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参见新闻贴：
http://www.equn.com/forum/viewth ... p;page=15#pid241700
PDF版下载：
http://arxiv.org/pdf/0804.1747v1
论文摘要：
http://arxiv.org/abs/0804.1747/
A search for periodic gravitational waves, from sources such as isolated rapidly-spinning neutron stars, was carried out using 510 hours of data from the fourth LIGO science run (S4). The search was for quasi-monochromatic waves in the frequency range from 50 Hz to 1500 Hz, with a linear frequency drift f-dot (measured at the solar system barycenter) in the range -f/tau < f-dot < 0.1 f/tau, where the minimum spin-down age tau was 1000 years for signals below 300 Hz and 10000 years above 300 Hz. The main computational work of the search was distributed over approximately 100000 computers volunteered by the general public. This large computing power allowed the use of a relatively long coherent integration time of 30 hours, despite the large parameter space searched. No statistically significant signals were found. The sensitivity of the search is estimated, along with the fraction of parameter space that was vetoed because of contamination by instrumental artifacts. In the 100 Hz to 200 Hz band, more than 90% of sources with dimensionless gravitational wave strain amplitude greater than 1e-23 would have been detected.
目前（S4阶段）还没有发现任何重要的目标，主要还是对研究的过程和方法进行了说明，并对本阶段能达到的灵敏度进行了评估。 |
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发表于 2008-4-11 19:31:52
发表于 2008-4-13 16:47:41
发表于 2008-4-14 22:01:28
