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Browsing by Author "Anupama, G. C"

Browsing by Author "Anupama, G. C"

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  • A 10-m class national large optical-IR telescope 
    Anupama, G. C; Maheswar, G; Sriram, S; Sivarani, T; Parihar, P. S; Nagabhushana, S; Angchuk, D; Barway, Sudhanshu; Bhatt, B. C; Banyal, R. K; Basheer, Alikhan; Prasanna, Deshmukh; Divakar, D. K; Dorjai, T; Goswami, A; Govinda, K. V; Jorphail, S; Kamath, U. S; Kemkar, P. M. M; Mahay, T. T; Muneer, S; Muthumariappan, C; Shantikumar, N. S; Pandey, G; Reddy, B. E; Sahu, D. K; Sandeep, D. S; Ramya, S; Stalin, C. S; Subramanian, S; Tsewang, Stanzin; Subramaniam, A (Indian Academy of Science, 2022-06)
    An observatory class national large optical-IR telescope (NLOT), is proposed to be built and located in the country. The telescope consists of a 10–12 m segmented primary. In order to cater to a diversity of observational ...
  • The 1985 outburst of RS Ophiuchi - Spectroscopic results 
    Anupama, G. C; Prabhu, T. P (Indian Academy of Sciences, 1989-09)
    Results are reported from visual spectroscopy of the recurrent nova RS Oph, obtained with a Cassegrain spectrograph on the 102-cm reflector at Vainu Bappu Observatory in February-May 1985 (days 32-108 postoutburst). The ...
  • The 1999 Outburst of the Recurrent Nova U Scorpii 
    Anupama, G. C; Dewangan, G. C (The American Astronomical Society, 2000-03)
    The optical spectra of the recurrent nova U Sco obtained in five epochs 0.45-42.35 days after the 1999 outburst maximum are presented here. For the first time, an outburst spectrum of U Sco has been obtained as early as ...
  • The 2002 Outburst of the Recurrent Nova IM Normae 
    Anupama, G. C (Astronomical Society of India, 2003)
  • The 2010 outburst and pre-outburst optical spectrum of the recurrent nova U Scorpii 
    Anupama, G. C; Kamath, U. S; Ramaprakash, A. N; Kantharia, N. G; Hegde, M; Mohan, V; Kulkarni, M; Bode, M. F; Eyres, S. P. S; Evans, A; O Brien, T. J (EDP Sciences, 2013-11)
    Aims. We study the evolution of the recurrent nova U Scorpii during its outburst in 2010. Methods. Optical spectroscopic observations of the nova were obtained during 0.83–162.5 days after outburst maximum. Optical ...
  • Active nucleus in a post-starburst galaxy: KUG 1259+280 
    Dewangan, G. C; Singh, K. P; Mayya, Y. D; Anupama, G. C (The Royal Astronomical Society, 2000-10)
    We report the discovery of an active nucleus in a post-starburst galaxy, KUG 1259+280, based on its X-ray and optical characteristics. The X-ray source in KUG 1259+280 was detected during a search for ultrasoft sources in ...
  • Analysis of polarization introduced due to the telescope optics of the Thirty Meter Telescope 
    Ramya, M. Anche; Sen, A; Anupama, G. C; Sankarasubramanian, K; Skidmore, W (SPIE-The International Society for Optical Engineering, 2018-01)
    An analytical model has been developed to estimate the polarization effects, such as instrumental polarization (IP), crosstalk (CT), and depolarization, due to the optics of the Thirty Meter Telescope. These are estimated ...
  • ASASSN-14dq: A fast-declining type II-P Supernova in a low-luminosity host galaxy 
    Singh, A; Srivastav, S; Brajesh Kumar; Anupama, G. C; Sahu, D. K (Oxford University Press on behalf of the Royal Astronomical Society, 2018-10)
    Optical broadband (UBVRI) photometric and low-resolution spectroscopic observations of the Type II-P supernova (SN) ASASSN-14dq are presented. ASASSN-14dq exploded in a low-luminosity/metallicity host galaxy UGC 11860, the ...
