乌鲁木齐25m射电望远镜的单天线观测研究

张　晋1　王　娜1,2,3　艾 力·伊1　加尔肯1

艾力·玉1　张洪波1　刘　祥1

(1. 中国科学院中心乌鲁木齐天文站　乌鲁木齐 830011)

(2. 北京大学天文系　北京　100871)

(3.中国科学院--北京大学联合北京天体物理中心　北京　100871)

摘　　　要

自1993年乌鲁木齐天文站25m射电望远镜建成以来，除了不断完善VLBI 观测系统外，还选择发展了具有科学价值的单天线天体物理观测课题。其中 基于常温接收机的脉冲星脉冲到达时间观测系统已经于1999年5～6月 间建成。该系统建立在25m射电天线的18cm波段上，消色散采用了 2×128×2.5MHz多通道滤波器和数字化器, 并由PC机完成数据采集。同时进行 的脉冲星工作还有92cm及其它波段的脉冲轮廓监测，对0329+54的多波段 观测得到了它的频谱。在25m天线的1.3cm波段上建立了基于声表面波频谱 仪和频率综合器的分子谱线观测系统，对水脉泽的观测已经发现了十几个可 能的水脉泽源，观测结果正在认证当中。

Single Dish Astrophysics Observations atU rumqi Astronomical Observatory

Zhang Jin1 Wang Na1,2,3 Esamdin Ali1 Esimbek Jarken1 Yusup Aili1 Zhang Hongbo1 LIU Xiang1

(1．Urumqi Astronomical Observatory, Chinese Academy of Sciences, Urumqi 830011)

(2．Astronomy Department, Peking University, Beijing 100871)

(3．CAS-PKU Joint Beijing Astrophysics Center, Beijing 100871)

Abstract

Since the building up of Urumqi 25m radio telescope in 1993, except improving the VLBI system, we have developed the single dish astrophysics observational systems. Among them, the pulsar timing system was built at 18cm, which has been operational since mid-1999 with a receiver working in room temperature . Dedispersing is provided by a 2×128×2.5MHz filterbank based on PC data acquisition. Monitoring of pulse profile and intensity on 92cm to some pulsars are in progress. We obtained the spectrum of PSR B0329+54 by multi-frequency observations. Acoustic surface wave spectrometer and frequency synthesizer form the molecules spectrum observation system, have been developed at 1.3cm frequency. H2O maser observations have found more than 10 possible sources.

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