SEARCHES for CONTINUOUS GRAVITATIONAL WAVES from NINE YOUNG SUPERNOVA REMNANTS
Source
Astrophysical Journal
ISSN
0004637X
Date Issued
2015-11-01
Author(s)
Aasi, J.
Abbott, B. P.
Abbott, R.
Abbott, T.
Abernathy, M. R.
Acernese, F.
Ackley, K.
Adams, C.
Adams, T.
Addesso, P.
Adhikari, R. X.
Adya, V.
Affeldt, C.
Agathos, M.
Agatsuma, K.
Aggarwal, N.
Aguiar, O. D.
Ain, A.
Ajith, P.
Alemic, A.
Allen, B.
Allocca, A.
Amariutei, D.
Anderson, S. B.
Anderson, W. G.
Arai, K.
Araya, M. C.
Arceneaux, C.
Areeda, J. S.
Ast, S.
Aston, S. M.
Astone, P.
Aufmuth, P.
Aulbert, C.
Aylott, B. E.
Babak, S.
Baker, P. T.
Baldaccini, F.
Ballardin, G.
Ballmer, S. W.
Barayoga, J. C.
Barbet, M.
Barclay, S.
Barish, B. C.
Barker, D.
Barone, F.
Barr, B.
Barsotti, L.
Barsuglia, M.
Bartlett, J.
Barton, M. A.
Bartos, I.
Bassiri, R.
Basti, A.
Batch, J. C.
Bauer, Th S.
Baune, C.
Bavigadda, V.
Behnke, B.
Bejger, M.
Belczynski, C.
Bell, A. S.
Bell, C.
Benacquista, M.
Bergman, J.
Bergmann, G.
Berry, C. P.L.
Bersanetti, D.
Bertolini, A.
Betzwieser, J.
Bhagwat, S.
Bhandare, R.
Bilenko, I. A.
Billingsley, G.
Birch, J.
Biscans, S.
Bitossi, M.
Biwer, C.
Bizouard, M. A.
Blackburn, J. K.
Blackburn, L.
Blair, C. D.
Blair, D.
Bloemen, S.
Bock, O.
Bodiya, T. P.
Boer, M.
Bogaert, G.
Bojtos, P.
Bond, C.
Bondu, F.
Bonelli, L.
Bonnand, R.
Bork, R.
Born, M.
Boschi, V.
Bose, Sukanta
Bradaschia, C.
Brady, P. R.
Braginsky, V. B.
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 -statistic. We found no evidence of GW signals. We set 95% confidence upper limits as strong (low) as 4 × 10<sup>-25</sup> on intrinsic strain, 2 × 10<sup>-7</sup> on fiducial ellipticity, and 4 × 10<sup>-5</sup> 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.
Subjects
gravitational waves | ISM: supernova remnants | stars: neutron