标题： LIGO-印度：对其范围、相关性、进展和未来的十年评估 显示英文标题

标题： LIGO-India: A Decadal Assessment on Its Scope, Relevance, Progress, and Future

摘要： LIGO-India项目于2011年作为一个印度国家级大型科学项目被提出并启动，目的是与LIGO-美国合作，在印度建造和运行先进的LIGO（aLIGO）引力波（GW）探测器。自那时起，程序性手续和选址工作取得进展，并于2016年获得了印度国家级项目的临时批准，紧随首次直接通过aLIGO探测器检测到引力波之后。 随着日本的KAGRA引力波探测器正在调整以成为引力波探测网络的一部分，现在正是评估LIGO-India项目进展，并评估其对于引力波科学和天文学的相关性和范围的时候。 从全球引力波探测器灵敏度发展的背景下重新评估了该项目实施中的各种关键因素，如人力、管理、资金、时间表等。在我看来，即使只达到设计灵敏度的一小部分，该项目也将在2032年后超过十年才能完成探测器的建设。我估计，项目的实施预算将翻倍以上，达到约350亿卢比（>43亿美元）。从我个人的观点来看，讨论了项目可能面临的不利后果。然而，如果有一个紧急且正确的领导计划，由于LIGO-India探测器的设计与运行中的aLIGO探测器相似，它可以在2032年后的几年内成为多信使天文学的重要成功项目。 为了实现这一目标，至关重要的是，LIGO-India探测器需要在O5升级后的A#版本后重新规划并启动，类似于预期的LIGO-美国探测器。 显示英文摘要

摘要： The LIGO-India project to build and operate an advanced LIGO (aLIGO) gravitational wave (GW) detector in India in collaboration with LIGO-USA was considered and initiated as an Indian national megascience project in 2011. Procedural formalities and site selection efforts progressed since then and the provisional approval for the Indian national project was obtained in 2016, immediately following the first direct detection of gravitational waves with the aLIGO detectors. With KAGRA GW detector in Japan being tuned to be part of the GW detector network, it is now the occasion to assess the progress of LIGO-India project, and evaluate its relevance and scope for gravitational wave science and astronomy. Various key factors like human-power, management, funding, schedule etc., in the implementation of the project are reassessed in the backdrop of the evolution of the global GW detector sensitivity. In what I consider as a realistic estimate, it will take more than a decade, beyond 2032, to commission the detector even with a fraction of the projected design sensitivity. I estimate that the budget for implementation will be more than doubled, to about Rs. 35 billion (> $430 million). The detrimental consequences for the project are discussed, from my personal point of view. However, a revamped action plan with urgency and the right leadership can make LIGO-India a late but significant success for multi-messenger astronomy for several years after 2032, because of its design similitude to the operational aLIGO detectors. For achieving this, it is imperative that the LIGO-India detector is replanned and launched in the post-O5 upgraded A# version, similar to the projected LIGO-USA detectors.