77 citations · 406 across the 34 of their papers we have counts for
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HINODE Observations of Coherent Lateral Motion of Penumbral Filaments during a X-class Flare
S. Gosain, P. Venkatakrishnan, Sanjiv Kumar Tiwari
The X-3.4 class flare of 13 December 2006 was observed with a high cadence of 2 minutes at 0.2 arc-sec resolution by HINODE/SOT FG instrument. The flare ribbons could be seen in G-…
3D evolution of a filament disappearance event observed by STEREO
S. Gosain, B. Schmieder, P. Venkatakrishnan +2
A filament disappearance event was observed on 22 May 2008 during our recent campaign JOP 178. The filament, situated in the southern hemisphere, showed sinistral chirality consist…
Phase III of USO Solar Vector Magnetograph
Sanjay Gosain, P. Venkatakrishnan
The Solar Vector Magnetograph (SVM) is a modern imaging spectropolarimeter installed at Udaipur Solar Observatory (USO). Earlier phases saw the development of the instrument using…
Effect of Polarimetric Noise on the Estimation of Twist and Magnetic Energy of Force-Free Fields
Sanjiv Kumar Tiwari, P. Venkatakrishnan, Sanjay Gosain +1
The force-free parameter , also known as helicity parameter or twist parameter, bears the same sign as the magnetic helicity under some restrictive conditions. The single global…
Evolution of helicity in NOAA 10923 over three consecutive solar rotations
Sanjiv Kumar Tiwari, Jayant Joshi, Sanjay Gosain +1
We have studied the evolution of magnetic helicity and chirality in an active region over three consecutive solar rotations. The region when it first appeared was named NOAA10923 a…