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  • Progressive prediction of turbulence using wave-front sensor data in adaptive optics using data mining 
    Vyas, A; Roopashree, M. B; Prasad, B. R (Macmillan Publishers India Ltd., 2009)
    Nullifying the servo bandwidth errors improves the strehl ratio by a substantial quantity in adaptive optics systems. An effective method for predicting atmospheric turbulence to reduce servo bandwidth errors in real time ...
  • Project Kalki - a Sky Survey with 45-CM Schmidt Telescope - I 
    Rajamohan, R; Bhattacharyya, J. C; Kuppuswamy, K; Paranjpye, A (Astronomical Society of Indian, 1987-12)
    A brief description of the sky survey project taken up with the 45 cm Schmidt telescope of the Vainu Bappu Observatory at Kavalur is given. Positions of 11 asteroids detected on plates taken during 1987 Feburary-March are reported
  • Project Kalki - A sky survey with the Schmidt telescope. 2 
    Rajamohan, R; Shankar, P. N; Bhattacharyya, J. C; Kuppuswamy, K; Paranjpye, A (Astronomical Society of Indian, 1988-03)
    The region of the sky photographed with the 45cm Schmidt telescope during 1987 March-May and the position of the asteroids detected on these plates are reported in this paper. Out of the 29 asteroids observed four have ...
  • Projection methods for line radiative transfer in spherical media 
    Anusha, L. S; Nagendra, K. N (Societa Astronomica Italiana, 2009)
    An efficient numerical method called the Preconditioned Bi-Conjugate Gradient (Pre-BiCG) method is presented for the solution of radiative transfer equation in spherical geometry. A variant of this method called Stabilized ...
  • Prolonged intranight optical quiescence of the classical BL Lac object PKS 0735+178 
    Goyal, A; Gopal-Krishna; Anupama, G. C; Sahu, D. K; Sagar, R; Britzen, S; Karazous, M; Aller, M. F; Aller, H. D (Astronomical Society of the Pacific, 2009-09)
    We report our extensive intranight optical monitoring of the well known low-energy peaked (LBL) BL Lac object PKS 0735+178. This long-term follow-up consists of R-band monitoring for a minimum duration of ˜ 4 hours, on 17 ...
  • Prominence activity (1905–1952) 
    Ananthakrishnan, R (Indian Academy of Sciences, 1954-08)
  • Prominence activity and the sunspot cycle 
    Ananthakrishnan, R (Nature Publishing Group, 1952-07)
    The relationship that exists between the distribution and frequencies of prominences at the limb of the sun and the sunspot cycle has been discussed by several workers1. The most outstanding feature is the existence of two ...
  • The Prominence Driven Forced Reconnection in the Solar Corona and Associated Plasma Dynamics 
    Srivastava, A. K; Mishra, S. K; Jelínek, P (IOP Publishing, 2021-10-01)
    Using the multitemperature observations from SDO/AIA on 2019 December 30, we provide a signature of prominence driven forced magnetic reconnection in the corona and associated plasma dynamics from 09:20 UT to 10:38 UT. ...
  • Prominence Eruption Initiated by Helical Kink Instability of an Embedded Flux Rope 
    Vemareddy, P; Gopalswamy, N; Ravindra, B (IOP Publishing, 2017-11)
    We study the triggering mechanism of a limb-prominence eruption and the associated coronal mass ejection ( CME ) near AR 12342 using Solar Dynamics Observatory and Large Angle and Spectrometric Coronagraph / Solar ...
  • Prominence periodicities 
    Royds, T (Indian Institute of Astrophysics, Bangalore, 1913-08-18)
  • Prominences and radiation pressure 
    Royds, T (Government Observatory, Madras, 1932-03-21)
  • Prominences in 1974 
    Bappu, M. K. V (Royal Astronomical Society, 1976-03)
  • Prominences in 1975 
    Bappu, M. K. V (Royal Astronomical Society, 1977-06)
  • Proof of absence of spooky action at a distance in quantum correlations 
    Unnikrishnan, C. S (Indian Academy of Sciences, 2002-08)
    I prove that there is no spooky action at a distance and nonlocal state-reduction during measurements on quantum entangled systems. The prediction of quantum theory as well as experimental results are in conflict with the ...
  • Propagating disturbances along a coronal loop from simultaneous EUV imaging and spectroscopic observations 
    Datta, A; Prasad, S. K; Banerjee, D (IOP Publishing, 2015-07)
    Propagating disturbances (PDs) were studied along an active region loop using simultaneous imaging and spectroscopy. An image sequence recorded in the Fe IX/Fe X 171Å channel, from TRACE and spectral data in the Si XII ...
  • Propagating disturbances along fan-like coronal loops in an active region 
    Mandal, Sudip; Samanta, T; Banerjee, D; Krishna Prasad, S; Teriaca, L (IOP Publishing, 2015-11)
    Propagating disturbances are often observed in active region fan-like coronal loops. They were thought to be due to slow mode magnetohydrodynamic waves based on some of the observed properties. However, recent studies ...
  • Propagating disturbances in the solar corona and spicular connection 
    Samanta, T; Pant, V; Banerjee, D (IOP Publishing, 2015-12-10)
    Spicules are small, hairy-like structures seen at the solar limb, mainly at chromospheric and transition region lines. They generally live for 3–10 minutes. We study these spicules in a south polar region of the Sun with ...
  • Propagating intensity disturbances in polar corona as seen from AIA/SDO 
    Krishna Prasad, S; Banerjee, D; Gupta, G. R (EDP Sciences, 2011-04)
    Context. Polar corona is often explored to find the energy source for the acceleration of the fast solar wind. Earlier observations show omni-presence of quasi-periodic disturbances, traveling outward, which is believed ...
  • Propagating MHD waves in coronal holes 
    Banerjee, D; Teriaca, L; Gupta, G. R (Springer, 2011-07)
    Coronal holes are the coolest and darkest regions of the upper solar atmosphere, as observed both on the solar disk and above the solar limb. Coronal holes are associated with rapidly expanding open magnetic fields and the ...
  • Propagating waves in polar coronal holes as seen by SUMER & EIS 
    Banerjee, D; Teriaca, L; Gupta, G. R; Imada, S; Stenborg, G; Solanki, S. K (EDP Sciences, 2009-06)
    Context: To study the dynamics of coronal holes and the role of waves in the acceleration of the solar wind, spectral observations were performed over polar coronal hole regions with the SUMER spectrometer on SoHO and the ...

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