期刊
PHYSICAL REVIEW D
卷 100, 期 6, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.100.063508
关键词
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资金
- King's College London
- Science and Technology Facility Council (STFC), United Kingdom [ST/P000258/1]
- STFC [ST/P000258/1] Funding Source: UKRI
We calculate the shot noise induced in the anisotropies of the astrophysical gravitational-wave background by (mite sampling of both the galaxy distribution and the compact binary coalescence event rate. This leads to a white noise term in the angular power spectrum C-l, for which we derive a simple analytical expression. Failing to account for this term (as previous analyses have done) biases any measurement of the C-l's. We find that the shot noise dominates over the true astrophysical power spectrum in any reasonable observing scenario, and that only with very long observing times and removal of a large number of foreground sources can the true power spectrum be recovered.
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