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Browsing IIAP Publications by Title

Browsing IIAP Publications by Title

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  • Simultaneous Organisation of v, B - the Spicules 
    Krishan, V (International Astronomical Union, 1990)
  • Simultaneous Radio and Hα Observations of Be-Stars 
    Rengarajan, T. N; Tarafdar, S. P; Ghosh, K. K (European Southern Observatory, 1990-03)
    We have observed 18 Be stars in the radio continuum at 2cm wavelength with the VLA on 7th February 1987. We observed 12 of the stars the same night in the optical using an H alpha filter and the rest subsequently. No radio ...
  • Simultaneous solution of Kompaneets equation and radiative transfer equation in the photon energy range 1–125 keV 
    Peraiah, A; Srinivasa Rao, M; Varghese, B. A (Elsevier, 2011-03)
    Radiative transfer equation in plane parallel geometry and Kompaneets equation is solved simultaneously to obtain theoretical spectrum of 1–125 keV photon energy range. Diffuse radiation field are calculated using ...
  • Simultaneous Solution of Radiative Transfer Equation in the Comoving Frame and the Statistical Equilibrium Equation with Complete Redisribution 
    Peraiah, A (Indian Institute of Astrophysics, Bangalore, 1980)
    Complete redistribution with Voigt profile function has been employed in obtaining the simultaneous solution of line transfer and the statistical equilibrium equation for a non-LTE two level atom in an extended stellar ...
  • Simultaneous X-ray and Optical Observations of the T Tauri star TW Hya 
    Mallik, S. G. V; Brickhouse, N. S; Dupree, A. K (Springer, 2010)
    We report preliminary results obtained from a spectroscopy and photometry campaign of the T Tauri star TW Hya in February- March, 2007. A long HETG observation with CHANDRA and simultaneous optical observations around the ...
  • Simultaneous X-ray/UV Observations of Ultraluminous X-ray Source Holmberg II X-1 with Indian Space Mission Astrosat 
    Vinokurov, A; Atapin, K; Bordoloi, O. P; Sarkisyan, A; Kashyap, U; Chakraborty, M; Rahna, P. T; Kostenkov, A; Solovyeva, Y; Fabrika, S; Safonova, M; Gogoi, R; Sutaria, F. K; Murthy, J (Springer, 2022-09)
    We present the results of eight epochs of simultaneous UV and X-ray observations of the highly variable ultraluminous X-ray source (ULX) Holmberg II X-1 with AstroSat—Indian multiwavelength space satellite. During the ...
  • Singature of Dirac vs majorana of neutrinos from HECR 
    Balaji, K. R. S; Bhattacharjee, P; Mohanty, S; Nayak, S. N (Indian Academy of Sciences, 2000-08)
  • A Single-Cell Photopolarimeter 
    Jain, S. K; Bhattacharyya, J. C (Indian Institute of Astrophysics, Bangalore, 1987-02)
    A simple, single-cell photopolarimeter has been developed for use at the cassegrain focus of the 102 cm Ritchey-Chretien reflector at Kavalur. The design and performance of the instrument are discussed
  • A Single-Channel Polarimeter 
    Jain, S. K; Bhattacharyya, J. C (International Astronomical Union, 1986)
    The authors have developed a single-channel photopolarimeter to measure polarization to ≡1%, with an accuracy of 0.1%. Laboratory tests show that the performance of the instrument matches the requirements.
  • Singlet and triplet differential cross sections for pp-->ppπ0 
    Deepak, P. N; Ramachandran, G (The American Physical Society, 2002-02)
    The singlet and triplet differential cross sections for pp-->ppπ0 have been estimated for the first time at 325, 350, 375, and 400 MeV using the results of the recent experimental measurements [Phys. Rev. C 63, 064002 ...
  • SiO maser survey of AGB stars in the North Galactic Cap 
    Ita, Y; Deguchi, S; Fujii, T; Kameya, O; Miyoshi, M; Nakada, Y; Nakashima, J; Parthasarathy, M (EDP Sciences, 2001-09)
    A SiO maser survey in the J=1-0, v=1 and 2 transitions has been made for IRAS sources in the North Galactic Cap b > 30o) with the Nobeyama 45 m radio telescope. The sources were selected on the basis of their IRAS 12/25-μm ...
  • Site Evaluation Study for the Indian National Large Solar Telescope Using Microthermal Measurements 
    Dhananjay, K (Oxford University Press on behalf of the Royal Astronomical Society, 2014-01-21)
    A microthermal seeing measurement device has been developed in-house to measure the temperature structure function DT(r, h) and the air temperature Tair(h). A pressure sensor, located adjacent to it, measures the average ...
