A Synoptic VLBI Technique for Localizing Nonrepeating Fast Radio Bursts with CHIME/FRB
A Synoptic VLBI Technique for Localizing Nonrepeating Fast Radio Bursts with CHIME/FRB
复制标题
用CHIME/FRB定位非重复快速射电暴的天气VLBI技术
DOI：
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发表时间：
2020
期刊：
影响因子：
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通讯作者：
K. Vanderlinde
中科院分区：
文献类型：
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作者：
C. Leung;J. Mena;K. Masui;M. Bhardwaj;P. Boyle;C. Brar;Mathieu Bruneault;T. Cassanelli;D. Cubranic;J. Kaczmarek;V. Kaspi;T. Landecker;D. Michilli;N. Milutinovic;C. Patel;A. Renard;P. Sanghavi;P. Scholz;I. Stairs;K. Vanderlinde
我们演示了两个快速射电暴（FRB）的盲干涉检测和定位与subarcminute精度的400米基线之间的加拿大氢强度测绘实验（CHIME）和CHIME探路者。在与甚长基线干涉测量（VLBI）相同的精神下，望远镜被同步到单独的时钟，并且信道化的电压（在本文中称为基带）数据被保存到磁盘上，并离线执行相关。盲FRB搜索所需的同时宽视场和高灵敏度意味着高数据速率-CHIME为6.5 TB/s，Pathfinder为0.8 Tb s-1。由于如此高的数据速率无法持续保存，我们将来自两台望远镜的数据缓存在本地内存中，并在收到CHIME快速射电暴仪器（CHIME/FRB）的低延迟触发后写入磁盘。两台望远镜的deg2视场允许我们使用现场校准器来同步两台望远镜，而不需要单独的校准器观测或原子定时标准。除了我们的FRB观测，我们还分析了来自双星B0329 + 54和B0355 + 54的明亮单脉冲，以表征系统定位误差。我们的研究结果表明，成功实施的关键软件，触发和校准的挑战CHIME/FRB支腿：圆柱VLBI支腿望远镜，沿着的CHIME望远镜，将本地化数以千计的单个FRB事件具有足够的精度，明确地关联到一个主星系与每个爆发。
We demonstrate the blind interferometric detection and localization of two fast radio bursts (FRBs) with subarcminute precision on the 400 m baseline between the Canadian Hydrogen Intensity Mapping Experiment (CHIME) and the CHIME Pathfinder. In the same spirit as Very Long Baseline Interferometry (VLBI), the telescopes were synchronized to separate clocks, and the channelized voltage (herein referred to as baseband) data were saved to a disk with correlation performed offline. The simultaneous wide field of view and high sensitivity required for blind FRB searches implies a high data rate—6.5 terabits per second (Tb/s) for CHIME and 0.8 Tb s−1 for the Pathfinder. Since such high data rates cannot be continuously saved, we buffer data from both telescopes locally in memory for , and write to the disk upon receipt of a low-latency trigger from the CHIME Fast Radio Burst Instrument (CHIME/FRB). The deg2 field of view of the two telescopes allows us to use in-field calibrators to synchronize the two telescopes without needing either separate calibrator observations or an atomic timing standard. In addition to our FRB observations, we analyze bright single pulses from the pulsars B0329+54 and B0355+54 to characterize systematic localization errors. Our results demonstrate the successful implementation of key software, triggering, and calibration challenges for CHIME/FRB Outriggers: cylindrical VLBI outrigger telescopes which, along with the CHIME telescope, will localize thousands of single FRB events with sufficient precision to unambiguously associate a host galaxy with each burst.
影响因子：
64.8
作者：
Marcote, B.;Nimmo, K.;Zwaniga, A. V.
通讯作者：
Zwaniga, A. V.
影响因子：
64.8
作者：
J. Macquart;J. Prochaska;J. Prochaska;M. McQuinn;K. Bannister;S. Bhandari;C. Day;C. Day;
通讯作者：
J. Macquart;J. Prochaska;J. Prochaska;M. McQuinn;K. Bannister;S. Bhandari;C. Day;C. Day;
影响因子：
56.9
作者：
J. Prochaska;J. Macquart;M. McQuinn;S. Simha;R. Shannon;C. Day;L. Marnoch;S. Ryder;A. Deller;K. Bannister;S. Bhandari;R. Bordoloi;J. Bunton;Hyerin Cho;C. Flynn;E. Mahony;C. Phillips;H. Qiu;N. Tejos
通讯作者：
J. Prochaska;J. Macquart;M. McQuinn;S. Simha;R. Shannon;C. Day;L. Marnoch;S. Ryder;A. Deller;K. Bannister;S. Bhandari;R. Bordoloi;J. Bunton;Hyerin Cho;C. Flynn;E. Mahony;C. Phillips;H. Qiu;N. Tejos