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Browsing IIAP Publications by Title

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  • A soft actuator for prototype segmented mirror telescope 
    Prasanna, Deshmukh; Parihar, P. S; Mishra, Deepta Sundar; Prakash, Ajin; Kemkar, P. M. M (SPIE-The International Society for Optical Engineering, 2016-07)
    The Segmented Mirror Telescopes (SMT) are built using small hexagonal mirror segments placed side by side to form a monolithic primary mirror of very large size. The effective figure of such a segmented primary mirror is ...
  • Soft X-ray and FUV observations of Nova Her 2021 (V1674 Her) with AstroSat 
    Bhargava, Yash; Dewangan, Gulab Chand; Anupama, G. C; Kamath, U. S; Sonith, L. S; Singh, Kulinder Pal; Drake, J. J; Beardmore, A; Luna, G. J. M; Orio, M; Page, K. L (Published by Oxford University Press on behalf of Royal Astronomical Society, 2024-02)
    Nova Her 2021 or V1674 Her was one of the fastest novae to be observed so far. We report here the results from our timing and spectral studies of the source observed at multiple epochs with AstroSat. We report the detection ...
  • Soft x-ray imager using multilayer mirror optics for martian exospheric studies 
    Panini, S. S; Narendranath, S; Sreekumar, P; Athiray, P. S (2010-07)
    Planetary X ray measurements in the past have yielded valuable science in several areas such as the surface chemistry, polar auroras, magnetospheres and solar wind interaction with the exosphere. X-ray ...
  • Software for a simple two-axis numerical control system 
    Santhanam, P; Panchapakesan, S; Kirshnan, A (Elsevier, 1982-08)
    The principle of a two-axis NC (numerical control) wire EDM (electrical discharge machine) machine is described. A suitable programming language with appropriate commands for this application is presented. A software system ...
  • A software package for evaluating the performance of a star sensor operation 
    Mayuresh, Sarpotdar; Mathew, J; Sreejith, A. G; Nirmal, K; Ambily, S; Prakash, A; Safonova, M; Murthy, J (Springer, 2017-02)
    We have developed a low-cost off-the-shelf component star sensor (StarSense) for use in minisatellites and CubeSats to determine the attitude of a satellite in orbit. StarSense is an imaging camera with a limiting magnitude ...
  • A Sol-Gel Derived AR coating on Ophthalmic Lenses in the Visible Region 
    Biswas, P. K; Atta, A. K; Ganguli, D (Indian Institute of Astrophysics, Bangalore, 1991)
    Deposition of antireflective coating in the visible region by the sol-gel spinning technique has been described in this communication. A 2-layer design, centred at 550 nm, was used. The design can be denoted as Glass/H/L/Air ...
  • Solar Active Longitudes from Kodaikanal White-Light Digitized Data 
    Mandal, Sudip; Chatterjee, Subhamoy; Banerjee, D (IOP Publishing, 2017-01-20)
    The study of solar active longitudes has generated great interest in recent years. In this work we have used a unique, continuous sunspot data series obtained from the Kodaikanal observatory and revisited the problem. An ...
  • Solar active region magnetic parameters and their relationship with the properties of halo coronal mass ejections 
    Shanmugaraju, A; Vijayalakshmi, P; Bendict Lawrance, M; Moon, Y. -J; Ebenezer, E (Elsevier B.V., 2023-08)
    The coronal mass ejections (CMEs) from the sun consist of the plasma and strong magnetic fields (~4–5 G at 1.3 R⊙) and generally, the fast CMEs are often associated with energetic particles of energy few hundreds of MeV. ...
  • Solar activity 
    Das, A. K (Royal Astronomical Society, 1956)
  • Solar activity 
    Laurie, P. S; Bappu, M. K. V (Royal Astronomical Society, 1970-12)
  • Solar activity 
    Gokhale, M. H (Indian Institute of Astrophysics, Bangalore, 1988)
    Sun could have had a nice and perfect spherical symmetry in its atmosphere and probably no variations on time scales smaller than hundreds of thousands of years if (i) the energy produced in its core could be transported ...
  • Solar activity (Report on progress of astronomy) 
    Das, A. K (Royal Astronomical Society, 1954)
  • Solar activity (Report on progress of astronomy) 
    Das, A. K (Royal Astronomical Society, 1951)
  • The Solar Activity Monitor Network – SAMNet 
    Erdelyi, Robertus; Korsos, Marianna B; Huang, Xin; Yang, Yong; Pizzey, Danielle; Wrathmall, Steven A; Hughes, Ifan G; Dyer, Martin J; Dhillon, Vikram S; Belucz, Bernadett; Brajsa, Roman; Chatterjee, Piyali; Cheng, Xuewu; Deng, Yuanyong; Dominguez, Santiago Vargas; Joya, Raul; Gömöry, Peter; Gyenge, Norbert G; Hanslmeier, Arnold; Kucera, Ales; Kuridze, David; Li, Faquan; Liu, Zhong; Xu, Long; Mathioudakis, Mihalis; Matthews, Sarah; McAteer, James R.T; Pevtsov, Alexei A; Pötzi, Werner; Romano, Paolo; Shen, Jinhua; Temesvary, Janos; Tlatov, Andrey G; Triana, Charles; Utz, Dominik; Veronig, Astrid M; Wang, Yuming; Yan, Yihua; Zaqarashvili, Teimuraz; Zuccarello, Francesca (EDP Sciences, 2022-06)
    The Solar Activity Magnetic Monitor (SAMM) Network (SAMNet) is a future UK-led international network of ground-based solar telescope stations. SAMNet, at its full capacity, will continuously monitor the Sun’s intensity, ...
  • Solar Activity-Prominences 
    Bappu, M. K. V (Royal Astronomical Society, 1963-09)
  • Solar Activity-Prominences 
    Bappu, M. K. V (1964-09)
  • Solar and Stellar Convection 
    Narasimha, D (Indian Institute of Astrophysics, Bangalore, 1988)
    The flow field in stellar convection zones, characterised by high Rayleigh number, low Prandtl number and large Reynolds number, is time dependent and turbulent, consisting of eddies having a range of scale-lengths upto ...
  • Solar astronomy at high altitude 
    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 ...
  • Solar asymmetry and sun-earth connections 
    Georgieva, K; Kirov, B; Javaraiah, J (European Space Agency, 2003-09)
    The effect of solar activity on climate depends on the North-South solar activity asymmetry: the correlation between solar activity and a number of meteorological elements has opposite signs for predominantly more active ...
  • Solar Convection and Oscillations 
    Chitre, S. M (Indian Institute of Astrophysics, Bangalore, 1986)
    A wide variety of gravity and acoustic wave motions have been detected at the surface of the Sun as Doppler shifts of spectral lines. These velocity field provide a valuable probe for studying the internal solar structure ...

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