| 基于DBBC＋Mark5B记录系统的脉冲星观测 |
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| 引用本文： | 李志玄,汪敏,郝龙飞,罗近涛.基于DBBC＋Mark5B记录系统的脉冲星观测[J].云南天文台台刊,2011(1):1-7. |
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| 作者姓名： | 李志玄 汪敏 郝龙飞 罗近涛 |
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| 作者单位： | [1]中国科学院国家天文台云南天文台,云南昆明650011 [2]中国科学院研究生院,北京100049 [3]中国科学院天体结构与演化重点实验室,云南昆明650011 [4]中国科学院上海天文台,上海200030 |
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| 基金项目： | 基金项目：国家自然科学天文联合基金（10978006）资助. |
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| 摘 要： | 2009年11月，云南天文台射电天文研究团组采用40m射电望远镜以及基于DBBC（Digital Base Band Conveter）和Mark5B的VLBI记录系统对PSRJ08354510和PSRJ0332＋5434进行了观测。观测选用S波段右旋圆极化信号，起始频率为2206．99MHz，总带宽为32MHz。对数据进行相干消色散和平均后，得到PSRJ0332＋5434的单脉冲图像和两颗脉冲星的平均脉冲轮廓。由平均轮廓的展宽随时间的变化关系，对脉冲星的视周期作了一定修正后，得到信噪比更高的平均轮廓图。最后对轮廓的信噪比随时间的变化作了初步分析，由此可了解整个系统在观测时的稳定性。
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| 关 键 词： | 脉冲星PSR J0835-4510 脉冲星PSR J0332＋5434 40 m射电望远镜 VLBI终端 相干消色散 |
Observations of Pulsars with a Record System Combining a DBBC and a Mark 5B |
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| Li Zhixuan,Wang Min,＇,Hao Longfei,Luo Jintao.Observations of Pulsars with a Record System Combining a DBBC and a Mark 5B[J].Publications of the Yunnan Observatoty,2011(1):1-7. |
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| Authors: | Li Zhixuan Wang Min ＇ Hao Longfei Luo Jintao |
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| Institution: | 2＇4 ( 1. Yunnan Observatory, Chinese Academy of Sciences, Kunming 650011, China, Email： lzx@ ynao. ae. en; 2. Graduate University of the Chinese Academy of Sciences, Beijing 100049, China; Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650011, China 4. Shanghai Astronomical Observatory, Chinese Academy of Seienees, Shanghai 200030, China) |
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| Abstract: | In November 2009, some observations of the pulsars PSR J0332 ＋ 5434 and PSR J0835 - 4510 were carried out by the radio astronomy group of the YNAO（the Yunnan Observatory）, with a VLBI backend based on a DBBC （Digital Baseband Conveter）and Mark 5B combination. A RCP（Right Circular Polarization） S-band detection range was selected for the observations. The range has a width of 32 MHz and a starting frequency at 2 206.99 MHz. After the de-dispersing and averaging, single pulses of PSR J0332 ＋ 5434 and mean profiles of both pulsars were obtained. We derive mean profiles of higher signal-to-noise ratios （S/N） by improving the periods of the pulses. We further analyze the relation between S/N of a mean profile and integration time, which yields the estimation of the stability of the observation system. |
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| Keywords: | Pulsar PSR J0835 - 4510 Pulsar PSR J0332 ＋ 5434 40 m Radio Telescope VLBI backend Coherent de-dispersion |
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