Toward Calibration of the Global Network of Gravitational Wave Detectors with Sub-Percent Absolute and Relative Accuracy
Toward Calibration of the Global Network of Gravitational Wave Detectors with Sub-Percent Absolute and Relative Accuracy
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DOI：
10.3390/galaxies10020042
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发表时间：
2022-03
期刊：
影响因子：
2.5
通讯作者：
S. Karki;D. Bhattacharjee;R. Savage
中科院分区：
文献类型：
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作者：
S. Karki;D. Bhattacharjee;R. Savage
在过去的几年里，LIGO和Virgo天文台对引力波信号的探测将我们带入了引力波天文学时代，将我们的重点从探测转移到了源参数估计上。这对校准提出了严格的要求，以便最大限度地从这些探测到的信号中提取天体物理信息。电流探测器依靠来自辅助激光器的光子辐射压力来实现所需的校准精度。这些光子校准器在过去几年中取得了重大改进，实现了基准位移的低于百分比的精度。这种精度的实现直接依赖于激光功率的校准。在计划于2022年底开始的下一次观测活动中，正在实施一项新计划，以提高全球网络中所有GW探测器的激光功率校准精度。预计这将显著提高整个网络的绝对和相对校准精度。
The detection of gravitational-wave signals by the LIGO and Virgo observatories during the past few years has ushered us into the era of gravitational-wave astronomy, shifting our focus from detection to source parameter estimation. This has imposed stringent requirements on calibration in order to maximize the astrophysical information extracted from these detected signals. Current detectors rely on photon radiation pressure from auxiliary lasers to achieve required calibration accuracy. These photon calibrators have made significant improvements over the last few years, realizing fiducials displacements with sub-percent accuracy. This achieved accuracy is directly dependent on the laser power calibration. For the next observing campaign, scheduled to begin at the end of 2022, a new scheme is being implemented to achieve improved laser power calibration accuracy for all of the GW detectors in the global network. It is expected to significantly improve absolute and relative calibration accuracy for the entire network.