IIAP Publications: Recent submissions

  • Optical and NIR observations of the nearby type Ia supernova SN 2014J 
    Srivastav, S; Ninan, J. P; Kumar, B; Anupama, G. C; Sahu, D. K; Ojha, D. K; Prabhu, T. P (Oxford University Press on behalf of the Royal Astronomical Society, 2016-03)
    Optical and NIR observations of the Type Ia supernova SN 2014J in M82 are presented. The observed light curves are found to be similar to normal Type Ia supernovae (SNe Ia), with a decline rate parameter m 15 ( B ...
  • Very long baseline interferometry with the SKA 
    Paragi, Z; Godfrey, L; Reynolds, C; Rioja, M. J; Deller, A; Zhang, B; Gurvits, L; Bietenholz, M; Szomoru, A; Bignall, H. E; Boven, P; Charlot, P; Dodson, R; Frey, S; Garrett, M. A; Imai, H; Lobanov, A; Reid, M. J; Ros, E; Van Langevelde, H. J; Zensus, A. J; Zheng, X W; Alberdi, A; Agudo, I; An, T; Argo, M; Beswick, R; Biggs, A; Brunthaler, A; Campbell, B; Cimo, G; Colomer, F; Corbel, S; Conway, J. E; Cseh, D; Deane, R; Falcke, H .D. E; Gawronski, M; Gaylard, M; Giovannini, G; Giroletti, M; Goddi, C; Goedhart, S; Gomez, J. L; Gunn, A; Kharb, P; Kloeckner, H. R; Koerding, E; Kovalev, Y; Kunert-Bajraszewska, M; Lindqvist, M; Lister, M; Mantovani, F; Marti-Vidal, I; Mezcua, M; McKean, J; Middelberg, E; Miller-Jones, J. C. A; Moldon, J; Muxlow, T; O'Brien, T; Perez-Torres, M; Pogrebenko, S. V; Quick, J; Rushton, A; Schilizzi, R; Smirnov, O; Sohn, B .W; Surcis, G; Taylor, G. B; Tingay, S; Tudose, V. M; van der Horst, A; van Leeuwen, J; Venturi, T; Vermeulen, R; Vlemmings, W. H. T; de Witt, A; Wucknitz, O; Yang, J; Gabanyi, K; Jung, T (International School for Advanced Studies (SISSA), 2015-04)
    Adding VLBI capability to the SKA arrays will greatly broaden the science of the SKA, and is feasible within the current specifications. SKA-VLBI can be initially implemented by providing phased-array outputs for SKA1-MID ...
  • From nearby low luminosity AGN to High Redshift Radio Galaxies: science interests with square kilometre array 
    Kharb, P; Lal, D. V; Singh, V; Bagchi, J; Ishwara-Chandra, C. H; Hota, A; Konar, C; Wadadekar, Yogesh; Shastri, P; Mousumi Das; Baliyan, K; Nath, B. B; M. Pandey-Pommier (Springer, 2016-12)
    We present detailed science cases that a large fraction of the Indian AGN community is interested in pursuing with the upcoming Square Kilometre Array (SKA). These interests range from understanding low luminosity active ...
  • Breaking the habit: the peculiar 2016 eruption of the unique recurrent nova M31N 2008-12a 
    Henze, M; Darnley, M. J; Williams, S. C; Kato, M M; Hachisu, I; Anupama, G. C; Arai, A; Boyd, D; Burke, D; Ciardullo, R; Chinetti, K; Cook, L. M; Cook, M. J; Erdman, P; Gao, X; Harris, B; Hartmann, D. H; Hornoch, K; Chuck Horst, J; Hounsel, R; Husar, D; Itagaki, K; Kabashima, F; Kafka, S; Kaur, A; Kiyota, S; Kojiguchi, N; Kucakova, H; Kuramoto, K; Maehara, H; Mantero, A; Masci, F. J; Matsumoto, K; Naito, H; Ness, J.-U; Nishiyama, K; Oksanen, A; Osborne, J. P; Page, K. L; Paunzen, E; Pavana, M; Pickard, R; Prieto-Arranz, J; Rodri­guez-Gil, P; Sala, G; Sano, Y; Shafter, A. W; Sugiura, Y; Tan, H; Tordai, T; Vrastil, J; 22 others (IOP Publishing, 2018-04-10)
    Since its discovery in 2008, the Andromeda galaxy nova M31N 2008-12a has been observed in eruption every single year. This unprecedented frequency indicates an extreme object, with a massive white dwarf and a high accretion ...
  • Broad-band polarimetric investigation of the Type II-plateau supernova 2013ej 
    Brajesh Kumar; Pandey, S. B; Eswaraiah, C; Kawabata, K. S (Oxford University Press on behalf of the Royal Astronomical Society, 2016-03)
    We present results based on follow-up observations of the Type II-plateau supernova (II-P SN) 2013ej at six epochs spanning a total duration of ∼ 37 d. The R C -band linear polarimetric observations were carried out ...
  • Estimation of asymmetries in point spread function for the echelle spectrograph operating at Vainu Bappu Telescope for high precision radial velocity studies 
    Sireesha, C; Banyal, R. K; Sriram, S (SPIE--The International Society for Optical Engineering, 2018-07)
    Precision in the Radial Velocity (RV) measurements depends upon the efficiency of the technique to remove instrumental artifacts from stellar measurements. Iodine absorption cell technique is being implemented for high ...
  • Irradiation effects in close binaries in an electron scattering medium 
    Varghese, B. A; Srinivasa Rao, M (Springer, 2016-03)
    In a close binary system, the effects of irradiation are studied from an extended surface of the secondary component on the atmosphere of the primary. Primary and the secondary components are assumed to have equal radii ...
  • Gravitational waves: some less discussed intriguing issues 
    Sivaram, C (World Scientific Publishing Co., 2015-10)
    Attempts to detect gravitational waves is actively in progress with sophisticated devices like LIGO setup across continents. Despite being predicted almost 100 years ago, there has so far been no direct detection of these ...
  • The solar ultraviolet imaging telescope onboard Aditya-L1 