  • ASASSN-16fp (SN 2016coi): A Transitional Supernova between Type Ic And Broad-Lined Ic 
    Brajesh Kumar; Singh, A; Srivastav, S; Sahu, D. K; Anupama, G. C (Oxford University Press on behalf of the Royal Astronomical Society, 2018-01)
    We present results based on a well-sampled optical ( UBVRI ) and ultraviolet ( Swift /UVOT) imaging, and low-resolution optical spectroscopic follow-up observations of the nearby Type Ic supernova (SN) ASASSN-16fp ...
  • Astreaks: astrometry of NEOs with trailed background stars 
    Sharma, Kritti; Kumar, Harsh; Choudhary, Harsh; Bhalerao, Varun; Swain, Vishwajeet; Bolin, Bryce; Anupama, G. C; Barway, Sudhanshu; Joharle, Simran; Shenoy, Vedant (Oxford University Press on behalf of Royal Astronomical Society, 2023-09)
    The detection and accurate astrometry of fast-moving near-Earth objects (NEOs) has been a challenge for the follow-up community. Their fast apparent motion results in streaks in sidereal images, thus affecting the telescope’s ...
  • AstroSat soft X-ray observations of the symbiotic recurrent nova V3890 Sgr during its 2019 outburst 
    Singh, K. P; Girish, V; Pavana, M; Ness, J.-U; Anupama, G. C; Orio, M (Oxford University Press on behalf of the Royal Astronomical Society, 2021-02)
    Two long AstroSat Soft X-ray Telescope observations were taken of the third recorded outburst of the symbiotic recurrent nova V3890 Sgr. The first observing run, 8.1–9.9 d after the outburst, initially showed a stable ...
  • AT2020ohl: its nature and probable implications 
    Roy, Rupak; Mandal, Samir; Sahu, D. K; Anupama, G. C; Nandi, Sumana; Kumar, Brijesh (Oxford University Press on behalf of Royal Astronomical Society., 2024-03)
    ASASSN-20hx, a.k.a AT2020ohl, is an ambiguous nuclear transient, which was discovered in the nearby galaxy NGC6297 by the All-Sky Automated Survey for Supernovae. We have investigated the evolution of AT2020ohl using a ...
  • An automated extinction and sky brightness monitor for the Indian Astronomical Observatory, Hanle 
    Sharma, T. K; Parihar, P. S; Banyal, R. K; Ahmad Dar, Ajaz; Kemkar, P. M. M; Stanzin, U; Anupama, G. C (Oxford University Press on behalf of the Royal Astronomical Society, 2017-08)
    We have developed a simple and portable device that makes precise and automated measurements of night sky extinction. Our instrument uses a commercially available telephoto lens for light collection, which is retrofitted ...
  • Big science in India 
    Anupama, G. C; Subhasis, Chattopadhyay; Deshpande, Shishir; Ghosh, Joydeep; Godbol, Rohini M; Indumathi, D; Souradeep, Tarun (Nature Publishing Group, 2021-11)
    Current and future big science projects in India are providing opportunities for young researchers and building technological capabilities, while contributing to new scientific discoveries. Seven scientists involved in ...
  • Black holes are in sight - Nobel in physics 2020 
    Anupama, G. C (Indian Physics Association, 2020-10)
    The Nobel Prize in Physics 2020 has been awarded to three scientists. One half of the prize was awarded to Roger Penrose and the other half was jointly awarded to Reinhard Genzel and Andrea Ghez. Penrose’s discovery of ...
