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Browsing by Author "Anupama, G. C"

Browsing by Author "Anupama, G. C"

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  • Prototype segmented mirror telescope: a pathfinder of India's large optical-NIR telescope project 
    Parihar, P; Prasanna, Deshmukh; Jacob, A; Varun, Kumar; Goudar, Abhishek; Sriram, S; Nagabhusan, S; Amit Kumar, S; Govinda, K. V.; Sandeep, D. S.; Kemkar, P. M. M; Anupama, G. C (SPIE--The International Society for Optical Engineering, 2018-07)
    To cater the need of growing astronomical community of India, there is a proposal to install 10-12m size optical-NIR telescope, equipped with state of the art back-end instruments . A telescope of this size is possible ...
  • Radio Evolution of a Type IIb Supernova SN 2016gkg 
    Nayana, A. J; Chandra, Poonam; Krishna, Anoop; Anupama, G. C (American Astronomical Society, 2022-08-01)
    We present extensive radio monitoring of a Type IIb supernova (SN IIb), SN 2016gkg during t ∼ 8−1429 days postexplosion at frequencies ν ∼ 0.33−25 GHz. The detailed radio light curves and spectra are broadly consistent with ...
  • 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 ...
  • Real-time discovery of AT2020xnd: a fast, luminous ultraviolet transient with minimal radioactive ejecta 
    Perley, Daniel A; Ho, Anna Y. Q; Yao, Yuhan; Fremling, Christoffer; Anderson, Joseph P; Schulze, Steve; Kumar, Harsh; Anupama, G. C; Barway, Sudhanshu; Bellm, Eric C; Bhalerao, Varun; Chen, Ting-Wan; Duev, Dmitry A; Galbany, Llu´ıs; Graham, Matthew J; Gromadzk, Mariusz; Gutierrez, Claudia P; Ihanec, Nada; Inserra, Cosimo; Kasliwal, Mansi M; Kool, Erik C; Kulkarni, S. R; Laher, Russ R; Masci, Frank J; Neill, James D; Nicholl, Matt; Pursiainen, Miika; Roestel, Joannes van; Sharma, Yashvi; Sollerman, Jesper; Walters, Richard; Wiseman, Philip (Oxford University Press on behalf of Royal Astronomical Society, 2021-12)
    The many unusual properties of the enigmatic AT2018cow suggested that at least some subset of the empirical class of fast blue optical transients (FBOTs) represents a genuinely new astrophysical phenomenon. Unfortunately, ...
  • The recurrent nova class of objects 
    Anupama, G. C (Astronomical Society of the Pacific, 2008)
    Recurrent novae (RNe) form a small, but heterogeneous class of cataclysmic variables that have more than one recorded outburst. There are ten known members of this class, with six short period binaries similar to classical ...
  • The recurrent novae and their relation with classical novae 
    Anupama, G. C (American Institute of Physics, 2002)
    Recurrent novae (RNe) are a subclass of cataclysmic variables classified based on recorded observations of more than one nova outburst. They form a small, but heterogeneous group of objects, with 10 known members, that ...
  • Recurrent novae at quiescence: systems with giant secondaries 
    Anupama, G. C; Mikołajewska, J (European Southern Observatory, 1999-04)
    Spectroscopic and photometric behaviour of the class of recurrent novae with giant secondaries (T Coronae Borealis, RS Ophiuchi, V3890 Sagittarii and V745 Scorpii) at quiescence are presented in this study. The hot component ...
  • Recurrent novae: Single degenerate progenitors of Type Ia supernovae 
    Anupama, G. C; Pavana, M (Springer, 2020-12)
    Type Ia supernovae are the result of explosive thermonuclear burning in CO white dwarfs. The progenitors of the Ia supernovae are white dwarfs in an interacting binary system. The donor companion is either a degenerate ...
  • Recurrent Novae: What Do We Know about Them? 
    Anupama, G. C (Cambridge University Press, 2013-01)
    Recurrent novae (RNe) belong to the group of cataclysmic variables that exhibit nova outbursts at intervals on the order of decades. They are rare, with 10 Galactic RNe known to date. Two are known in the LMC, while there ...
  • Respect - software for reduction of spectroscopic data 
    Anupama, G. C; Prabhu, T. P; Giridhar, S (Tata Institute of Fundamental Research, 1988)
    We describe the interactive software package RESPECT developed for reductions of astronomical spectroscopic data at the Vainu Bappu Observatory, Kavalur. Each command of RESPECT performs a simple operation on a one-dimensional ...
  • Respect - Software Package for Reduction of Astronomical Spectra 
    Prabhu, T. P; Anupama, G. C; Giridhar, S (Astronomical Society of Indian, 1987)
    The interactive software package RESPECT developed for reducing astronomical spectroscopic data at Vainu Bappu Observatory (VBO), Kavalur, is described. Each command of RESPECT performs a simple operation on a one-dimensional ...
  • A road map for the generation of a near-infrared guide star catalog for thirty meter telescope observations 
    Subramanian, S; Subramaniam, A; Sivarani, T; Simard, Luc; Anupama, G. C; Gillies, Kim; Ramaprakash, A. N; Reddy, B. E (Indian Academy of Sciences, 2016-09)
    The near-infrared instruments in the upcoming Thirty Meter Telescope (TMT) will be assisted by a multi conjugate Adaptive Optics (AO) system. For the efficient operation of the AO system, during observations, a near-infrared ...
  • RS Ophiuchi 
    Anupama, G. C; Kantharia, N. G (Central Bureau for Astronomical Telegrams, 2006-03)
  • 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 ...
  • Science with Indian Astronomical Observatory, Hanle 
    Prabhu, T. P; Anupama, G. C (Astronomical Society of India, 2010)
    Indian Astronomical 0 bserva,tory, Hanle, is the high altitude (4500 in above msl) observat.ory operated by the Indian Institute of Astrophysics, Bangalore. The 2-m Himalayan Chandra Telescope (HCT) inst.alled in the ...
  • 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 ...
  • A Sensitive Search for Supernova Emission Associated with the Extremely Energetic and Nearby GRB 221009A 
    Srinivasaragavan, Gokul P; O'Connor, Brendan; Bradley Cenko, S; Dittmann, Alexander J; Yang, Sheng; Sollerman, Jesper; Anupama, G. C; Barway, Sudhanshu; Bhalerao, Varun; Kumar, Harsh; Swain, Vishwajeet; Hammerstein, Erica; Holt, Isiah; Anand, Shreya; Andreoni, Igor; Coughlin, Michael W; Dichiara, Simone; Gal-Yam, Avishay; Coleman Miller, M; Soon, Jaime; Soria, Roberto; Durbak, Joseph; Gillanders, James H; Laha, Sibasish; Moore, Anna M; Ragosta, Fabio; Troja, Eleonora (American Astronomical Society, 2023-06-01)
    We report observations of the optical counterpart of the long gamma-ray burst GRB 221009A. Due to the extreme rarity of being both nearby (z = 0.151) and highly energetic (Eγ,iso 1054 erg), GRB 221009A offers a unique ...
  • Shock-driven synchrotron radio emission from the 2021 outburst of RS Ophiuchi 
    Nayana, A. J; Anupama, G. C; Roy, Nirupam; Banerjee, Dipankar P. K; Singh, Kulinder Pal; Sonith, L. S; Kamath, U. S (Oxford University Press on behalf of Royal Astronomical Society, 2024-03)
    We present low-frequency radio observations of the Galactic symbiotic recurrent nova RS Ophiuchi during its 2021 outburst. The observations were carried out with the upgraded Giant Metrewave Radio Telescope spanning a ...

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