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Browsing by Author "Singh, M"

Browsing by Author "Singh, M"

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  • Flash Ionization Signatures in the Type Ibn Supernova SN 2019uo 
    Gangopadhyay, A; Misra, K; Hiramatsu, D; Wang, Shan-Qin; Hosseinzadeh, G; Wang, Xiaofeng; Valenti, Stefano; Zhang, Jujia; Howel, D. A; Arcavi, Iair; Anupama, G. C; Burke, Jamison; Dastidar, Raya; Koichi Itagaki, Koichi; Kumar, Brajesh; Kumar, B; Li, Long; McCully, Curtis; Mo, Jun; Pandey, S. B; Pellegrino, Craig; Sa, Hanna; Sahu, D. K; Pankaj Sanwal; Singh, A; Singh, M; Zhang, Jicheng; Zhang, Tianmeng; Zhang, Xinhan (IOP Publishing, 2020-02-01)
    We present photometric and spectroscopic observations of the type Ibn supernova (SN) 2019uo, the second ever SN Ibn with flash ionization (He ii, C iii, N iii) features in its early spectra. SN 2019uo displays a rapid ...
  • Holographic cylindrical grating for cosmic X-ray and XUV spectroscopy in grazing incidence 
    Singh, M; Singh, S (Optical Society of America, 1980-10)
    The theory of the holographically prepared grating on a cylindrical surface has been developed, to be applicable in grazing incidence, in a convergent beam of light and in transmission in the objective mode for the design ...
  • Holographic cylindrical transmission grating in divergent illumination.1.grating rulings perpendicular to axis of cylindrical surface 
    Singh, M; Singh, S; Kasana, R. S (National Institute of Science Communication And Information Resources, 1981-03)
    The theory of a cylindrical transmission grating prepared holographically has been developed. The condition and recording parameters for minimum aberration have been derived. The aberrations of the spectral images have ...
  • Light Curve and Spectral Evolution of Type IIb Supernovae 
    Gangopadhyay, A; Misra, K; Pastorello, A; Sahu, D. K; Singh, M; Dastidar, R; Anapuma, G. C; Kumar, B; Pandey, S. B (Societe Royale des Sciences de Liege, 2018-04)
    Stripped-Envelope Supernovae constitute the sub-class of core-collapse supernovae that strip off their outer hydrogen envelope due to high stellar winds or due to interaction with a binary companion where mass transfer ...
  • A Low-Frequency Study of Recently Identified Double-Double Radio Galaxies 
    Nandi, S; Saikia, D. J; Roy, R; Dabhade, P.; Wadadekar, Y; Larsson, J; Baes, M; Chandola, H. C; Singh, M (Oxford University Press on behalf of the Royal Astronomical Society, 2019-07)
    n order to understand the possible mechanisms of recurrent jet activity in radio galaxies and quasars, which are still unclear, we have identified such sources with a large range of linear sizes (220–917 kpc), and hence ...
  • A multifrequency study of the large radio galaxies 3C46 and 3C452 
    Nandi, S; Pirya, A; Pal, S; Konar, C; Saikia, D. J; Singh, M (Wiley-Blackwell, 2010-05)
    We present low-frequency observations starting from ∼150 MHz with the Giant Metrewave Radio Telescope, and high-frequency observations with the Very Large Array of two large radio galaxies 3C46 and 3C452. These observations ...
  • New monochromators of concave grating suitable for space telescopes 
    Singh, M (Optical Society of America, 1978)
    Three types of new mono chromators based on the new mounting of concave grating by Singh Majumdar (SM) are described. These mono chromators are very compact and simple in operation, fulfilling the requirements of a mono ...
  • New mounting for x-ray and extreme ultra-violet concave holographic grating 
    Reddy, G. P; Singh, M (Institute of Physics, 1988-04)
    An entirely new mounting for concave holographic gratings for X-ray and the extreme ultraviolet (EUV) has been proposed and its properties have been investigated theoretically. Design parameters for recording a holographic ...