  • Size of the Ca+ Coarse Network in the Solar Chromosphere at Sunspot Minimum 
    Bappu, M. K. V; Sivaraman, K. R (1966)
    Auto-correlation measures of the coarse Ca+ network made on selected spectroheliograms obtained during the solar minimum period of 1964 and 1965 are described. The full width at half maximum of the normalised A.C. curve ...
  • The slicer combined with array of lenslets for exoplanet spectroscopy (SCALES): driving science cases and expected outcomes 
    Sallum, Steph; Skemer, Andrew; Stelter, Deno; Banyal, R. K; Batalha, Natalie; Batalha, Natasha; Blake, Geoff; Brandt, Tim; Briesemeister, Zack; Kleer, Katherine de; Pater, Imke de; Desai, Aditi; Eisner, Josh; Fong, Wen-fai; Greene, Tom; Honda, Mitsuhiko; Jensen-Clem, Rebecca; Kain, Isabel; Kilpatrick, Charlie; Kupke, Renate; Lach, Mackenzie; Liu, Michael C; Macintosh, Bruce; Martinez, Raquel A; Mawet, Dimitri; Miles, Brittany; Morley, Caroline; Powell, Diana; Sethuram, Ramya; Sheehan, Patrick; Spilker, Justin; Stone, Jordan; Surya, Arun; Sivarani, T; Unni, Athira; Wagner, Kevin; Zhou, Yifan (SPIE-The International Society for Optical Engineering, 2023-10)
    The Slicer Combined with Array of Lenslets for Exoplanet Spectroscopy (SCALES) is a 2 − 5 µm, high-contrast integral field spectrograph (IFS) currently being built for Keck Observatory. With both low (R ≲ 250) and medium ...
  • Slip rates of the Karakorum fault, Ladakh, India, determined using cosmic ray exposure dating of debris flows and moraines 
    Brown, E. T; Bendick, R; Bourlès, D. L; Gaur, V. K; Molnar, P; Raisbeck, G. M; Yiou, F (American Geophysical Union, 2002-09)
    We measure an average slip rate of 4 +/- 1 mm yr-1 along the Karakorum fault, heretofore considered one of Earth's greatest strike-slip faults and thought by many to play a key role in Asian deformation kinematics. Levees ...
  • The Sloan Digital Sky Survey Quasar Catalog: Sixteenth Data Release 
    Lyke, Brad W; Higley, Alexandra N; McLane, J. N; Schurhammer, D. P; Myers, A. D; Ross, A. J; Dawson, K; Chabanier, S; Martini, P; Busca, N. G; Mas des Bourboux, Helion du; Salvato, Mara; Streblyanska, A; Zarrouk, P; Burtin, E; Anderson, S. F; Bautista, J; Bizyaev, D; Brandt, W. N; Brinkmann, J; Brownstein, J. R; Comparat, J; Green, Paul; de la Macorra, Axel; Munoz Gutierrez, Andrea; Hou, Jiamin; Newman, J. A; Palanque-Delabrouille, N; Paris, I; Percival, W. J; Petitjean, P; Rich, J; Rossi, G; Schneider, D. P; Smith, Alexander; Vivek, M; Weaver, Benjamin A (IOP Publishing, 2020-09)
    We present the final Sloan Digital Sky Survey IV (SDSS-IV) quasar catalog from Data Release 16 of the extended Baryon Oscillation Spectroscopic Survey (eBOSS). This catalog comprises the largest selection of spectroscopically ...
  • Small scale clustering of late forming dark matter 
    Agarwal, S; Corasaniti, P.-S; Das, Subinoy; Rasera, Y (The American Physical Society, 2015-09-15)
    We perform a study of the nonlinear clustering of matter in the late-forming dark matter (LFDM) scenario in which dark matter results from the transition of a nonminimally coupled scalar field from radiation to collisionless ...
  • Small scale fluctuations in the F-region critical frequency at Kodaikanal 
    Sastri, J. H; Murthy, B. S (Japan Science and Technology Agency, 1977-03)
    Some preliminary results obtained on the small scale fluctuations in the F-region critical frequency at Kodaikanal (Dip 3.5 deg) using 1-min interval ionograms, are presented. Spectral analysis showed the fluctuations to ...
  • Smallest Scale Clumpy Star Formation in Stephan's Quintet Revealed from UV and IR Imaging 
    Joseph, P; George, K; Subramanian, S; Mondal, C; Subramaniam, A (IOP Publishing, 2022-09)
    The spatial distribution and physical sizes of star-forming clumps at the smallest scales provide valuable information on hierarchical star formation (SF). In this context, we report the sites of ongoing SF at ∼120 pc along ...
  • Smear correction of highly variable, frame-transfer CCD images with application to polarimetry 
    Iglesias, F. A; Feller, A; Nagaraju, K (Optical Society of America, 2015-07-01)
    Image smear, produced by the shutterless operation of frame-transfer CCD detectors, can be detrimental for many imaging applications. Existing algorithms used to numerically remove smear do not contemplate cases where ...

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