  • Breaking the Habit: The Peculiar 2016 Eruption of the Unique Recurrent Nova M31N 2008-12a 
    Henze, M; Darnley, M. J; Williams, S. C; Kato, M; Hachisu, I; Anupama, G. C; Arai, A; Boyd, D; Burke, D; Ciardullo, R; Chinetti, K; Cook, L. M; Cook, M. J; Erdman, P; Gao, X; Harris, B; Hartmann, D. H; Hornoch, K; Chuck Horst, J; Hounsel, R; Husar, D; Itagaki, K; Kabashima, F; Kafka, S; Kaur, A; Kiyota, S; Kojiguchi, N; Kučáková, H; Kuramoto, K; Maehara, H; Mantero, A; Masci, F. J; Matsumoto, K; Naito, H; Ness, J. U; Nishiyama, K; Oksanen, A; Osborne, J. P; Page, K. L; Paunzen, E; Pavana, M; Pickard, R; Prieto-Arranz, J; Rodríguez-Gil, P; Sala, G; Sano, Y; Shafter, A. W; Sugiura, Y; Tan, H; Tordai, T; Vraštil, J; Wagner, R. M; Watanabe, F; Williams, B. F; Bode, M. F; Bruno, A; Buchheim, B; Crawford, T; Goff, B; Hernanz, M; Igarashi, A. S; José, J; Motta, M; O’Brien, T. J; Oswalt, T; Poyner, G; Ribeiro, V. A. R. M; Sabo, R; Shara, M.M; Shears, J; Starkey, D; Starrfield, S; Woodward, C. E (IOP Publishing, 2018-04-10)
    which is the most promising candidate for the single-degenerate progenitor of a Type Ia supernova known to date. The previous three eruptions of M31N 2008-12a have displayed remarkably homogeneous multiwavelength properties: ...
  • Breaking the habit: the peculiar 2016 eruption of the unique recurrent nova M31N 2008-12a 
    Henze, M; Darnley, M. J; Williams, S. C; Kato, M M; Hachisu, I; Anupama, G. C; Arai, A; Boyd, D; Burke, D; Ciardullo, R; Chinetti, K; Cook, L. M; Cook, M. J; Erdman, P; Gao, X; Harris, B; Hartmann, D. H; Hornoch, K; Chuck Horst, J; Hounsel, R; Husar, D; Itagaki, K; Kabashima, F; Kafka, S; Kaur, A; Kiyota, S; Kojiguchi, N; Kucakova, H; Kuramoto, K; Maehara, H; Mantero, A; Masci, F. J; Matsumoto, K; Naito, H; Ness, J.-U; Nishiyama, K; Oksanen, A; Osborne, J. P; Page, K. L; Paunzen, E; Pavana, M; Pickard, R; Prieto-Arranz, J; Rodri­guez-Gil, P; Sala, G; Sano, Y; Shafter, A. W; Sugiura, Y; Tan, H; Tordai, T; Vrastil, J; 22 others (IOP Publishing, 2018-04-10)
    Since its discovery in 2008, the Andromeda galaxy nova M31N 2008-12a has been observed in eruption every single year. This unprecedented frequency indicates an extreme object, with a massive white dwarf and a high accretion ...
  • 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 ...
  • Broad-line Type Ic supernova SN 2014ad 
    Sahu, D. K; Anupama, G. C; Chakradhari, N. K; Srivastav, S; Tanaka, M; Maeda, K; Nomoto, K (Oxford University Press on behalf of the Royal Astronomical Society, 2018-04)
    We present optical and ultraviolet photometry and low-resolution optical spectroscopy of the broad-line Type Ic supernova SN 2014ad in the galaxy PGC 37625 (Mrk 1309), covering the evolution of the supernova during −5 to ...
  • BVRI photometry of the Dipper Asterism region in M 67 
    Anupama, G. C; Kembhavi, A. K; Prabhu, T. P; Singh, K. P; Bhat, P. N (European Southern Observatory, 1995-02)
    We present Cousins BVRI magnitudes for stars in the M 67 `dipper asterism' region, based on observations carried out at the prime focus of the 2.3 m Vainu Bappu Telescope of the Vainu Bappu Observatory, Kavalur. The ...

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