  • New mountings of concave reflection holographic grating 
    Singh, M; Reddy, G. P (Elsevier, 1987-06)
  • A new normal incidence concave holographic grating mounting 
    Reddy, G. P; Singh, M (Elsevier, 1989-09)
    In this paper we present a new spectrograph for extreme ultraviolet region. It is based on unconventional focussng properties of a concave holographic grating so far unexplored. The theoretical results shows that it will ...
  • A new probable Be Star Alpha Leo 
    Singh, M (Konkoly Observatory, 1982-08-16)
  • New technique of holographic multiplexing 
    Singh, M (National Institute of Science Communication And Information Resources, 1978-08)
  • Observational properties of a type Ib supernova MASTER OT J120451.50+265946.6 in NGC 4080 
    Singh, M; Misra, K; Sahu, D. K; Dastidar, R; Gangopadhyay, A; Srivastav, S; Anupama, G. C; Bose, S; Lipunov, V; Chakradhari, N. K; Brajesh Kumar; Pandey, S. B; Gorbovskoy, E; Balanutsa, P (Oxford University Press on behalf of the Royal Astronomical Society, 2019-06)
    MASTER OT J120451.50+265946.6 (M12045), discovered by the MASTER Global Robotic Net, is a Type Ib supernova (SN) that exploded in NGC 4080. We present the BVRI photometric and spectroscopic observations up to ∼250 d since ...
  • On the production of hydrocarbons in Titan's atmosphere 
    Saxena, P. P; Bhatnagar, S; Singh, M (Astronomical Society of India, 2003)
    The production of C(1 D) atoms and their role in the production of (C1, C2, C3, C4) hydrocarbons in Titan's atmosphere are discussed. The reaction between C(1 D) atom and H2 molecule to produce the methylidyne (CH) radical ...
  • 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 ...
  • Photometric and polarimetric observations of fast declining Type II supernovae 2013hj and 2014G 
    Bose, S; Kumar, B; Misra, K; Matsumoto, K; Brajesh Kumar; Singh, M; Fukushima, D; Kawabata, M (Oxford University Press on behalf of the Royal Astronomical Society, 2016-01)
    We present broad-band photometric and polarimetric observations of two Type II supernovae (SNe) 2013hj and 2014G. SN 2014G is a spectroscopically classified Type IIL event, which we also confirm photometrically because ...
  • Production of sulphur dimers (S2) in Comet C/1996 B2 (Hyakutake) 
    Saxena, P. P; Singh, M; Bhatnagar, S (Astronomical Society of India, 2003)
    The reaction mechanism involving the association of two sulphur atoms through ethylene (C2H4), the latter acting as a catalyst to produce cometary sulphur dimers (S2) (Saxena & Misra, 1995), has been employed to compute ...
  • Seya namioka monochromators theory and design of holographic concave grating 
    Singh, M; Reddy, G. P (Elsevier, 1986-11)
  • Site characterization for the UPSO-TIFR telescope 
    Sagar, R; Uddin, W; Pandey, A. K; Stalin, C. S; Mohan, V; Sanwal, B. B; Gupta, S. K; Yadav, R. K. S; Durgapal, A. K; Joshi, S; Kumar, B; Gupta, A. C; Joshi, Y; Srivastava, J. B; Chaubey, U. S; Singh, M; Pant, P; Gupta, K. G; Padalia, T. D (Astronomical Society of India, 2000)
    The Uttar Pradesh State Observatory, Naini Tal and Tata Institute of Fundamental Research, Mumbai plan to install jointly a 3 metre size optical telescope at Devasthal located east of Naini Tal about 50 km by road. The ...
  • SN 2013ej: a type IIL supernova with weak signs of interaction 
    Bose, S; Sutaria, F. K; Kumar, B; Duggal, C; Misra, K; Brown, P. J; Singh, M; Dwarkadas, V; York, D. G; Chakraborti, S; Chandola, H. C; Dahlstrom, J; Ray, A; Safonova, M (IOP Publishing, 2015-06)
    We present optical photometric and spectroscopic observations of SN 2013ej. It is one of the brightest Type II supernovae (SNe II) exploded in a nearby (∼10 Mpc) galaxy, NGC 628. The light-curve characteristics are similar ...

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