolet observations using the Solar Blind Channel on the Hubble Space Telescope provide light curves and low-resolution spectra of three pulsating white dwarfs in the cataclysmic variables SDSS J013132.39-090122.3, ...
  • Photometric study of distant open clusters in the second quadrant: NGC 7245, King 9, King 13 and IC 166 
    Subramaniam, A; Bhatt, B. C (Royal Astronomical Society, 2007-04)
    We present a UBV CCD photometric study of four open clusters, NGC 7245, King 9, IC 166 and King 13, located between l = 90° and 135°. All are embedded in a rich Galactic field. NGC 7245 and King 9 are close together in the ...
  • 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 ...
  • Photometric study of distant open clusters in the second quadrant: NGC 7245, King 9, King 13 and IC 166 
    Subramaniam, A; Bhatt, B. C (Blackwell Publishing, 2007-05)
    We present a UBV CCD photometric study of four open clusters, NGC 7245, King 9, IC 166 and King 13, located between l = 90° and 135°. All are embedded in a rich Galactic field. NGC 7245 and King 9 are close together in the ...
  • Further evidence for intra-night optical variability of radio-quiet quasars 
    Goyal, Arti; Gopal-Krishna; Sagar, R; Anupama, G. C; Sahu, D. K (Astronomical Society of India, 2007-06)
    Although well established for BL Lac objects and radio-loud quasars, the occurrence of intra-night optical variability (INOV) in radio-quiet quasars is still debated, primarily since only a handful of INOV events with good ...

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