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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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  • Photometric and spectroscopic evolution of supernova SN 2009an: another case of a transitional Type Ia event 
    Sahu, D. K; Anupama, G. C; Anto, P (Oxford University Press on behalf of the Royal Astronomical Society, 2013-04-01)
    We present optical UBVRI photometry and medium-resolution spectroscopy of a transitional Type Ia supernova, SN 2009an, over the period −6 to +150 d from the B maximum. With a Δm15(B) = 1.514 ± 0.132, SN 2009an declines ...
  • 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 ...
  • Photometric and spectroscopic study of a highly reddened type Ia supernova SN 2003hx in NGC 2076 
    Misra, K; Sahu, D. K; Anupama, G. C; Pandey, K (Royal Astronomical Society, 2008-09)
    We present UBVRI CCD photometry and optical spectra of the type Ia supernova SN 2003hx which appeared in the galaxy NGC 2076, obtained till ∼ 146 d after the epoch of B-band maximum. The supernova reached at maximum ...
  • 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 ...
  • 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 ...
  • Photometric study of type Ia supernova SN 2002hu 
    Sahu, D. K; Anupama, G. C (Astronomical Society of India, 2005-09)
  • Photometric study of type Ia supernova SN 2002hu 
    Sahu, D. K; Anupama, G. C; Prabhu, T. P (Blackwell Publishing, 2006-01)
    Optical UBVRI photometry of the type Ia supernova (SN Ia) SN 2002hu covering the period from −2 to +73 d since B maximum is presented. The supernova reached at maximum brightness in B on JD 245 2591.78 ± 0.5 with an apparent ...
  • 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 ...
  • Pre-main sequence stars, emission stars and recent star formation in the Cygnus region 
    Bhavya, B; Mathew, B; Subramaniam, A (Astronomical Society of India, 2007-09)
    The recent star formation history in the Cygnus region is studied using 5 clusters (IC 4996, NGC 6910, Berkeley 87, Biurakan 2 and Berkeley 86). The optical data from the literature are combined with the 2MASS data to ...
  • 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 ...
  • Properties of Newly Formed Dust Grains in the Luminous Type IIn Supernova 2010jl 
    Maeda, K; Nozawa, T; Sahu, D. K; Minowa, Y; Motohara, K; Ueno, I; Folatelli, G; Pyo, T. S; Kitagawa, Y; Kawabata, K. S; Anupama, G. C; Kozasa, T; Moriya, T. J; Yamanaka, M; Nomoto, K; Bersten, M; Quimby, R; Iye, M (IOP Publishing, 2013-10-10)
    Supernovae (SNe) have been proposed to be the main production sites of dust grains in the universe. However, our knowledge of their importance to dust production is limited by observationally poor constraints on the nature ...
  • Radio, millimeter and optical monitoring of GRB 030329 afterglow: constraining the double jet model 
    Resmi, L; Ishwara-Chandra, C. H; Castro-Tirado, A. J; Bhattacharya, D; Rao, A. P; Bremer, M; Pandey, S. B; Sahu, D. K; Bhatt, B. C; Sagar, R; Anupama, G. C; Subramaniam, A; Lundgren, A; Gorosabel, J; Guziy, S; de Ugarte Postigo, A; Castro Cerón, J. M; Wiklind, T (EDP Sciences, 2005-09)
    We present radio, millimeter and optical observations of the afterglow of GRB 030329. $UBVR_{\rm C}I_{\rm C}$ photometry is presented for a period of 3 h to 34 days after the burst. Radio monitoring at 1280 MHz has been ...
  • Rapid optical variability of TeV blazars 
    Gopal-Krishna; Goyal, A; Joshi, S; Karthick, C; Sagar, R; Wiita, P. J; Anupama, G. C; Sahu, D. K (Wiley-Blackwell, 2011-09)
    In this first systematic attempt to characterize the intranight optical variability (INOV) of TeV-detected blazars, we have monitored a well-defined set of nine TeV blazars on total 26 nights during 2004–10. In this R- or ...
