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【摘 要】
：
Gamma-ray bursts(GRBs) are divided into two classes according to their durations.We investigate if the softness of bursts plays a role in the conventional class
【机 构】
：
AryabhattaResearchInstituteofObservationalSciences（ARIES）
【出 处】
：
中国科学：物理学、力学、天文学英文版
【发表日期】
：
2010年7期
【基金项目】
：
supported in part by the National Natural Science Foundation of China (Grant Nos. 10633010,10573005 and 10747001),the National Basic Research Program of China (Grant No. 2007CB815405),the financial su
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