DSA-10: a prototype array for localizing fast radio bursts
DSA-10: a prototype array for localizing fast radio bursts
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DOI：
10.1093/mnras/stz2219
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发表时间：
2019-06
影响因子：
4.8
通讯作者：
J. Kocz;Vikram Ravi;M. Catha;Larry D'Addario;G. Hallinan;R. Hobbs;S. Kulkarni;J. Shi;H. Vedantham;H. Vedantham;Sander Weinreb;D. Woody
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文献类型：
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作者：
J. Kocz;Vikram Ravi;M. Catha;Larry D'Addario;G. Hallinan;R. Hobbs;S. Kulkarni;J. Shi;H. Vedantham;H. Vedantham;Sander Weinreb;D. Woody
深度综合阵列 10 盘原型 (DSA-10) 是一款设计用于以弧秒精度实时检测和定位快速射电爆发的仪器。它部署在欧文斯谷射电天文台，由十个直径为 4.5 米的碟形天线组成，配备了 250 MHz 带宽双极化接收器，中心频率为 1.4 GHz。 20 个输入信号被数字化，并使用现场可编程门阵列将数据转换到频域并通过以太网传输。一系列计算机服务器缓冲原始数据样本，并对所有输入的不相干总和执行快速无线电突发的实时搜索。如果检测到脉冲，则该脉冲周围的原始数据将被写入光盘以进行相干处理和成像。该原型系统于 2017 年 6 月至 2018 年 2 月期间运行，进行漂移扫描搜索。来自蟹状脉冲星的巨脉冲被用来测试探测和成像管道。 10 盘原型系统于 2019 年 3 月再次上线，并将在未来 2 年内逐步替换为新的 110 盘系统 DSA-110，以提高灵敏度和定位精度。
The Deep Synoptic Array 10-dish prototype (DSA-10) is an instrument designed to detect and localize fast radio bursts with arcsecond accuracy in real time. Deployed at Owens Valley Radio Observatory, it consists of ten 4.5-m diameter dishes, equipped with a 250-MHz bandwidth dual polarization receiver, centred at 1.4 GHz. The 20 input signals are digitized and field programmable gate arrays are used to transform the data to the frequency domain and transmit it over ethernet. A series of computer servers buffer both raw data samples and perform a real time search for fast radio bursts on the incoherent sum of all inputs. If a pulse is detected, the raw data surrounding the pulse are written to disc for coherent processing and imaging. The prototype system was operational from 2017 June to 2018 February conducting a drift scan search. Giant pulses from the Crab Pulsar were used to test the detection and imaging pipelines. The 10-dish prototype system was brought online again in 2019 March, and will gradually be replaced with the new DSA-110, a 110-dish system, over the next 2 yr to improve sensitivity and localization accuracy.