Search for Transient Gravitational-wave Signals Associated with Magnetar Bursts during Advanced LIGO's Second Observing Run
Search for Transient Gravitational-wave Signals Associated with Magnetar Bursts during Advanced LIGO's Second Observing Run
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DOI：
10.3847/1538-4357/ab0e15
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发表时间：
2019-04-01
影响因子：
4.9
通讯作者：
Zweizig, J.
中科院分区：
文献类型：
--
作者：
Abbott, B. P.;Abbott, R.;Zweizig, J.
我们提出了一个搜索的结果，短期和中期的引力波信号从四个磁星爆发在先进的LIGO的第二次观测运行。我们没有发现信号的证据，并在50%的检测效率下，从150 Hz的1.1 x 10（-22）到1550 Hz的4.4 x 10（-22）的入射中等持续时间引力波中，对总无量纲应变（h（rss））的平方根和设定了上限。根据到磁星SGR 1806-20（8.7 kpc）的已知距离，我们可以将各向同性引力波能量的上限定为3.4 x 10（44）erg，150 Hz，假设最佳方向。这代表着应变灵敏度比之前在LIGO第六次科学运行期间进行的对此类信号的搜索提高了约10倍。短持续时间搜索产生的上限为2.1 × 10（44）erg的短白色噪声突发，和2.3 × 10（47）erg的100毫秒长的振铃在1500赫兹，在50%的检测效率。
We present the results of a search for short- and intermediate-duration gravitational-wave signals from four magnetar bursts in Advanced LIGO' s second observing run. We find no evidence of a signal and set upper bounds on the root sum squared of the total dimensionless strain (h(rss)) from incoming intermediate-duration gravitational waves ranging from 1.1 x 10(-22) at 150 Hz to 4.4 x 10(-22) at 1550 Hz at 50% detection efficiency. From the known distance to the magnetar SGR 1806-20 (8.7 kpc), we can place upper bounds on the isotropic gravitational-wave energy of 3.4 x 10(44) erg at 150 Hz assuming optimal orientation. This represents an improvement of about a factor of 10 in strain sensitivity from the previous search for such signals, conducted during initial LIGO' s sixth science run. The short-duration search yielded upper limits of 2.1 x 10(44) erg for short white noise bursts, and 2.3 x 10(47) erg for 100 ms long ringdowns at 1500 Hz, both at 50% detection efficiency.