M. D. Fivian

TL;DR: RHESSI as discussed by the authors is a Principal Investigator (PI) mission, where the PI is responsible for all aspects of the mission except the launch vehicle, and is designed to investigate particle acceleration and energy release in solar flares, through imaging and spectroscopy of hard X-ray/gamma-ray continua emitted by energetic electrons, and of gamma-ray lines produced by energetic ions.

TL;DR: In this paper, the authors investigate the source height of chromospheric footpoints in white light (WL) and hard X-rays (HXR) and find the WL and HXR (?30 keV) centroids to be largely co-spatial and from similar heights for all events, with altitudes around 800 km above the photosphere or 300?450 km above a limb height.

TL;DR: The shape of the Sun subtly reflects its rotation and internal flows and relates the larger radius values to magnetic elements in the enhanced network and uses the correlation to correct for it as a systematic error term in the oblateness measurement.

TL;DR: In this article, the authors derived and investigated for the first time the correlation between cumulative deposited energy at the footpoints and their separation and showed an excellent correlation for most of the time intervals, however, despite the good correlation, the derived amount of released magnetic energy is far too small to account for the energy in HXR-producing electrons.

TL;DR: In this paper, the Reuven Ramaty High-Energy Spectroscopic Imager (HESI) was used to detect anomalous increase of the solar oblateness.