STACKED SEARCH FOR GRAVITATIONAL WAVES FROM THE 2006 SGR 1900+14 STORM

STACKED SEARCH FOR GRAVITATIONAL WAVES FROM THE 2006 SGR 1900+14 STORM
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对 2006 年 SGR 1900 14 风暴的引力波进行叠加搜索

DOI:
10.1088/0004-637x/701/2/l68
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发表时间:
2009
期刊:
The Astrophysical Journal
影响因子:
--
通讯作者:
Abbott B
Abbott B
中科院分区:
--
文献类型:
--
作者:
Abbott B

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我们提出了一个LIGO搜索与2006年3月29日SGR 1900+ 14风暴的短持续时间的引力波(GWs)的结果。使用一种新的搜索方法,“堆叠”GW数据的时间周围的个别软伽玛暴在风暴中,以提高模型的灵敏度,其中多个突发伴随着GW的排放。我们假设突发电磁发射和潜在突发GW发射之间的时间差的变化相对于GW信号持续时间是小的,并且我们将包含单独突发触发器的GW过量功率时间-频率平铺与它们对应的电磁发射时间对准。我们在搜索中使用了两个GW发射模型:通量加权模型和用于最具电磁能量爆发的平坦(未加权)模型。我们没有发现任何证据的GWs与这两种模式。模型相关GW应变,各向同性GW发射能量EGW,和γ ε EGW/EEM上限估计使用各种假设的波形。叠加方法使我们能够设置最严格的模型依赖的限制,到目前为止发表的瞬态GW应变。我们发现EGW上限估计值(在10 kpc的标称距离)在2× 1045 erg和6× 1050 erg之间,取决于波形类型。这些限制是一个数量级低于上限先前公布的这场风暴和重叠的范围内发射的电磁能量软伽马中继器(SGR)的巨型耀斑。
We present the results of a LIGO search for short-duration gravitational waves (GWs) associated with the 2006 March 29 SGR 1900+ 14 storm. A new search method is used,“stacking” the GW data around the times of individual soft-gamma bursts in the storm to enhance sensitivity for models in which multiple bursts are accompanied by GW emission. We assume that variation in the time difference between burst electromagnetic emission and potential burst GW emission is small relative to the GW signal duration, and we time-align GW excess power time–frequency tilings containing individual burst triggers to their corresponding electromagnetic emissions. We use two GW emission models in our search: a fluence-weighted model and a flat (unweighted) model for the most electromagnetically energetic bursts. We find no evidence of GWs associated with either model. Model-dependent GW strain, isotropic GW emission energy EGW, and γ≡ EGW/EEM upper limits are estimated using a variety of assumed waveforms. The stacking method allows us to set the most stringent model-dependent limits on transient GW strain published to date. We find EGW upper limit estimates (at a nominal distance of 10 kpc) of between 2× 1045 erg and 6× 1050 erg depending on the waveform type. These limits are an order of magnitude lower than upper limits published previously for this storm and overlap with the range of electromagnetic energies emitted in soft gamma repeater (SGR) giant flares.
SGR 1900 的深度射电、光学和红外观测 14
DOI: --
发表时间: 2001
期刊:
影响因子: --
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与SGR耀斑相关的未建模瞬态引力波的搜索方法
DOI: --
发表时间: 2007
期刊:
影响因子: --
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发表时间: 2005
期刊: Physical Review D
影响因子: 5
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