Einstein@Home S4 阶段的研究结果已正式出版！

参见新闻贴：
[url]http://www.equn.com/forum/viewthread.php?tid=4131&page=15#pid241700[/url]

PDF版下载：
[url]http://arxiv.org/pdf/0804.1747v1[/url]

论文摘要：
[url]http://arxiv.org/abs/0804.1747/[/url]

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. [b]No statistically significant signals were found[/b]. 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。

最后致谢的第一段

The authors thank the tens of thousands of volunteers
who have supported the Einstein@Home project by do-
nating their computer time and expertise for this anal-
ysis. Without their contributions, this work would not
have been possible.

[em05]

keep crunching~~[em02]

好像刚满1年了，如果我没记错，应该就是去年这个时候收到 S4 的任务。

差不多吧，s4的结果老早就应该出来了，但因为还需要经过多方审阅，所以拖到现在才发表，态度很认真~~[em02]

老外确实认真，不搞个几十次不罢休啊…… 要是晚上我能几十次就好了，呵呵[em02] [em03] [em04]

[em03] [em03] [em03]

[quote]原帖由 [i]Youth[/i] 于 2008-4-14 21:53 发表 [url=http://www.equn.com/forum/redirect.php?goto=findpost&pid=242040&ptid=18065][img]http://www.equn.com/forum/images/common/back.gif[/img][/url]
[em03] [em03] [em03] [/quote]
[em03] [em03] [em03]

[quote]原帖由 [i]Julian_Yuen[/i] 于 2008-4-14 22:01 发表 [url=http://www.equn.com/forum/redirect.php?goto=findpost&pid=242046&ptid=18065][img]http://www.equn.com/forum/images/common/back.gif[/img][/url]

[em03] [em03] [em03] [/quote]



你们在[em03] 什么呢...?

回复 #8 昂宿星团人 的帖子

[em03] [em03] [em03]

看来你已经准备好入选第二届论坛噢嘶咔了。。

嗯，不错不错～
下载来看看～练练专业英语～

回复 #9 BiscuiT 的帖子

想了想，还是不发表任何评论好了........[em17]

官方论坛上的一个相关讨论贴：

[url]http://einstein.phys.uwm.edu/forum_thread.php?id=6618[/url]

这个论文的初稿去年5月就出来了。。。

估计不对有针对s4的类似于官方网站首页上那个[url=http://einstein.phys.uwm.edu/FinalS3Results]s3的结果报告[/url]的东东了。

If someone inside the project wants to prepare an equation-free presentation along the lines of the S3 final-result web pages, I would encourage it. But right now, most of us want to focus on finishing the analysis of the data from S5. This is more sensitive data than S4, and we have developed better and more sensitive analysis tools.

目前主要在忙于分析s5的数据。

现在才来参与引力波探测

.
研究结果出来了，是不是就是说以后就要停止这个项目了？ [em16]

是阶段结果，参12#

.
哦……那就好。我还以为我刚参加进来，项目就完毕了呢 [em03]

这个项目至少也要运行到2010年后了吧，虽说科研不能急功近利，但心里还是希望能尽早看到预期的结果[em02]

引力波确实存在的话，倒可以用来发电。

[quote]原帖由 [i]windin[/i] 于 2008-6-1 15:45 发表 [url=http://www.equn.com/forum/redirect.php?goto=findpost&pid=245850&ptid=18065][img]http://www.equn.com/forum/images/common/back.gif[/img][/url]
引力波确实存在的话，倒可以用来发电。 [/quote]

[em07] [em07]

[quote]原帖由 [i]windin[/i] 于 2008-6-1 15:45 发表 [url=http://www.equn.com/forum/redirect.php?goto=findpost&pid=245850&ptid=18065][img]http://www.equn.com/forum/images/common/back.gif[/img][/url]
引力波确实存在的话，倒可以用来发电。 [/quote]

哦？此话怎讲？

Reply #9 BiscuiT's post

呃...其实今天才认真看了#5的内容...
批判接受,批判接受...[em08]

回复 #21 昂宿星团人 的帖子

对隐晦的领悟能力不足~~~

傻傻的纯洁也是一种萌要素

不懂．．．．有如天书