MRI: Development of a CHIME Outrigger Telescope

MRI：CHIME 支腿望远镜的开发

• 批准号: 2018490
• 负责人: Kevin Bandura
• 金额: $ 172.25万
• 依托单位: West Virginia University Research Corporation
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2020
• 资助国家: 美国
• 起止时间: 2020-10-01 至 2024-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2018490&HistoricalAwards=false
• 关键词: MRI; Development; CHIME; Outrigger; Telescope

The Canadian Hydrogen Intensity Mapping Experiment (CHIME) Outrigger Telescope will be used to pinpoint the location of thousands of bright radio flashes coming from far off galaxies. These Fast Radio Bursts (FRBs) are among the brightest sources ever seen on the sky, but their origin remains a mystery. The new telescope will triangulate source positions by working with the existing CHIME telescope, half a continent away. Currently, most FRB positions are so imprecise that astronomers don’t even know which galaxy they came from. The Outrigger will solve that problem, determining the particular galaxy, and will go further, localizing the source to a specific region within that galaxy. FRBs are interesting because of the extreme physics that creates the flash. In addition, the burst radio waves detected have travelled for billions of years through ionized cosmic structure. Each burst carries several distinct measurable signals imprinted during transit, providing unique new tools to study the cosmos. The CHIME Outrigger program will increase US participation in this exciting new area, and train the next generation of young scientists in this novel type of instrumentation.The Outrigger telescope will allow use of very long baseline interferometry (VLBI) techniques to achieve milli-arcsecond angular resolution in the baseline direction. The telescope we will develop will consist of a single 60 m long by 20 m wide cylinder located at the Green Bank (WV) Observatory. The focal line will be outfitted with 128 dual-polarized quad-clover antennas covering the 400-800 MHz band. Performing untargeted VLBI with this array requires a data recorder capable of storing and processing terabytes of data from all 256 radio-frequency channels, for which we will deploy a memory-based ring buffer with triggered readout. This development program will enable additional outriggers to be built later, allowing even sharper localization of radio bursts, and will pave the way for future construction of larger low-cost, high-throughput telescopes for more advanced transient searches and Intensity Mapping efforts. The program will build expertise in digitally-driven transit telescopes at one of the premier radio observatories in the US. The Outrigger also will serve as a standalone telescope used as an outreach and education platform supporting the broader impacts aspects of this project.This project is jointly funded by MPS/AST, the Established Program to Stimulate Competitive Research (EPSCoR), and the OIA/MRI Program.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

加拿大氢强度测绘实验（CHIME）支腿望远镜将用于确定来自遥远星系的数千个明亮射电闪光的位置，这些快速射电爆发（FRB）是天空中见过的最明亮的光源之一，但它们的亮度却很高。新望远镜将通过与半个大陆之外的现有 CHIME 望远镜合作来对源位置进行三角测量，目前大多数 FRB 位置都非常不精确，以至于天文学家甚至无法测量。知道它们来自哪个星系，支腿将解决这个问题，确定特定的星系，并进一步将源定位到该星系内的特定区域，因为产生闪光的极端物理现象很有趣。 ，探测到的爆发无线电波已经通过电离宇宙结构传播了数十亿年，每次爆发都携带着在传输过程中留下的几个不同的可测量信号，为研究宇宙提供了独特的新工具，CHIME Outrigger 计划将增加美国对此的参与。令人兴奋的新领域，并培训下一代年轻科学家使用这种新型仪器。支腿望远镜将允许使用超长基线干涉测量（VLBI）技术，以在基线方向实现毫角秒角分辨率。开发将由位于 Green Bank (WV) 天文台的一个 60 m 长 x 20 m 宽的圆柱体组成，焦线将配备 128 个双偏振四叶草。使用该阵列执行覆盖 400-800 MHz 频段的非目标 VLBI 需要一个能够存储和处理来自所有 256 个射频通道的 TB 数据的数据记录器，为此我们将部署一个具有触发读出功能的基于内存的环形缓冲区。该开发计划将使以后能够建造更多的支腿，从而更精确地定位射电爆发，并为未来建造更大的低成本、高通量望远镜铺平道路该计划将在美国首屈一指的射电天文台之一建立数字驱动的凌日望远镜方面的专业知识，并将作为一个独立的望远镜，用作支持的外展和教育平台。该项目由 MPS/AST、刺激竞争性研究既定计划 (EPSCoR) 和 OIA/MRI 计划共同资助。该奖项反映了 NSF 的法定使命，并通过使用基金会的智力价值和更广泛的影响审查标准进行评估，被认为值得支持。

