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  • A Simple Digital System Drive for Small Telescopes 
    Bhattacharyya, J. C; Ramamoorthy, K. S; Chandramohan, R (Indian Institute of Astrophysics, Bangalore, 1980)
    A variable stable frequency source employing a crystal oscillator and a programmable digital divider chain is described. The system offers an ideal arrangement for controlling tracking rates of small and medium size ...
  • Simple method of star photography 
    Tomkins (Astronomical Society of India, 1911-03)
  • A simple model for coronal loops and their stability 
    Satya Narayanan, A (European Space Agency, 1999-12)
  • A Simple Radial Gradient Filter for Batch-Processing of Coronagraph Images 
    Patel, Ritesh; Majumdar, Satabdwa; Pant, Vaibhav; Banerjee, D (Springer, 2022-03)
    Images of the extended solar corona, as observed by different white-light coronagraphs, include the K- and F-corona and suffer from a radial variation in intensity. These images require separation of the two coronal ...
  • A simplified ab initio treatment of diradicaloid structures produced from stretching and breaking chemical bonds 
    Sinha Ray, Suvonil; Ghosh, A; Shit, Anindita; Chaudhuri, R. K; Chattopadhyay, S (Royal Society of Chemistry Publishing, 2017-09)
    he present investigation reports on the prospect of usi ng state specific multireference perturbation theory (SSMRPT) with an improved virtual orbital complete ac tive space configuration interaction (IVO-CASCI) reference ...
  • A simplified account of the correlation effects to bond breaking processes: the Brillouin-Wigner perturbation theory using a multireference formulation 
    Manna, S.; Ray, S. S; Chattopadhyay, S; Chaudhuri, R. K (American Institute of Physics, 2019-08-14)
    Adaptation of improved virtual orbital complete active space configuration interaction functions in state-specific multireference perturbation theory motivated by the Brillouin-Wigner perturbation scheme using Moller-Plesset ...
  • Simulating charge transport to understand the spectral response of swept charge devices 
    Athiray, P. S; Sreekumar, P; Narendranath, S; Gow, J. P. D (EDP Sciences, 2015-11)
    Context. Swept Charge Devices (SCD) are novel X-ray detectors optimized for improved spectral performance without any demand for active cooling. The Chandrayaan-1 X-ray Spectrometer (C1XS) experiment onboard the Chandrayaan-1 ...
  • Simulating medium-spectral-resolution exoplanet characterization with SCALES angular/reference differential imaging 
    Desai, Aditi; Sallum, Stephanie E; Banyal, R. K; Batalha, Natalie; Batalha, Natasha; Blake, Geoff; Brandt, Tim; Briesemeister, Zack; Kleer, Katherine de; Pater, Imke de; Eisner, Josh; Fong, Wen-fai; Greene, Tom; Honda, Mitsuhiko; Kain, Isabel; Kilpatrick, Charlie; Lach, Mackenzie; Liu, Mike; Macintosh, Bruce; Martinez, Raquel A; Mawet, Dimitri; Miles, Brittany; Morley, Caroline; Powell, Diana; Sheehan, Patrick; Skemer, Andrew J; Spilker, Justin; Stelter, R. Deno; Stone, Jordan; Surya, Arun; Sivarani, T; Wagner, Kevin; Zhou, Yifan (SPIE-The International Society for Optical Engineering, 2023-10)
    SCALES (Slicer Combined with Array of Lenslets for Exoplanet Spectroscopy) is a 2 - 5 micron high-contrast lenslet-based integral field spectrograph (IFS) designed to characterize exoplanets and their atmospheres. The SCALES ...
  • Simulation and experimental studies of polarization properties of atmospheric Cerenkov pulses 
    Bhat, C. L; Rannot, R. C; Mohapatra, D. K; Gandhi, V. N; Tickoo, A. K; Kaul, R; Kaul, S. K; Kaul, S. R; Goyal, H. C; Bhatt, N (Astronomical Society of India, 1999)
    We present here preliminary results obtained form some simulation and experimental investigations on the polarization state of atmospheric Cerenkov events.
