RT-2 Detection of Quasi-Periodic Pulsations in the 2009 July 5 Solar Hard X-ray Flare

TL;DR

This paper reports the detection of quasi-periodic pulsations in a solar flare's hard X-ray emissions, using data from RT-2 and RHESSI satellites, revealing pulsations at ~12 and ~15 seconds with potential period decrease over time.

Contribution

It is the first to identify quasi-periodic pulsations in the 2009 July 5 solar flare using combined RT-2 and RHESSI data, highlighting period variability.

Findings

Detection of pulsations at ~12 and ~15 seconds.

Marginal evidence for decreasing period over time.

Spectral analysis of the flare's X-ray emissions.

Abstract

We present the results of an analysis of hard X-ray observations of the C2.7 solar flare detected by the RT-2 Experiment onboard the Coronas - Photon satellite. We detect hard X-ray pulsations at periods of ~12 s and ~15 s. We find a marginal evidence for a decrease in period with time. We have augmented these results using the publicly available data from the RHESSI satellite. We present a spectral analysis and measure the spectral parameters.