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Browsing by Author "Banerjee, D. P. K"

Browsing by Author "Banerjee, D. P. K"

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  • The effect of aberrations on image quality - A study for the 1.2m Gurusikhar Infrared Telescope 
    Banerjee, D. P. K; Bobra, A. D; Subhedar, D. V (Astronomical Society of India, 1997)
    The achromatic aberrations, which in general affect image quality in telescopes, have been studied in context of the 1.2 m Gurusikhar Infrared Telescope. The analysis gives the magnitudes of aberrations for different fields ...
  • Evidence of expansion in the central region of NGC 2346 
    Banerjee, D. P. K; Anandarao, B. G; Desai, J. N; Jain, S. K; Mallik, D. C. V (International Astronomical Union, 1989)
  • Excitation Mechanism of O i Lines in Herbig Ae/Be Stars 
    Mathew, v; Manoj, P; Narang, Mayank; Banerjee, D. P. K; Pratheeksha Nayak; Muneer, S; Vig, S; Kumar, S. P; Paul, K. T; Maheswar, G (IOP Publishing, 2018-04-10)
    We have investigated the role of a few prominent excitation mechanisms viz. collisional excitation, recombination, continuum fluorescence, and Lyman beta fluorescence on the O i line spectra in Herbig Ae/Be stars. The aim ...
  • FLAGS - A Fibre Linked Astronomical Grating Spectrograph 
    Banerjee, D. P. K; Rawat, S. D; Pathan, F. M; Anandarao, B. G (Astronomical Society of India, 1999)
    The design and construction of a fibre - linked grating spectrograph, developed for astronomical studies, is described here. The spectrograph has a resolving power of about 10,000 over the visible region (4000 - 7000 ...
  • Imaging Fabry-Perot spectroscopic observations on the planetary nebula NGC 1514 
    Muthumariappan, C; Anandarao, B. G; Banerjee, D. P. K (Astronomical Society of India, 1996)
  • Insights into the evolution of symbiotic recurrent novae from radio synchrotron emission: V745 Scorpii and RS Ophiuchi 
    Kantharia, N. G; Dutta, P; Roy, N; Anupama, G. C; Ishwara-Chandra, C. H; Chitale, A; Prabhu, T. P; Banerjee, D. P. K; Ashok, N. M (Oxford University Press on behalf of the Royal Astronomical Society, 2016-02)
    We present observations at 610 and 235 MHz using the Giant Metrewave Radio Telescope (GMRT) of the recurrent nova V745 Scorpii which recorded its last outburst on 2014 February 6. This is the second symbiotic recurrent ...
  • IR Spectroscopy of Nova-like Sources 
    Banerjee, D. P. K; Ashok, N. M (Astronomical Society of India, 2003)
    Near - IR spectroscopic and photometric observations of the eruptive variables V838 Mon and V445 Puppis in the J H K bands are reported. These objects erupted in nova-like explosions but evolved into rather unique and ...
  • JHK Spectroscopy of the Enigmatic Variable V445 Puppis 
    Ashok, N. M; Banerjee, D. P. K (Astronomical Society of India, 2003)
    Near-IR spectroscopic observations are reported for the enigmatic, nova-like, variable V445 Puppis. The near-IR spectra are hydrogen-deficient and unusually rich in CI lines. The spectra indicate that the object could be ...
  • Kinematic studies of five galactic planetary nebulae 
    Banerjee, D. P. K; Anandarao, B. G; Jain, S. K; Mallik, D. C. V (The European Southern Observatory, 1990-12)
    High-resolution Fabry-Perot observations have been made to determine the velocity structure of five PNe and to subsequently relate the observations to the morphology of the objects. New kinematic data on one of these PNe, ...
  • Limited Seeing Measurements at Mount Abu Infrared Observatory 
    Ashok, N. M; Banerjee, D. P. K (Astronomical Society of India, 2002-12)
    Measurements of atmospheric seeing for the Mount Abu Infrared Observatory, Gurusikhar are presented. Observations made with a differential image motion monitor, between 6 December 1999 to 28 April 2000, give an ...
  • Modelling the synchrotron light curves in recurrent novae V745 Scorpii and RS Ophiuchi 
