Observation of the 2005 January 20 GLE Event Using Yangbajing Solar Neutron Telescope &amp; Neutron Monitor

ZHU Feng-Rong; WANG Rui-Guang; TANG Yun-Qiu; LU Hong; CHEN Song-Zhan; CHENG Ning; FENG Zhao-Yang; GUO Yi-Qing; SHI Feng; WANG Yun-Gang; WANG Yue; TAN You-Heng; ZHANG Hu

Chinese Physics C> 2007, Vol. 31> Issue(4) : 341-344

Observation of the 2005 January 20 GLE Event Using Yangbajing Solar Neutron Telescope & Neutron Monitor

Key Lab. of Particle Astrophysics, Institute of High Energy Physics, CAS, Beijing 100049, China2 National Center for Space Weather, National Satellite Meteorological Center, Beijing 100081, China

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Abstract：
A solar cosmic rays Ground Level Enhancement(GLE) event associated with a X7.1/2b solar flare in 2005 January 20 was observed by the Yangbajing solar neutron telescope(SNT) and neutron monitor(NM), located at Yangbajing Tibet(90.53°E, 30.11°N, 4310m a.s.l) with the highest vertical geomagnetic cut-off rigidity of 14.1GV in NM network. The statistical significance of the counting rate enhancement recorded by solar neutron telescope in >40MeV channel was 3.7σ in the time window of 07:00—07:05UT and 6.0σ in the time window of 07:00—07:20UT, respectively. The onset time of 06:51—06:52UT for this GLE event was clearly observed by the Yangbajing NM. Our observation indicates that solar protons have been accelerated up to energies of >10GeV during this solar event.

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ZHU Feng-Rong, WANG Rui-Guang, TANG Yun-Qiu, LU Hong, CHEN Song-Zhan, CHENG Ning, FENG Zhao-Yang, GUO Yi-Qing, SHI Feng, WANG Yun-Gang, WANG Yue, TAN You-Heng, ZHANG Hu, Observation of the 2005 January 20 GLE Event Using Yangbajing Solar Neutron Telescope & Neutron Monitor[J]. Chinese Physics C, 2007, 31(4): 341-344.

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Received: 2006-07-24
Revised: 2006-11-15

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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Observation of the 2005 January 20 GLE Event Using Yangbajing Solar Neutron Telescope & Neutron Monitor

Corresponding author: ZHU Feng-Rong,

Key Lab. of Particle Astrophysics, Institute of High Energy Physics, CAS, Beijing 100049, China2 National Center for Space Weather, National Satellite Meteorological Center, Beijing 100081, China

Received Date: 2006-07-24

Accepted Date: 2006-11-15

Available Online: 2007-04-05

Abstract: A solar cosmic rays Ground Level Enhancement(GLE) event associated with a X7.1/2b solar flare in 2005 January 20 was observed by the Yangbajing solar neutron telescope(SNT) and neutron monitor(NM), located at Yangbajing Tibet(90.53°E, 30.11°N, 4310m a.s.l) with the highest vertical geomagnetic cut-off rigidity of 14.1GV in NM network. The statistical significance of the counting rate enhancement recorded by solar neutron telescope in >40MeV channel was 3.7σ in the time window of 07:00—07:05UT and 6.0σ in the time window of 07:00—07:20UT, respectively. The onset time of 06:51—06:52UT for this GLE event was clearly observed by the Yangbajing NM. Our observation indicates that solar protons have been accelerated up to energies of >10GeV during this solar event.

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Observation of the 2005 January 20 GLE Event Using Yangbajing Solar Neutron Telescope & Neutron Monitor

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Observation of the 2005 January 20 GLE Event Using Yangbajing Solar Neutron Telescope & Neutron Monitor

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