新疆天文台脉冲星数据检索

XAO pulsar data retrieval system

新疆天文台南山观测站25 m射电望远镜(简称NSRT) 2002年L波段常温接收机制冷改造完成后,脉冲星观测系统灵敏度达到了0.4 m Jy,实现了200多颗脉冲星的常年监测. NSRT通过近20年的观测产生了大量有价值的科学数据.南山观测站脉冲星数据通过300 Mb/s专线传输到70 km外的新疆天文台本部数据中心进行长期存储,通过南山观测站及新疆天文台本部的数据存储系统实现了脉冲星数据的远程异地容灾备份.元数据提取、数据归档及发布由位于新疆天文台本部的数据发布系统完成,截至2018年11月底已发布脉冲星观测数据87000多条,最大文件1 GB,脉冲星数据格式为PSRFITS.脉冲星数据服务提供了锥形检索及多目标约束检索,数据发布基于虚拟天文台标准并已将脉冲星数据服务注册到国际虚拟天文台联盟,用户可通过标准虚拟天文台工具实现检索、访问与处理.

Since the room temperature receiver was replaced by the L-band cryogenic receiver in 2002, the sensitivity of pulsar observation using NanShan 25-m Radio Telescope(NSRT), operated by Xinjiang Astronomical Observatory(XAO), has reached 0.4 m Jy, allowing regular monitoring for more than 200 pulsars. NSRT has produced large amount of valuable scientific data through nearly 20 years of observations. The pulsar data is synchronized to XAO headquarters for longterm storage through the 300 Mb/s dedicated line, and remote disaster tolerance backup is realized through the data storage system of NanShan Station and XAO headquarters. Metadata extraction, data archiving and release are completed by the data server which located in XAO headquarters. By the end of November 2018, more than 87000 pieces of pulsar observation data have been released, with the data format of PSRFITS. Pulsar data service provides cone search and multi-objective constrained retrieval. Data release is based on Virtual Observatory(VO) standard and pulsar data query service has been registered to the International Virtual Observatory Alliance(IVOA). Users can search, access and process NSRT pulsar data through VO tools.