Analysis of solar gamma rays and solar neutrons detected on March 7th and September 25th of 2011 by Ground Level Neutron Telescopes, SEDA-FIB and FERMI-LAT

TL;DR

This study analyzes multiple detections of solar gamma rays and neutrons from two solar flares in 2011 using ground-based and space-based detectors, proposing a unified model for these high-energy solar phenomena.

Contribution

It presents a comprehensive analysis of solar gamma ray and neutron detections from different instruments during two solar flares, introducing a unified model for these observations.

Findings

Detection of solar gamma rays on March 7, 2011, with high statistical significance.

Detection of solar neutrons by SEDA-FIB with significant confidence.

Observation of high-energy gamma rays by FERMI-LAT during the same event.

Abstract

At the 33rd ICRC, we reported the possible detection of solar gamma rays by a ground level detector and later re-examined this event. On March 7, 2011, the solar neutron telescope (SNT) located at Mt. Sierra Negra, Mexico (4,600 m) observed enhancements of the counting rate from 19:49 to 20:02 UT and from 20:50 to 21:01 UT. The statistical significance was 9.7sigma and 8.5sigma, respectively. This paper discusses the possibility of using this mountain detector to detect solar gamma rays. In association with this event, the solar neutron detector SEDA-FIB onboard the International Space Station has also detected solar neutrons with a statistical significance of 7.5sigma. The FERMI-LAT detector also observed high-energy gamma rays from this flare with a statistical significance of 6.7sigma. We thus attempted to make a unified model to explain this data. In this paper, we report on another candidate for solar gamma rays detected on September 25th, 2011 by the SNT located in Tibet (4,300 m) from 04:37 to 04:47 UT with a statistical significance of 8.0sigma (by the Li-Ma method).