Ionization of the lower ionosphere by γ-rays from a magnetar:: Detection of a low energy (3-10 keV) component

被引：61

作者：

Inan, US ^{[1
]}

Lehtinen, NG

Lev-Tov, SJ

Johnson, MP

Bell, TF

Hurley, K

机构：

[1] Stanford Univ, Star Lab, Stanford, CA 94305 USA

[2] Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA

来源：

GEOPHYSICAL RESEARCH LETTERS | 1999年 / 26卷 / 22期

关键词：

D O I：

10.1029/1999GL010690

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

A gigantic periodic flare from the soft gamma repeater SGR 1900+14 produced enhanced ionization at ionospheric altitudes of 30 to 90 km, which was observed as unusually large amplitude and phase changes of very low frequency (VLF) signals propagating in the Earth-ionosphere waveguide. The VLF signals remained perturbed for similar to 5 min and exhibited the 5.16 s periodicity of the giant flare detected on the Ulysses spacecraft [Hurley et al., 1999]. Quantitative analysis indicates the presence of an intense initial low energy (3-10 keV) photon component that was not detectable by the Ulysses instrument.

引用

页码：3357 / 3360

页数：4

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