  • Simulation of multiple aperture synthesis 
    Saha, S. K; Jayarajan, A. P; Rangarajan, K. E; Chatterjee, S (European Space Observatory, 1988)
    In view of the importance of multiple aperture synthesis in optical astronomy, a computer simulation of the same is demonstrated. The fringe patterns obtained through the aperture mask of six and nine holes arranged ...
  • Simulation of old open clusters for UVIT on ASTROSAT 
    Sindhu, N; Subramaniam, A; Anu Radha, C (IOP Publishing, 2015-10)
    The Ultra Violet Imaging Telescope (UVIT) is one of the payloads on the first Indian multiwavelength satellite ASTROSAT, which is expected to be launched by the Indian Space Research Organisation (ISRO) in the year 2015. ...
  • Simulation of the small-scale magnetism in main-sequence stellar atmospheres 
    Salhab, R. G; Steiner, O; Berdyugina, S. V; Freytagz, B; Rajaguru, S. P; Steffen, M (EDP Sciences, 2018-06)
    Context. Observations of the Sun tell us that its granular and subgranular small-scale magnetism has significant consequences for global quantities such as the total solar irradiance or convective blueshift of spectral ...
  • Simulation Studies for Optimizing the Trigger Field of View of the TACTIC Imaging Element 
    Koul, M. K; Sapru, M. L (Astronomical Society of India, 2003)
    Simulation studies, for the Imaging Camera of the TACTIC -ray telescope have been carried out to optimize its trigger field of view for a point -ray source. The results indicate that a trigger field of 9 x 9 pixels should ...
  • Simultaneous dual wavelength observations of an impulsive microwave burst using the V.L.A. 
    Shevgaonkar, R. K; Kundu, M. R (Elsevier B.V., 1984)
    Simultaneous observations of a microwave burst at 2 and 6 cm wavelengths were carried out with the Very Large Array (VLA). The 6 cm burst source is located close to a magnetic neutral line, presumably near the top of a ...
  • Simultaneous imaging in optical and near-IR bands 
    Vadher, N. M; Shah, A. B; Shroff, A. J; Joshi, U. C (Astronomical Society of India, 2000)
    It is very important to have simultaneous observations in optical and near IR bands to understand several astrophysical phenomena. One problem is to know the nature of the central engine in blazars, which are in general ...
  • Simultaneous infrared and H-alpha measurements of Be stars 
    Apparao, K. M. V; Tarafdar, S. P; Verma, R. P; Iyengar, K. V. K; Ghosh, K. K (Indian Academy of Sciences, 1993)
    The observed infrared excess in Be stars is usually interpreted as free-free and free-bound emission from a hot gas envelope around the Be star. This hot gas should also emit H-alpha line radiation. Earlier observations ...
  • Simultaneous longitudinal and transverse oscillations in an active-region filament 
    Pant, V; Mazumder, R; Yuan, Ding; Banerjee, D; Srivastava, A. K; Shen, Yuandeng (Springer, 2016-11)
    We report on the co-existence of longitudinal and transverse oscillations in an active-region filament. On March 15, 2013, an M1.1 class flare was observed in Active Region AR 11692. A coronal mass ejection (CME) was found ...
  • Simultaneous longitudinal and transverse oscillations in filament threads after a failed eruption 
    Mazumder, R; Pant, V; Manuel Luna; Banerjee, D (EDP Sciences, 2020-01)
    Context. Longitudinal and transverse oscillations are frequently observed in the solar prominences and/or filaments. These oscillations are excited by a large-scale shock wave, impulsive flares at one leg of the filament ...
  • Simultaneous longitudinal and transverse oscillations in filament threads after a failed eruption 
    Rakesh Mazumder; Vaibhav Pant; Manuel Luna; Dipankar Banerjee (EDP Sciences, 2019-11)
    Longitudinal and transverse oscillations are frequently observed in the solar prominences and / or filaments. These oscilla- tions are excited by a large-scale shock wave, impulsive flares at one leg of the filament ...
  • Simultaneous microwave observations of solar flares at 6 and 20 CM wavelengths using the VLA 
    Melozzi, M; Kundu, M. R; Shevgaonkar, R. K (Kluwer Academic Publishers, 1985-06)
    Using the Very Large Array, solar burst observations have been carried out simultaneously at 6 and 20 cm. Structural changes and preheating have been observed in the flaring regions on time scales of minutes to tens of ...

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