    Kantharia, N. G; Dutta, P; Roy, N; Anupama, G. C; Chitale, A; Ishwara-Chandra, C; Prabhu, T. P; Ashok, N. M; Banerjee, D. P. K (Astronomical Society of India, 2015-02)
    In this paper, we present the synchrotron light curve at 610 MHz from the recurrent nova V745 Sco following its outburst on 6 February 2014. The system has been detected and periodically monitored with the Giant Metrewave ...
  • Morphology of the bipolar planetary nebula NGC 2346 from emission line profile studies 
    Anandarao, B. G; Banerjee, D. P. K; Desai, J. N; Jain, S. K; Mallik, D. C. V (Royal Astronomical Society, 1988-11)
    High resolution observations of H-alpha 6563-A, forbidden O-III 5007 A, and forbidden N-II 6583-A emission lines in the bipolar planetary nebula NGC 2346 are presented. From the widths of the alpha and forbidden N-II lines, ...
  • Near-infrared and optical studies of the fast nova V4643 Sgr (Nova Sagittarii 2001) 
    Ashok, N. M; Banerjee, D. P. K; Varricatt, W. P; Kamath, U. S (Blackwell Publishing, 2006-05)
    V4643 Sagittarii or Nova Sagittarii 2001 was discovered in outburst at 7.7 mag on 2001 February 24. Here, we present near-infrared results of this fast classical nova obtained in the early decline phase in 2001 March ...
  • Near-infrared spectroscopy of Nova Sagittarii 2001 (V4643 Sgr) 
    Ashok, N. M; Banerjee, D. P. K; Varricatt, W. P (Astronomical Society of India, 2002-09)
    Near-infrared spectra of the very fast ReiN-type nova, Nova Sagittarii 2001 (V464a Sgr) obtained in the early decline phase and the period 110 to 170 days after the discovery date are presented. The spectrum in the early ...
  • On the accuracy of the caustic test 
    Banerjee, D. P. K; Willstrop, R. V; Anandarao, B. G (Astronomical Society of India, 1999)
  • Optical Studies of V4332 Sagittarii: Detection of Unusually Strong K I and Na I Lines in Emission 
    Banerjee, D. P. K; Ashok, N. M (University of Chicago Press, 2004)
    We present optical observations of the enigmatic nova-like variable V4332 Sgr. The importance of this object should not be understated since it is considered to be the possible prototype of a new class of eruptive variables. ...
  • Optical/IR studies of Be stars in NGC 6834 with emphasis on two specific stars 
    Mathew, B; Varricatt, W. P; Subramaniam, A; Ashok, N. M; Banerjee, D. P. K (IOP Publishing, 2014-09)
  • Pointing-accuracy for the 1.2m Gurushikhar telescope - measurement and improvement 
    Bobra, A. D; Subhedar, D. V; Banerjee, D. P. K (Astronomical Society of India, 1998)
  • Strong near-infrared carbon in the type Ia supernova iPTF13ebh 
    Hsiao, E. Y; Burns, C. R; Contreras, C; Hoflich, P; Sand, D; Marion, G. H; Phillips, M. M; Stritzinger, M; Gonzalez-Gaitan, S; Mason, R. E; Folatelli, G; Parent, E; Gall, C; Amanullah, R; Anupama, G. C; Arcavi, I; Banerjee, D. P. K; Beletsky, Y; Blanc, G. A; Bloom, J. S; Brown, P. J; Campillay, A; Cao, Y; De Cia, A; Diamond, T; Freedman, W. L; Gonzalez, C; Goobar, A; Holmbo, S; Howell, D. A; Johansson, J; Kasliwal, M. M; Kirshner, R. P; Krisciunas, K; Kulkarni, S. R; Maguire, K; Milne, P. A; Morrell, N; Nugent, P. E; Ofek, E. O; Osip, D; Palunas, P; Perley, D. A; Persson, S. E; Piro, A. L; Rabus, M; Roth, M; Schiefelbein, J. M; Srivastav, S; Sullivan, M; Suntzeff, N. B; Surace, J; Wozniak, P. R; Yaron, O (EDP Sciences, 2015-06)
    We present near-infrared (NIR) time-series spectroscopy, as well as complementary ultraviolet (UV), optical, and NIR data, of the Type Ia supernova (SN Ia) iPTF13ebh, which was discovered within two days from the estimated ...
  • Studies of a possible new Herbig Ae/Be star in the open cluster NGC 7380 
    Mathew, B; Banerjee, D. P. K; Ashok, N. M; Subramaniam, A; Bhavya, B; Joshi, V (Chinese Academy of Sciences, 2012-02)
    We present a study of the star 2MASS J22472238+5801214 with the aim of identifying its true nature which has hitherto been uncertain. This object, which is a member of the young cluster NGC 7380, has been variously proposed ...

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