项目成果

Localizing FRBs through VLBI with the Algonquin Radio Observatory 10 m Telescope

使用阿冈昆射电天文台 10 m 望远镜通过 VLBI 定位 FRB

• DOI: 10.3847/1538-3881/ac3d2f
• 发表时间: 2022-01
• 期刊: The Astronomical Journal
• 作者: Cassanelli, T.;Leung, Calvin;Rahman, M.;Vanderlinde, K.;Mena;Cary, S.;Masui, Kiyoshi W.;Luo, Jing;Lin, H.;Bij, A.;et al
• 通讯作者: et al

Constraining primordial black holes using fast radio burst gravitational-lens interferometry with CHIME/FRB

使用快速射电爆发引力透镜干涉测量法和 CHIME/FRB 约束原初黑洞

• DOI: 10.1103/physrevd.106.043017
• 发表时间: 2022-04-12
• 期刊: Physical Review D
• 影响因子: 5
• 作者: C. Leung;Zarif Kader;K. Masui;M. Dobbs;D. Michilli;J. Mena;R. Mckinven;C. Ng;K. B;ura;ura;M. Bhardwaj;C. Brar;T. Cassanelli;P. Chawla;F. Dong;D. Good;V. Kaspi;A. Lanman;Hsiu;B. W. Meyers;A. Pearlman;U. Pen;E. Petroff;Z. Pleunis;M. Rafiei;i;i;Mubdi Rahman;P. Sanghavi;P. Scholz;K. Shin;S. Siegel;Kendrick M. Smith;I. Stairs;S. Tendulkar;K. V;erlinde;erlinde
• 通讯作者: erlinde

High-time resolution search for compact objects using fast radio burst gravitational lens interferometry with CHIME/FRB

使用快速射电爆发引力透镜干涉测量法和 CHIME/FRB 进行高时间分辨率搜索致密物体

• DOI: 10.1103/physrevd.106.043016
• 发表时间: 2022-04-12
• 期刊: Physical Review D
• 影响因子: 5
• 作者: Zarif Kader;C. Leung;M. Dobbs;K. Masui;D. Michilli;J. Mena;R. Mckinven;C. Ng;K. B;ura;ura;M. Bhardwaj;C. Brar;T. Cassanelli;P. Chawla;F. Dong;D. Good;V. Kaspi;A. Lanman;Hsiu;B. W. Meyers;A. Pearlman;U. Pen;E. Petroff;Z. Pleunis;M. Rafiei;i;i;Mubdi Rahman;P. Sanghavi;P. Scholz;K. Shin;S. Siegel;Kendrick M. Smith;I. Stairs;S. Tendulkar;K. V;erlinde;erlinde;D. Wulf
• 通讯作者: D. Wulf

Sub-second periodicity in a fast radio burst

快速无线电突发中的亚秒级周期性

• DOI: 10.1038/s41586-022-04841-8
• 发表时间: 2021-07-18
• 期刊: Nature
• 影响因子: 64.8
• 作者: B. Andersen;K. B;ura;ura;M. Bhardwaj;P. Boyle;C. Brar;D. Breitman;T. Cassanelli;S. Chatterjee;P. Chawla;J. Cliche;D. Cubranic;A. Curtin;M. Deng;M. Dobbs;F. Dong;E. Fonseca;B. Gaensler;U. Giri;D. Good;A. Hill;A. Josephy;J. Kaczmarek;Zarif Kader;Joseph W. Kania;V. Kaspi;C. Leung;D. Li;Hsiu;K. Masui;R. Mckinven;J. Mena;M. Merryfield;B. W. Meyers;D. Michilli;A. Naidu;L. Newburgh;C. Ng;A. Ordog;C. Patel;A. Pearlman;U. Pen;E. Petroff;Z. Pleunis;M. Rafiei;i;i;Mubdi Rahman;S. Ransom;A. Renard;P. Sanghavi;P. Scholz;J. Shaw;K. Shin;S. Siegel;Saurabh Singh;Kendrick M. Smith;I. Stairs;C. M. Tan;S. Tendulkar;K. V;erlinde;erlinde;D. Wiebe;D. Wulf;A. Zwaniga;D. Michilli
• 通讯作者: D. Michilli

A Clock Stabilization System for CHIME/FRB Outriggers

CHIME/FRB支腿时钟稳定系统

• DOI: 10.3847/1538-3881/ac397a
• 发表时间: 2021-10-01
• 期刊: The Astronomical Journal
• 作者: J. Mena;C. Leung;S. Cary;K. Masui;J. Kaczmarek;M. Amiri;K. B;ura;ura;P. Boyle;T. Cassanelli;J. Cliche;M. Dobbs;V. Kaspi;T. L;ecker;ecker;A. Lanman;J. Sievers
• 通讯作者: J. Sievers