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  • Optical observations of the bright long duration peculiar GRB 021004 afterglow. 
    Pandey, S. B; Sahu, D. K; Resmi, L; Sagar, R; Anupama, G. C; Bhattacharya, D; Mohan, V; Prabhu, T. P; Bhatt, B. C; Pandey, J. C; Parihar, P. S; Castro-Tirado, A. J (Astronomical Society of India, 2003)
    The CCD magnitudes in Johnson B,V and Cousins R and I photometric passbands are determined for the bright long duration GRB 021004 afterglow from 2002 October 4 to 16 starting ~ 3 hours after the γ - ray burst. Light curves ...
  • Optical observations of the fast declining Type Ib supernova iPTF13bvn 
    Srivastav, S; Anupama, G. C; Sahu, D. K (Oxford University Press on behalf of the Royal Astronomical Society, 2014-12-01)
    We present optical UBVRI photometry and medium resolution spectroscopy of the Type Ib supernova iPTF13bvn, spanning a phase of ∼−13 d to +71 d with respect to B-band maximum. The post-maximum decline rates indicate a fast ...
  • Optical observations of the Sun 
    Bhatnagar, A (Indian Institute of Astrophysics, Bangalore, 1988)
  • Optical Phase Conjugation in Iodine Solutions 
    Vijaya, R; Murti, Y. V. G. S; Sundararajan, G; Prasada Rao, T. A (Indian Institute of Astrophysics, Bangalore, 1991)
    Results of experimental investigations on the optical phase conjugation in iodine solutions are reported in this paper. Degenerate four wave mixing is performed at two different wavelengths - one within the resonant regime ...
  • Optical Photometric and Polari metric investigation of NGC 1931 
    Pandey, A. K; Eswaraiah, C; Sharma, S; Samal, M. R; Chauhan, N; Chen, W. P; Jose, J; Ojha, D. K; Yadav, Ram Kesh; Chandola, H. C (IOP Publishing, 2013-02-05)
    We present optical photometric and polarimetric observations of stars toward NGC 1931 with the aim of deriving cluster parameters such as distance, reddening, age, and luminosity/mass function as well as understanding dust ...
  • The optical photometric and spectroscopic investigation of type IIP supernova 2012A 
    Roy, R; Sutaria, F. K; Bose, S; Johnson, S; Dwarkadas, V; York, B; Kumar, B; Kumar, B; Bhatt, V. K; Chakraborti, S; York, D; Ritchey, A; Saurage, G; Kaiser, M B (Cambridge University Press, 2014-01)
    Supernova 2012A was discovered on 7.39UT, January, 2012 in the nearby galaxy NGC 3239 at an unfiltered magnitude of 14.6 and classified spectroscopically as a Type IIP event. Here, we present the optical photometric and ...
  • Optical photometry and basic parameters of 10 unstudied open clusters 
    Subramaniam, A; Carraro, G; Janes, K. A (Blackwell Publishing, 2010-05)
    We present BVI CCD photometry of 10 northern open clusters, Berkeley43, Berkeley45, Berkeley47, NGC 6846, Berkeley49, Berkeley51, Berkeley89, Berkeley91, Tombaugh4 and Berkeley9, and estimate their fundamental parameters. ...
  • Optical photometry and spectroscopy of the Type Ibn supernova SN 2006jc until the onset of dust formation 
    Anupama, G. C; Sahu, D. K; Gurugubelli, U. K; Prabhu, T. P; Tominaga, N; Tanaka, M; Nomoto, K (Royal Astronomical Society, 2009-01)
    We present optical UBVRI photometric and spectroscopic data of the Type Ibn supernova SN 2006jc, until the onset of the dust-forming phase. The optical spectrum shows a blue continuum and is dominated by the presence of ...
  • Optical photometry of the GRB 010222 afterglow 
    Cowsik, R; Prabhu, T. P; Anupama, G. C; Bhatt, B. C; Sahu, D. K; Ambika, S; Padmakar; Bhargavi, S. G (Astronomical Society of India, 2001)
    The optical afterglow of GRB 010222 was observed using the recently installed 2-m telescope at the Indian Astronomical Observatory, Hanle, and the telescopes at the Vainu Bappu Observatory, Kavalur, beginning ~ 0.6 day ...
