Search for Transient Gravitational-wave Signals Associated with Magnetar Bursts during Advanced LIGO's Second Observing Run
Source
Astrophysical Journal
ISSN
0004637X
Date Issued
2019-04-01
Author(s)
Abbott, B. P.
Abbott, R.
Abbott, T. D.
Abraham, S.
Acernese, F.
Ackley, K.
Adams, C.
Adhikari, R. X.
Adya, V. B.
Affeldt, C.
Agathos, M.
Agatsuma, K.
Aggarwal, N.
Aguiar, O. D.
Aiello, L.
Ain, A.
Ajith, P.
Allen, G.
Allocca, A.
Aloy, M. A.
Altin, P. A.
Amato, A.
Ananyeva, A.
Anderson, S. B.
Anderson, W. G.
Angelova, S. V.
Antier, S.
Appert, S.
Arai, K.
Araya, M. C.
Areeda, J. S.
Arène, M.
Arnaud, N.
Ascenzi, S.
Ashton, G.
Aston, S. M.
Astone, P.
Aubin, F.
Aufmuth, P.
Aultoneal, K.
Austin, C.
Avendano, V.
Avila-Alvarez, A.
Babak, S.
Bacon, P.
Badaracco, F.
Bader, M. K.M.
Bae, S.
Baker, P. T.
Baldaccini, F.
Ballardin, G.
Ballmer, S. W.
Banagiri, S.
Barayoga, J. C.
Barclay, S. E.
Barish, B. C.
Barker, D.
Barkett, K.
Barnum, S.
Barone, F.
Barr, B.
Barsotti, L.
Barsuglia, M.
Barta, D.
Bartlett, J.
Bartos, I.
Bassiri, R.
Basti, A.
Bawaj, M.
Bayley, J. C.
Bazzan, M.
Bécsy, B.
Bejger, M.
Belahcene, I.
Bell, A. S.
Beniwal, D.
Berger, B. K.
Bergmann, G.
Bernuzzi, S.
Bero, J. J.
Berry, C. P.L.
Bersanetti, D.
Bertolini, A.
Betzwieser, J.
Bhandare, R.
Bidler, J.
Bilenko, I. A.
Bilgili, S. A.
Billingsley, G.
Birch, J.
Birney, R.
Birnholtz, O.
Biscans, S.
Biscoveanu, S.
Bisht, A.
Bitossi, M.
Bizouard, M. A.
Blackburn, J. K.
Blair, C. D.
Blair, D. G.
Abstract
We present the results of a search for short- and intermediate-duration gravitational-wave signals from four magnetar bursts in Advanced LIGO's second observing run. We find no evidence of a signal and set upper bounds on the root sum squared of the total dimensionless strain (h <inf>rss</inf>) from incoming intermediate-duration gravitational waves ranging from 1.1 ×10<sup>-22</sup> at 150 Hz to 4.4 ×10<sup>-22</sup> at 1550 Hz at 50% detection efficiency. From the known distance to the magnetar SGR 1806-20 (8.7 kpc), we can place upper bounds on the isotropic gravitational-wave energy of 3.4 ×10<sup>44</sup> erg at 150 Hz assuming optimal orientation. This represents an improvement of about a factor of 10 in strain sensitivity from the previous search for such signals, conducted during initial LIGO's sixth science run. The short-duration search yielded upper limits of 2.1 ×10<sup>44</sup> erg for short white noise bursts, and 2.3 ×10<sup>47</sup> erg for 100 ms long ringdowns at 1500 Hz, both at 50% detection efficiency.
Subjects
gravitational waves | stars: magnetars