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|Title:||Search for transient gravitational-wave signals associated with magnetar bursts during Advanced LIGO's second observing run|
|Citation:||The Astrophysical Journal: an international review of astronomy and astronomical physics, 2019; 874(2):163-1-163-14|
|Publisher:||American Astronomical Society; IOP Publishing|
|B.P. Abbott … D. Beniwal … D.D. Brown … H. Cao … A.A. Ciobanu … M.R. Ganija … C. Ingram … W. Kim … E.J. King … J. Munch … S. Ng … D.J. Ottaway … P.J. Veitch … et al.|
|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 rss) from incoming intermediate-duration gravitational waves ranging from 1.1 × 10⁻²² at 150 Hz to 4.4 × 10⁻²² 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 × 10⁴⁴ 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 × 10⁴⁴ erg for short white noise bursts, and 2.3 × 10⁴⁷ erg for 100 ms long ringdowns at 1500 Hz, both at 50% detection efficiency.|
|Keywords:||Gravitational waves; stars: magnetars|
|Rights:||© 2019. The American Astronomical Society. All rights reserved.|
|Appears in Collections:||Aurora harvest 8|
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