Title:	Searches for continuous gravitational waves from nine young supernova remnants
Authors:	Aasi, J. Abbott, B.P. Iyer, B.R. LIGO Scientific Collaboration and Virgo Collaboration +250 Co authors
Issue Date:	Nov-2015
Publisher:	IOP Sciences for The American Astronomical Society
Citation:	The Astrophysical Journal, 2015, Vol.813, p39
Abstract:	We describe directed searches for continuous gravitational waves (GWs) in data from the sixth Laser Interferometer Gravitational-wave Observatory (LIGO) science data run. The targets were nine young supernova remnants not associated with pulsars; eight of the remnants are associated with non-pulsing suspected neutron stars. One target's parameters are uncertain enough to warrant two searches, for a total of 10. Each search covered a broad band of frequencies and first and second frequency derivatives for a fixed sky direction. The searches coherently integrated data from the two LIGO interferometers over time spans from 5.3–25.3 days using the matched-filtering ${\mathcal{F}}$-statistic. We found no evidence of GW signals. We set 95% confidence upper limits as strong (low) as 4 × 10−25 on intrinsic strain, 2 × 10−7 on fiducial ellipticity, and 4 × 10−5 on r-mode amplitude. These beat the indirect limits from energy conservation and are within the range of theoretical predictions for neutron-star ellipticities and r-mode amplitudes.
Description:	Restricted Access. An open-access version is available at arXiv.org (one of the alternative locations)
URI:	http://hdl.handle.net/2289/6398
ISSN:	0004-637X 1538-4357-(Online)
Alternative Location:	http://arxiv.org/abs/1412.5942 http://dx.doi.org/10.1088/0004-637X/813/1/39 http://adsabs.harvard.edu/abs/2015ApJ...813...39A
Copyright:	2015 American Astronomical Society
Appears in Collections:	Research Papers (TP)

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