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- W4385327657 abstract "We present the results of a Bayesian search for gravitational wave (GW) memory in the NANOGrav 12.5-yr data set. We find no convincing evidence for any gravitational wave memory signals in this data set (Bayes factor = 2.8). As such, we go on to place upper limits on the strain amplitude of GW memory events as a function of sky location and event epoch. These upper limits are computed using a signal model that assumes the existence of a common, spatially uncorrelated red noise in addition to a GW memory signal. The median strain upper limit as a function of sky position is approximately $3.3 times 10^{-14}$. We also find that there are some differences in the upper limits as a function of sky position centered around PSR J0613$-$0200. This suggests that this pulsar has some excess noise which can be confounded with GW memory. Finally, the upper limits as a function of burst epoch continue to improve at later epochs. This improvement is attributable to the continued growth of the pulsar timing array." @default.
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- W4385327657 date "2023-07-25" @default.
- W4385327657 modified "2023-10-17" @default.
- W4385327657 title "The NANOGrav 12.5-year Data Set: Search for Gravitational Wave Memory" @default.
- W4385327657 doi "https://doi.org/10.48550/arxiv.2307.13797" @default.
- W4385327657 hasPublicationYear "2023" @default.
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