    Ghosh, Avyarthana; Chatterjee, Subhamoy; Khan, Aafaque R; Tripathi, Durgesh; Ramaprakash, A. N; Banerjee, D; Chordia, P; Gandorfer, Achim; Krivova, N.A; Nandy, D; Rajarshi, Chaitanya; Solanki, S. K; Sriram, S (SPIE-The International Society for Optical Engineering, 2016-07)
    The Solar Ultraviolet Imaging Telescope (SUIT) is an instrument onboard the Aditya-L1 spacecraft, the first dedicated solar mission of the Indian Space Research Organization (ISRO), which will be put in a halo orbit at the ...
  • Latitude character and evolution of Gnevyshev gap 
    Pandey, K. K; Hiremath, K. M; Yellaiah, G (Springer, 2017-06)
    The time interval, between two highest peaks of the sunspot maximum, during which activity energy substantially absorbed is called Gnevyshev gap. In this study we focus on mysterious evolution of the Gnevyshev gap by ...
  • Long-term optical flux and colour variability in quasars 
    Sukanya, N; Stalin, C. S; Jeyakumar, S; Praveen, D; Dhani, A; Damle, R (IOP Publishing, 2016-02)
    We have used optical V and R band observations from the Massive Compact Halo Object (MACHO) project on a sample of 59 quasars behind the Magellan ic clouds to study their long term optical flux and colour ...
  • Variation in the width of transition region network boundaries 
    Raju, K. P (Springer, 2016-12)
    The transition region network seen in solar extreme ultraviolet (EUV) lines is the extension of the chromospheric network. The network appears as an irregular web-like pattern over the solar surface outside active regions. ...
  • Model of a fluxtube with a twisted magnetic field in the stratified solar atmosphere 
    Sen, Samrat; Mangalam, A (Elsevier B.V, 2018-01-15)
    We build a single vertical straight magnetic fluxtube spanning the solar photosphere and the transition region which does not expand with height. We assume that the fluxtube containing twisted magnetic fields is in ...
  • Transverse oscillations in a coronal loop triggered by a jet 
    Sarkar, S; Pant, V; Srivastava, A. K; Banerjee, D (Springer, 2016-11)
    We detect and analyse transverse oscillations in a coronal loop, lying at the south–east limb of the Sun as seen from the Atmospheric Imaging Assembly (AIA) onboard the Solar Dynamics Observatory (SDO). The jet is believed ...
  • The estimation of the instrumental polarization and crosstalk at the focus of the mid-infrared imaging system for the Thirty Meter Telescope 
    Ramya, M. Anche; Packham, Chris; Anupama, G. C; Sankarasubramanian, K; Maheswar, G; Manoj, P (SPIE--The International Society for Optical Engineering, 2018-07)
    The Thirty Meter Telescope (TMT) is a proposed future generation telescope which will be located on either Maunakea, Hawaii or La Palma in the Canary islands. A thermal-infrared (TIR) imager and spectrometer (MICHI) combined ...
  • Estimation of polarization aberrations and its effect on the point spread function of the Thirty Meter Telescope 
    Ramya, M. Anche; Anupama, G. C; Sriram, S; Sankarasubramanian, K; Skidmore, W (SPIE--The International Society for Optical Engineering, 2018-07)
    The Thirty Meter Telescope (TMT) is a future generation telescope proposed to be located in Mauna Kea, Hawaii or in La Palma in the Canary Islands. The telescope will have a segmented primary and an inclined tertiary mirror. ...
  • Abundance analysis of SDSS J134338.67+484426.6; an extremely metal-poor star from the MARVELS pre-survey 
    Susmitha Rani, A; Sivarani, T; Beers, T. C; Fleming, S; Mahadevan, S; Ge, J (Oxford University Press on behalf of the Royal Astronomical Society, 2016-05)
    We present an elemental-abundance analysis of an extremely metal-poor (EMP; [Fe/H] <−3.0) star, SDSS J134338.67+484426.6, identified during the course of the Multi-object Apache Point Observatory Radial Velocity Exoplanet ...
  • Investigating the AGN activity and black hole masses in low surface brightness galaxies 
    Subramanian, S; Ramya, S; Das, M; George, K; Sivarani, T; Prabhu, T. P (International Astronomical Union, 2016-02)
    We present an analysis of the optical nuclear spectra from the active galactic nuclei (AGN) in a sample of giant low surface brightness (GLSB) galaxies. GLSB galaxies are extreme late type spirals that are large, isolated ...
  • Solar spectropolarimetry of Ca II 8542 Å line: polarimeter development, calibration, and preliminary observations 
    Hemanth, P; Nagaraju, K; Ravindra, B; Ramesh, K. B (SPIE-The International Society for Optical Engineering, 2018-11)
    Chromospheric magnetic fields are of paramount importance in understanding the dynamics of energetic events in the solar atmosphere. At the Kodaikanal Solar Observatory, several polarimeters were developed in the past to ...
  • New features in the curvaton model 
    Pravabati, C; Huang, Q. G (The American Physical Society, 2011-01)
    We demonstrate novel features in the behavior of the second- and third-order nonlinearity parameters of the curvature perturbation, namely f NL and g NL , arising from nonlinear motion of the curvaton field. ...

Search DSpace


Browse

My Account