Collaborative Research: RUI: Commensal All-sky Imaging of Low-Frequency Transients with EPIC

合作研究：RUI：使用 EPIC 进行低频瞬变的共生全天空成像

• 批准号: 2108348
• 负责人: Adam Beardsley
• 金额: $ 7.45万
• 依托单位: Winona State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2021
• 资助国家: 美国
• 起止时间: 2021-09-01 至 2024-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2108348&HistoricalAwards=false
• 关键词: Collaborative; Research; RUI; Commensal; sky

Radio telescopes allow astronomers to see energetic events in the universe. New and planned radio telescopes use thousands of antennas. The antenna signals must be combined digitally in supercomputers to make images of the sky. Reducing these computations will reduce the cost of future telescopes. The investigators have developed an algorithm that is faster and will implement it on the Long Wavelength Array in New Mexico. Using the images, the investigators will search for fast radio bursts, a recently discovered phenomenon. This may help identify the type of objects that make these mysterious bursts. The team will also study other astronomical objects. They will extend the Research Experiences for Non-Traditional Undergraduates (RENTU) program. Financial or family obligations can prevent students from participating in research. This program makes research more accessible for first-generation and under-represented student groups as well as veterans. This project addresses the goals of the Windows on the Universe Big Idea.Modern low-frequency radio interferometers enable views of cosmic dawn and the time-variable sky. Driven by the need for wide fields, high sensitivity, and excellent imaging performance, these telescopes include hundreds or thousands of individual antennas. Processing so many signals is computationally expensive, particularly for science objectives that require all-sky imaging and high-temporal resolution. This project seeks to advance a real-time, all-sky radio interferometer imaging architecture that reduces the standard computational scaling. The capabilities of an existing system currently implemented on the Long Wavelength Array station in Sevilleta, New Mexico will be expanded by improving efficiency and operating bandwidth, enabling response to external events and triggers, developing a transient detection module, coordinating commensal observing with other facilities, and monitoring sources of interest. The imager will be used for fast-transient studies at low frequencies, including targets such as pulsars, prompt radio counterparts to gravitational wave events, interplanetary scintillation, and searches for fast radio bursts. The investigators will also extend the Research Experiences for Non-Traditional Undergraduates (RENTU) program at Arizona State University to include the University of New Mexico and Winona State University. This program serves local students for whom financial or family obligations prevent from participating in existing research programs away from their home institutions.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.

射电望远镜使天文学家能够看到宇宙中的高能事件。 新的和计划中的射电望远镜使用数千个天线。 天线信号必须在超级计算机中进行数字组合才能形成天空图像。 减少这些计算将降低未来望远镜的成本。 研究人员开发了一种更快的算法，并将在新墨西哥州的长波长阵列上实施。 研究人员将利用这些图像来寻找快速射电爆发，这是最近发现的一种现象。 这可能有助于识别产生这些神秘爆发的物体类型。 该团队还将研究其他天文物体。 他们将扩展非传统本科生研究经验（RENTU）计划。 经济或家庭义务可能会阻止学生参与研究。 该计划使第一代和代表性不足的学生群体以及退伍军人更容易参与研究。 该项目解决了“宇宙之窗”大构想的目标。现代低频射电干涉仪可以看到宇宙黎明和随时间变化的天空。 由于对宽视场、高灵敏度和出色成像性能的需求，这些望远镜包括数百或数千个单独的天线。 处理如此多的信号在计算上是昂贵的，特别是对于需要全天空成像和高时间分辨率的科学目标。 该项目旨在推进实时、全天射电干涉仪成像架构，以减少标准计算规模。目前在新墨西哥州塞维利亚塔长波长阵列站上实施的现有系统的功能将通过提高效率和操作带宽、能够响应外部事件和触发器、开发瞬态检测模块、协调与其他设施的共生观测以及监视感兴趣的源来扩展。 该成像仪将用于低频快速瞬态研究，包括脉冲星等目标、引力波事件的即时射电对应物、行星际闪烁以及快速射电爆发的搜索。 研究人员还将把亚利桑那州立大学的非传统本科生研究经验（RENTU）项目扩展到新墨西哥大学和威诺纳州立大学。 该项目为因经济或家庭原因而无法参与远离家乡机构的现有研究项目的当地学生提供服务。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

Optimization and commissioning of the EPIC commensal radio transient imager for the long wavelength array

长波长阵列EPIC共生无线电瞬态成像仪的优化和调试

• DOI: 10.1093/mnras/stad263
• 发表时间: 2023
• 期刊: Monthly Notices of the Royal Astronomical Society
• 影响因子: 4.8
• 作者: Krishnan, Harihanan;Beardsley, Adam P.;Bowman, Judd D.;Dowell, Jayce;Kolopanis, Matthew;Taylor, Greg;Thyagarajan, Nithyanandan
• 通讯作者: Thyagarajan, Nithyanandan