DSA-10：定位快速射电暴的原型阵
DSA-10: A Prototype Array for Localizing Fast Radio Bursts
摘要：
深天气阵列10碟原型是一种仪器，旨在检测和定位快速射电暴与角秒精度在实时。它部署在欧文斯谷射电天文台，由10个直径4.5米的碟形天线组成，配备250 MHz带宽的双极化接收机，中心频率为1.4 GHz。20个输入信号被数字化，现场可编程门阵列用于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，并在所有输入的非相干和上执行快速射电暴的实时搜索。如果检测到脉冲，则将脉冲周围的原始数据写入磁盘以进行相干处理和成像。原型系统于2017年6月至2018年2月运行，进行漂移扫描搜索。来自蟹状星云脉冲星的巨大脉冲被用来测试探测和成像管道。10碟原型系统于2019年3月再次上线，并将在未来两年内逐步被新的DSA-110（110碟系统）取代，以提高灵敏度和定位精度。
英文摘要：
The Deep Synoptic Array 10 dish prototype is an instrument designed to detect and localise fast radio bursts with arcsecond accuracy in real time. Deployed at Owens Valley Radio Observatory, it consists of ten 4.5m diameter dishes, equipped with a 250MHz bandwidth dual polarisation receiver, centered at 1.4GHz. The 20 input signals are digitised 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 is written to disk for coherent processing and imaging. The prototype system was operational from June 2017 - February 2018 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 March 2019, and will gradually be replaced with the new DSA-110, a 110-dish system, over the next two years to improve sensitivity and localisation accuracy.
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