Directed search for gravitational waves from Scorpius X-1 with initial LIGO data

Aasi, J.; Abbott, B.P.; Abbott, R.; Iyer, B.R.; LIGO Scientific Collaboration and Virgo Collaboration; +250 Co authors

Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/6272

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DC Field	Value	Language
dc.contributor.author	Aasi, J.	-
dc.contributor.author	Abbott, B.P.	-
dc.contributor.author	Abbott, R.	-
dc.contributor.author	Iyer, B.R.	-
dc.contributor.author	LIGO Scientific Collaboration and Virgo Collaboration	-
dc.contributor.author	+250 Co authors	-
dc.date.accessioned	2015-08-07T06:07:36Z	-
dc.date.available	2015-08-07T06:07:36Z	-
dc.date.issued	2015-03-15	-
dc.identifier.citation	Physical Review D, 2015, Vol.91, p 062008	en
dc.identifier.issn	1550-7998	-
dc.identifier.issn	1550-2368(Online)	-
dc.identifier.uri	http://hdl.handle.net/2289/6272	-
dc.description	Open Access	en
dc.description.abstract	We present results of a search for continuously emitted gravitational radiation, directed at the brightest low-mass x-ray binary, Scorpius X-1. Our semicoherent analysis covers 10 days of LIGO S5 data ranging from 50–550 Hz, and performs an incoherent sum of coherent F-statistic power distributed amongst frequency-modulated orbital sidebands. All candidates not removed at the veto stage were found to be consistent with noise at a 1% false alarm rate. We present Bayesian 95% confidence upper limits on gravitational-wave strain amplitude using two different prior distributions: a standard one, with no a priori assumptions about the orientation of Scorpius X-1; and an angle-restricted one, using a prior derived from electromagnetic observations. Median strain upper limits of 1.3×10−24 and 8×10−25 are reported at 150 Hz for the standard and angle-restricted searches respectively. This proof-of-principle analysis was limited to a short observation time by unknown effects of accretion on the intrinsic spin frequency of the neutron star, but improves upon previous upper limits by factors of ∼1.4 for the standard, and 2.3 for the angle-restricted search at the sensitive region of the detector.	en
dc.language.iso	en	en
dc.publisher	American Physical Society	en
dc.relation.uri	http://arxiv.org/abs/1412.0605	en
dc.relation.uri	http://dx.doi.org/10.1103/PhysRevD.91.062008	en
dc.relation.uri	http://adsabs.harvard.edu/abs/2015PhRvD..91f2008A	en
dc.rights	2015 American Physical Society	en
dc.title	Directed search for gravitational waves from Scorpius X-1 with initial LIGO data	en
dc.type	Article	en
Appears in Collections:	Research Papers (TP)

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