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Digitized archive of the Kodaikanal images: Representative results of solar cycle variation from sunspot area determination
B. Ravindra, T. G. Priya, K. Amareswari +3
Photographic images are valuable data resources for studying long term changes in the solar magnetic field and its influence on the Earth's climate and weather. We digitized more t…
Analysis of a Fragmenting Sunspot using Hinode Observations
Rohan E. Louis, B. Ravindra, Shibu K. Mathew +3
We employ high resolution filtergrams and polarimetric measurements from Hinode to follow the evolution of a sunspot for eight days starting on June 28, 2007. The imaging data were…
Dynamics of Coronal Bright Points as seen by Sun Watcher using Active Pixel System detector and Image Processing (SWAP), Atmospheric Imaging Assembly AIA), and Helioseismic and Magnetic Imager (HMI)
K. Chandrashekhar, S. Krishna Prasad, D. Banerjee +2
The \textit{Sun Watcher using Active Pixel system detector and Image Processing}(SWAP) on board the \textit{PRoject for OnBoard Autonomy\todash 2} (PROBA\todash 2) spacecraft provi…
Rapid Disappearance of Penumbra-Like Features Near a Flaring Polarity Inversion Line: The Hinode Observations
B. Ravindra, Sanjay Gosain
We present the observations of penumbra like features (PLFs) near a polarity inversion line (PIL) of flaring region. The PIL is located at the moat boundary of active region (NOAA…
Properties of Umbral Dots from Stray Light Corrected Hinode Filtergrams
Rohan E. Louis, Shibu K. Mathew, Luis R. Bellot Rubio +3
High resolution blue continuum filtergrams from Hinode are employed to study the umbral fine structure of a regular unipolar sunspot. The removal of scattered light from the images…
Twin Telescope observations of the Sun at Kodaikanal Observatory
Jagdev Singh, B. Ravindra
We report the design, fabrication and installation of a 'Twin Telescope' at Kodaikanal Observatory intended to augment the ongoing synoptic observations of the Sun that has been ca…