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无线电闪光的位置。这些快速射电暴（FRB）是天空中见过的最明亮的源之一，但它们的起源仍然是一个谜。新望远镜将通过与半个大陆之外的现有CHIME望远镜合作，对源位置进行三角测量。目前，大多数FRB的位置是如此不精确，以至于天文学家甚至不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，并将进一步将源定位到该星系内的特定区域。FRB之所以有趣，是因为产生闪光的极端物理学。 此外，探测到的爆发无线电波已经通过电离的宇宙结构传播了数十亿年。每一次爆发都携带着几个不同的可测量信号，这些信号在过境过程中留下了印记，为研究宇宙提供了独特的新工具。 CHIME Outrigger计划将增加美国在这一令人兴奋的新领域的参与，并培养下一代年轻科学家使用这种新型仪器。Outrigger望远镜将允许使用甚长基线干涉测量（VLBI）技术，以实现基线方向的毫角秒角分辨率。 我们将开发的望远镜将由位于绿色银行（WV）天文台的一个长60 m、宽20 m的圆柱体组成。 焦线将配备128个双极化四叶草天线，覆盖400-800 MHz频段。 使用该阵列执行非目标VLBI需要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，我们将部署基于存储器的触发读出环形缓冲区。这项开发计划将使更多的外伸支架能够在以后建造，从而使无线电爆发的定位更加精确，并将为未来建造更大的低成本，高通量望远镜铺平道路，以进行更先进的瞬态搜索和强度测绘工作。该计划将在美国最重要的射电天文台之一建立数字驱动的过境望远镜的专业知识。支腿还将作为一个独立的望远镜，作为一个外展和教育平台，支持该项目的更广泛的影响方面。该项目是由MPS/AST，建立计划，以刺激竞争力的研究（EPSCoR），和内审办/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。

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
• 期刊: The Astronomical Journal
• 作者: Cassanelli, T.;Leung, Calvin;Rahman, M.;Vanderlinde, K.;Mena-Parra, J.;Cary, S.;Masui, Kiyoshi W.;Luo, Jing;Lin, H.-H.;Bij, A.
• 通讯作者: Bij, A.

Sub-second periodicity in a fast radio burst

• DOI: 10.1038/s41586-022-04841-8
• 发表时间: 2021-07
• 期刊: Nature
• 影响因子: 64.8
• 作者: B. Andersen;K. Bandura;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-Hsien Lin;K. Masui;R. Mckinven;J. Mena-Parra;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-Ravandi;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. Vanderlinde;D. Wiebe;D. Wulf;A. Zwaniga;D. Michilli

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

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

A Clock Stabilization System for CHIME/FRB Outriggers

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

CHIME/FRB Discovery of 25 Repeating Fast Radio Burst Sources

• DOI: 10.3847/1538-4357/acc6c1
• 发表时间: 2023-01
• 期刊: The Astrophysical Journal
• 作者: T. C. C. B. C. Andersen-T.-C.-C.-B.-C.-Andersen-1388770440;K. Bandura;M. Bhardwaj;P. Boyle;C. Brar;T. Cassanelli;S. Chatterjee;P. C