IIA Institutional Repository: Recent submissions

  • Brajesh Kumar; Surdej, J; Hickson, P; Borra, E. F; Finet, F; Swings, J. P; Habraken, S; Pandey, S. B (Astronomical Society of India, 2015-03)
    We present an overview and status of the upcoming 4m International Liquid Mirror Telescope facility at Devasthal, Nainital and its uses for the study of core-collapse supernovae (CCSNe).
  • Zemcov, Michael; Arcavi, Iair; Arendt, Richard G; Bachelet, Etienne; Beichman, Chas; Bock, James; Brandt, Pontus; Ranga Ram Chary; Cooray, Asantha; Dragomir, Diana; Gorjian, Varoujan; Harman, Chester E; Henry, Richard Conn; Lisse, Carey; Lubin, Philip; Matsuura, Shuji; McNutt, Ralph; Murthy, J; Poppe, Andrew R; Paul, Michael V; Reach, William T; Shvartzvald, Yossi; Street, R A; Symons, Teresa; Werner, Michael (American Astronomical Society, 2019-05)
    Astrophysical measurements away from the 1 AU orbit of Earth can enable several astrophysical science cases that are challenging or impossible to perform from Earthbound platforms, including: building a detailed understanding ...
  • Tanya Das (Indian Institute of Astrophysics, 2016-07)
    High precision spectroscopy is bounded by two major challenges, first being instrument instability, mainly caused by temperature and pressure variations, and second is due to the limitations of traditional calibration ...
  • Pavankumar, K (Indian Institute of Astrophysics, 2016-07)
    Imaging Polarimetry of Extended sources is not very common. This project entitled "Dual Beam Imaging Polarimeter" is an attempt to build one for the 1.3m telescope in Kavalur. The Instrument will make use of the Wide field ...
  • Anwesh Kumar, M (Indian Institute of Astrophysics, 2015-08)
    Ground based observations in the Mid-infrared wavelength range has the advantages of greater penetrating power through interstellar gas and dust, ability to observe cooler objects, and less effect of atmospheric turbulence. ...
  • Varun Kumar (Indian Institute of Astrophysics, 2015-08)
    To address key research problems of astronomy, a large aperture telescope has become a need for every astronomical group around the globe. Optical telescopes with single monolithic primary mirror of 8m and above aperture ...
  • Anshu Kumari (Indian Institute of Astrophysics, 2015-07)
    The solar coronal mass ejections (CMEs) play a direct and vital role in deciding the space weather, so it becomes inevitable to study their dynamical properties in the lower corona (i.e., over the radial distance range: ...
  • Sireesha, C (Indian Institute of Astrophysics, 2015-08)
    Essentially all information about astronomical objects outside the solar system reach us via light, i.e., the electromagnetic radiation. White light is composed of many wavelengths which are not resolved into their ...
  • Ambily, S (Indian Institute of Astrophysics, 2014-08)
    The UV photon event rate is very low in the near space region and we need to have a very sensitive detector to discriminate between the noise and actual signal. Photon counting method is usually used to detect such weak ...
  • Phanindra, D. V. S (Indian Institute of Astrophysics, 2014-08)
    Electromagnetic radiation from Sun and stars suffers from the turbulence in earth atmosphere. The turbulence changes the complex refractive index of air which in turn modifies the electromagnetic signal. This condition is ...
  • Chatterjee, Subhamoy (Indian Institute of Astrophysics, 2014-07)
    Imaging sun in different wavelengths is invaluable for understanding its dynamic aspects and relevent impacts on space weather. The atmosphere of the Sun presents a number of puzzling physical phenomena of great importance. ...
  • Mugundhan, V (Indian Institute of Astrophysics, 2014-08)
    The Gauribidanur RadioheliograPH (GRAPH) in its present configuration is operated in the interferometer mode over the frequency range 30-100 MHz. It is proposed to design a beam-former unit for use with the GRAPH so that ...
  • Mohan, B.S; Kumbar, M; Prabahar, P (Academic Book Publishers, 2017-03)
    The paper presents qualitative aspects of the research communications of Nobel Laureate Rainer Weiss based on 224 journal articles published during the publication phase of 1957-2017. This study has explored different ...
  • Hasan, S. S; Bagare, S. P; Rangarajan, K. E (Indian National Science Academy, 2014-11)
    A major project called the National Large Solar Telescope (NLST) has been proposed for pursuing Solar Astronomy at High Altitude. The project envisages the development of a state-of-the-art 2-m class telescope to carry ...
  • Sreekanth Reddy, V (Indian Institute of Astrophysics, 2014-08)
    Edge sensors are high precision displacement sensors used in segmented mirror telescope to measure relative displacement between two mirror segments. An edge sensor based on parallel plate capacitor is being used in Keck ...
  • Ramya, M. Anche (Indian Institute of Astrophysics, 2014-08)
    The polarization introduced due to TMT telescope optics is studied using an analytical model. Mueller matrices are also generated for each optical element using Zemax based on which the instrumental polarization due to ...
  • Nagendra, K. N (Astronomical Society of the Pacific, 2014-10)
    In this review we first describe briefly the techniques to formulate partial redistribution (PRD) matrices for polarized line scattering on atoms. These matrices have to be formulated by either semi-classical or quantum ...
  • Sowmya, K; Nagendra, K. N; Sampoorna, M (Astronomical Society of the Pacific, 2014-10)
    The Second Solar Spectrum formed by coherent scattering processes in the Sun, is highly structured. It is characterized by numerous blend lines, both intrinsically polarizing and depolarizing, superposed on the background ...
  • Jacob, A (Indian Institute of Astrophysics, 2014-08)
    We are in an era where astronomy had taken steps to build giant telescope which have optics of size more than 10m, we can commonly call them ELTs or Extremely Large Telescopes. Due to various reasons like cost, ease of ...
  • Smitha, H. N; Nagendra, K. N; Stenflo, J. O; Sampoorna, M (Astronomical Society of the Pacific, 2014-10)
    The Ba ii D2 line at 4554 Å is a good example, where the F-state interference effects due to the odd isotopes produce polarization profiles, which are very different from those of the even isotopes that do not exhibit ...

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