  • Optical polishing for development of highly specular sunshield for radiant coolers of meteorological satellites of ISRO 
    Madhu Prasad; Saxena, A. K (Indian Space Research Organisation, ISRO Satellite Centre, 2010-01-22)
    Radiant cooler is used to cool the infrared and water vapour detectors of meteorological payload of several geosynchronous satellites of ISRO. A three stage cooler was developed at Thermal Systems Group, ISAC to achieve ...
  • The optical properties of three Type II supernovae: 2014cx, 2014cy, and 2015cz 
    Dastidar, R; Misra, K; Singh, M; Pastorello, A; Sahu, D. K; Wang, X; Gangopadhyay, A; Tomasella, L; Zhang, J; Bose, S; Mo, J; Elias-Rosa, N; Tartaglia, L; Yan, S; Brijesh Kumar; Anupama, G. C; Pandey, S. B; Rui, L; Zhang, T; Terreran, G; Ochner, P; Huang, F (Oxford University Press on behalf of the Royal Astronomical Society, 2021-06)
    We present the photometric and spectroscopic analysis of three Type II supernovae (SNe): 2014cx, 2014cy, and 2015cz. SN 2014cx is a conventional Type IIP with shallow slope (0.2 mag/50 d) and an atypical short plateau ...
  • Optical Spectra of Recent Supernovae of Type Ia: SN1995AL, SN1997Y, SN 1997BP 
    Anupama, G. C (American Astronomical Society, 1997-11)
    Optical spectra of three recent supernovae of type Ia: SN1995al in NGC 3021, SN1997Y in NGC 4675, and SN 1997bp in NGC 4680 are presented. Comparing the spectra with those of other normal type a supernovae, the epoch since ...
  • Optical spectroscopic and 2MASS measurements of Stephenson Halpha stars 
    Maheswar, G; Manoj, P; Bhatt, H. C (European Southern Observatory, 2003-05)
    We present the results of spectroscopic observations for 52 objects from the list of Halpha emission stars of Stephenson (\cite{Ste86}). Out of six known T Tauri stars observed, five showed Halpha in emission and in one ...
  • Optical spectroscopic and polarization properties of 2011 outburst of the recurrent nova T Pyxidis 
    Pavana, M; Ramya, M. Anche; Anupama, G. C; Ramaprakash, A. N; Selvakumar, G (EDP Sciences, 2019-02)
    Aims. We aim to study the spectroscopic and ionized structural evolution of T Pyx during its 2011 outburst, and also study the variation in degree of polarization during its early phase. Methods. Optical spectroscopic data ...
  • Optical Spectroscopy of Classical Be Stars in Old Open Clusters 
    Jagadeesh, Madhu Kashyap; Mathew, Blesson; Paul, K. T; Banerjee, Gourav; Bhattacharyya, Suman; Anusha, R; Pramod Kumar, S (IOP Publishing, 2023-03)
    We performed the optical spectroscopy of 16 classical Be stars in 11 open clusters older than 100 Myr. Ours is the first spectroscopic study of classical Be stars in open clusters older than 100 Myr. We found that the Hα ...
  • Optical spectroscopy of classical Be stars in open clusters 
    Mathew, B; Subramaniam, A (Astronomical Society of India, 2011-12)
    We present a spectroscopic study of 150 Classical Be stars in 39 open clusters using medium resolution spectra in the wavelength range 3800 – 9000 A° . Onethird of the sample (48 stars in 18 clusters) has been studied ...
  • Optical spectroscopy of Galactic field classical Be stars 
    Banerjee, G; Mathew, B; Paul, K. T; Subramaniam, A; Bhattacharyya, S; Anusha, R (Oxford University Press on behalf of the Royal Astronomical Society, 2021-01)
    In this study, we analyse the emission lines of different species present in 118 Galactic field classical Be stars in the wavelength range of 3800–9000 Å. We re-estimated the extinction parameter (AV) for our sample stars ...
  • Optical Spectroscopy of GK Persei during outburst and quiescence 
    Kamath, U. S; Anupama, G. C (American Institute of Physics, 2002)
    We present here the optical spectra of Gk Persei obtained during 1995 – 2001. This period includes two dwarf-nova outbursts and the quiescence phases.
  • Optical spectroscopy of nova V1494 Aquilae 1999 
    Anupama, G. C; Sahu, D. K; Mayya, Y. D (Astronomical Society of India, 2001)
  • Optical spectroscopy of SN1998S 
    Anupama, G. C; Pandey, G; Sivarani, T (Astronomical Society of India, 2000)

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