K. Watanabe

TL;DR: In this paper, the authors reported the unsaturated gamma-ray profile for the first 600 ms of the SGR 1806-20 massive flare, with a time resolution of 5.48 ms, indicating either that the energy release mechanism was extremely efficient or that the interior magnetic field is much stronger than the external dipole field.

TL;DR: In this article, the authors used the time profiles of the γ-ray lines to explain the time profile of the ground-based neutron monitor and showed that neutrons were produced at the same time as the X-ray emission.

TL;DR: In this article, a model of the impulsive neutron emission at the time of the X-ray/γ-ray peak can explain the main peaks of all the detected neutron signals, but failed to explain the long tailed decaying phase.

TL;DR: In this paper, two remarkable solar neutrons events were observed by the ground-based neutron monitors during the period when the Sun was intensely active on October-November 2003, during which the neutrons were produced at the same time as the gamma-ray emission.

TL;DR: The first detection of solar neutrons on the ground associated with a solar flare with an X-ray class smaller than X8 was reported in solar cycle 23 as mentioned in this paper, where the statistical significance of the detection is 5.5 σ.