一颗新的γ射线脉冲星：PSR0740－28  

A POSSIBLE NEW GAMMA-RAY PULSAR: PSR0740-28

作　　者：宋黎明[1] 陆埮[1] 马宇蒨[1] 

机构地区：[1]南京大学天文系,中国科学院高能物理研究所

出　　处：《天文学报》1995年第2期208-212,共5页Acta Astronomica Sinica

基　　金：国家攀登计划;国家自然科学基金;国家教委博士点基金

摘　　要：本文作者对ＣＯＳ－Ｂ卫星的两次观测数据进行了周期折叠分析，获得了来自ＰＳＲ０７４０－２８方向上的γ光子的周期位相脉冲结构．从两次不同观测数据中获得的相位图具有相似的结构，其对应的周期和周期变率值都在射电预期值附近；显著性分析表明，随机出现上述两个位相结构的概率不大于２×１０－５．由此我们相信ＰＳＲ０７４０－２８是一颗新的γ射线脉冲星．Based on COS-B data analyses, the folding method has been used to search for new gamma-ray pulsars. The gamma-ray photons from the direction of PSR0740-28 are found to appear clearly pulsed phase structure. Especially, the phase structure from obs. 21 is found to be very similar to that from obs. 40, and their peaks match almost exactly. The results of both obs. 21 and obs. 40, including periods and period derivatives, agree with that predicted from radio observations very well.Thus, PSR0740-28 could be very probably a new gamma-ray pulsar.

关 键 词：脉冲星 γ射线辐射观测 数据处理 

分 类 号：P145.6[天文地球—天体物理]