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Understanding the LIGO GW150914 event · Around

2016

Understanding the LIGO GW150914 event

Naselsky, P., Jackson, A. D., Liu, Hao

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We present a simplified method for the extraction of meaningful signals from Hanford and Livingstone 32 seconds data for the GW150914 event made publicly available by the LIGO collaboration and demonstrate its ability to reproduce the LIGO collaboration's own results quantitatively given the assumption that all narrow peaks in the power spectrum are a consequence of physically uninteresting signals and can be removed.

After the clipping of these peaks and return to the time domain, the GW150914 event is readily distinguished from broadband background noise.
This simple technique allows us to identify the GW150914 event without any assumption regarding its physical origin and with minimal assumptions regarding its shape.
We also confirm that the LIGO GW150914 event is uniquely correlated in the Hanford and Livingston detectors for 4096 second data at the level of $6-7\,\sigma$ with a temporal displacement of $\tau=6.9 \pm 0.4\,$ms.

Built on

Whelan, J. T., Sundaresan, S., Zhang, Y., & Peiris, P. 2015, Phys. Rev. D, 91, 102005
2015
Earlier work this paper cites.
Abbott, B. P., Abbott, R., Abbott, T. D., et al. 2016, Physical Review Letters, 116, 061102
2016
Earlier work this paper cites.
Abbott, B. P., Abbott, R., Abbott, T. D., et al. 2016, Physical Review Letters, 116, 241103
2016
Earlier work this paper cites.

Similar

The LIGO Scientific Collaboration, Martynov, D. V., Hall, E. D., et al. 2016, arXiv:1604.00439
Original
2016
Cited alongside, same era.
The LIGO Scientific Collaboration, & the Virgo Collaboration 2016, arXiv:1602.03843
Original
2016
Cited alongside, same era.
The LIGO data are publicly available at https://losc.ligo.org/events/GW150914/ . In this work, we use the strain time series centered at GPS 1126259462 with a 16384 Hz sampling rate and 32 and 4096 second length. An official tutorial about how to use the data is available at https://losc.ligo.org/s/events/GW150914/GW150914_tutorial.html
2016
Cited alongside, same era.

Then

https://losc.ligo.org/events/GW151226/
2016
Closest in time.
LIGO Scientific Collaboration, “LIGO Open Science Center release of GW150914”, 2016, DOI 10.7935/K5MW2F23
2016
Closest in time.

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