Getting the Best Multi-Messenger Science out of Gravitational-Wave Data with Better Modeling of its Noise and Automation

通过更好的噪声和自动化建模，从引力波数据中获得最佳的多信使科学

• 批准号: 2309352
• 负责人: Sukanta Bose
• 金额: $ 24万
• 依托单位: Washington State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2023
• 资助国家: 美国
• 起止时间: 2023-05-15 至 2026-04-30
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2309352&HistoricalAwards=false
• 关键词: Getting; Best; Multi; Messenger; Science

This award will support the pursuit for understanding the nature of short-duration gamma-ray bursts (SGRBs) and their progenitors. An SGRB is one of the most energetic explosions in the cosmos and is triggered by the collision of two neutron stars or a neutron star and a black hole. It is accompanied by the emission of electromagnetic radiation across a wide range of wavelengths, as well as gravitational waves. While the prototypical binary neutron star collision, GW170817, expanded our understanding of such bursts in unprecedented ways, it also left certain questions unresolved. One such question is the fate of these collisions, which have been conjectured to affect the afterglows of SGRBs. This work will support multi-messenger astronomical observations of SGRB counterparts of gravitational wave (GW) signals in LIGO and Virgo to understand the nature of the remnants produced by them. The project will involve citizen scientists in this investigation via the development of Machine Learning tools for distinguishing noise artifacts in GW detectors that can masquerade as GW signals from these collisions. It will also contribute to training students at the Tri-Cities campus of the Washington State University and education and public outreach activities in neighboring areas. This campus is close to the LIGO-Hanford site and caters to a large percentage of Hispanic and Native-American populations. This project will enhance the science exploitation of gravitational-wave observations with LIGO, Virgo, and KAGRA during their fourth and fifth observation runs. It will reduce the number of false alarms among the low-latency alerts issued by those detectors. For this purpose, it will specifically target GW signals from binaries involving neutron stars. This aids astronomical observatories that follow-up these GW alerts in their quest for detecting accompanying electromagnetic and particle emissions. The project will pursue this objective by (a) contributing to the more complete accounting of sources of non-Gaussian transient noise, (b) identifying different types of non-linear couplings of noise sources, and (c) improving the significance measurement of online GW alerts by utilizing Machine Learning solutions and automated data quality inputs. It will also develop signal-based noise discriminators, or “chi-square” tests, for targeting especially those noise artifacts that are responsible for a majority of false alerts. Observations of these binaries will be used to improve our understanding of the neutron star equation of state and gravitational-wave aided measurements of the Hubble constant.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.

该奖项将支持对短时间伽玛射线暴（sgrb）及其前身性质的理解。SGRB是宇宙中能量最高的爆炸之一，由两颗中子星或一颗中子星与一个黑洞碰撞引发。它伴随着宽波长范围内的电磁辐射以及引力波的发射。虽然典型的双中子星碰撞GW170817以前所未有的方式扩展了我们对这种爆发的理解，但它也留下了一些未解决的问题。其中一个问题是这些碰撞的命运，它们被推测会影响sgrb的余辉。这项工作将支持在LIGO和Virgo中对SGRB引力波（GW）信号进行多信使天文观测，以了解它们产生的残余物的性质。该项目将让公民科学家参与这项调查，通过开发机器学习工具来区分GW探测器中的噪声伪像，这些伪像可以伪装成来自这些碰撞的GW信号。它还将为华盛顿州立大学三城校区的学生培训以及邻近地区的教育和公共宣传活动做出贡献。这个校区靠近LIGO-Hanford站点，并迎合了很大比例的西班牙裔和美洲原住民人口。该项目将加强LIGO、Virgo和KAGRA在第四次和第五次观测期间对引力波观测的科学利用。它将减少由这些检测器发出的低延迟警报中的假警报数量。为此，它将专门针对来自涉及中子星的双星的GW信号。这有助于天文台跟踪这些GW警报，以探测伴随的电磁和粒子发射。该项目将通过(a)促进对非高斯瞬态噪声源的更完整核算，(b)识别噪声源的不同类型的非线性耦合，以及(c)通过利用机器学习解决方案和自动数据质量输入改进在线GW警报的显著性测量来实现这一目标。它还将开发基于信号的噪声鉴别器，或“卡方”测试，以瞄准那些导致大多数错误警报的噪声伪像。对这些双星的观测将用于提高我们对中子星状态方程和引力波辅助哈勃常数测量的理解。该奖项反映了美国国家科学基金会的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。