  • The Rapidly Flaring Afterglow of the Very Bright and Energetic GRB 070125 
    Updike, A. C; Haislip, J. B; Nysewander, M. C; Fruchter, A. S; Kann, D. A; Klose, S; Milne, P. A; Williams, G. G; Zheng, W; Hergenrother, C. W; Prochaska, J. X; Prochaska, J. X; Mirabal, N; Thorstensen, J. R; van der Horst, A. J; Starling, R. L. C; Racusin, J. L; Burrows, D. N; Kuin, N. P. M; Roming, P. W. A; Bellm, E; Hurley, K; Li, W; Filippenko, A. V; Blake, C; Starr, D; Falco, E. E; Brown, W. R; Dai, X; Deng, J; Xin, L; Qiu, Y; Wei, J; Urata, Y; Nanni, D; Palazzi, E; Greco, G; Bartolini, C; Guarnieri, A; Piccioni, A; Pizzichini, G; Terra, F; Misra, K; Bhatt, B. C; Anupama, G. C; Fan, X; Jiang, L; Wijers, R. A. M. J; Reichart, D. E; Eid, H. A; Bryngelson, G; Puls, J; Goldthwaite, R. C; Hartmann, D. H (The American Astronomical Society, 2008-09)
    We report on multiwavelength observations, ranging from X-ray to radio wave bands, of the IPN-localized gamma-ray burst GRB 070125. Spectroscopic observations reveal the presence of absorption lines due to O I, Si II, and ...
  • Results from a spectroscopic survey in the CoRoT fields. I. Search for chromospherically active stars 
    Medhi, B. J; Messina, S; Parihar, P. S; Pagano, I; Muneer, S; Duorah, K (EDP Sciences, 2007-07)
    Aims.In this paper we report the results of the spectroscopic survey we carried out to detect chromospheric activity of late-type stars in the fields of view of the CoRoT space mission. Methods.We give an accurate MK ...
  • RS Ophiuchi: radio lightcurve development following the 2006 outburst 
    Eyres, S. P. S; Rushton, M; O'Brien, T. J; Beswick, R; Muxlow, T. W. B; Davis, R; Anupama, G. C; Kantharia, N. G; Bode, M; Gawroñski, M. P; Feiler, R; Evans, A (Astronomical Society of a Pacific, 2009-01)
    We report GHz observations beginning 4.5 days after the discovery of RS Ophiuchi undergoing its 2006 recurrent nova outburst. Observations over the first 60 days are included, enabling us to follow spectral development ...
  • SDSS J123813.73-033933.0: a cataclysmic variable evolved beyond the period minimum 
    Aviles, A; Zharikov, S; Tovmassian, G; Michel, R; Tapia, M; Roth, M; Neustroev, V; Zurita, C; Andreev, M; Sergeev, A; Pavlenko, E; Tsymbal, V; Anupama, G. C; Kamath, U. S; Sahu, D. K (Institute of Physics, 2010-03)
    We present infrared JHK photometry of the cataclysmic variable (CV) SDSS J123813.73 – 033933.0 and analyze it along with optical spectroscopy, demonstrating that the binary system is most probably comprised of a massive ...
  • Site characteristics of The Indian Astronomical Observatory, Hanle 
    Bhatt, B. C; Prabhu, T. P; Anupama, G. C (Astronomical Society of India, 2000)
    A brief summary of site characteristics of Indian Astronomical Observatory, Hanle, Ladakh (altitude 4500 m), is presented based on a survey being carried out since the last four years.
  • SN 2002ap, the Hypernova of Class Ic 
    Pandey, S. B; Sahu, D. K; Anupama, G. C; Bhattacharya, D; Sagar, R (Astronomical Society of India, 2003)
    The supernova SN 2002ap was discovered in the outer regions of the nearby spiral M74 on January 29.4 UT. Early photometric and spectroscopic observations indicate the supernova belongs to the class of Ic hypernova. Late ...
  • Spectroscopic survey of ASAS eclipsing variables: search for chromospherically active eclipsing binary stars - I 
    Parihar, P. S; Messina, S; Bama, P; Medhi, B. J; Muneer, S; Velu, C; Ahmad, A (Royal Astronomical Society, 2009-05)
    We have started a spectroscopic survey to identify new chromospherically active components and low-mass pre-main sequence (PMS) stars in recently discovered All Sky Automated Survey (ASAS) eclipsing binaries. In this paper, ...

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