@article{562fa132c92746f69cfe50030fb431c5,
title = "Search for gravitational waves from Scorpius X-1 in the second Advanced LIGO observing run with an improved hidden Markov model",
abstract = "We present results from a semicoherent search for continuous gravitational waves from the low-mass x-ray binary Scorpius X-1, using a hidden Markov model (HMM) to track spin wandering. This search improves on previous HMM-based searches of LIGO data by using an improved frequency domain matched filter, the J-statistic, and by analyzing data from Advanced LIGO's second observing run. In the frequency range searched, from 60 to 650 Hz, we find no evidence of gravitational radiation. At 194.6 Hz, the most sensitive search frequency, we report an upper limit on gravitational wave strain (at 95% confidence) of h095%=3.47×10-25 when marginalizing over source inclination angle. This is the most sensitive search for Scorpius X-1, to date, that is specifically designed to be robust in the presence of spin wandering.",
author = "Abbott, {B. P.} and R. Abbott and Abbott, {T. D.} and S. Abraham and F. Acernese and K. Ackley and C. Adams and Adhikari, {R. X.} and Adya, {V. B.} and C. Affeldt and M. Agathos and K. Agatsuma and N. Aggarwal and Aguiar, {O. D.} and L. Aiello and A. Ain and P. Ajith and G. Allen and A. Allocca and Aloy, {M. A.} and Altin, {P. A.} and A. Amato and S. Chua and J. Eichholz and Evans, {T. M.} and Forsyth, {P. W.F.} and Holland, {N. A.} and R. Inta and J. Junker and N. Kijbunchoo and Mansell, {G. L.} and M. Manske and McClelland, {D. E.} and McManus, {D. J.} and T. McRae and Mow-Lowry, {C. M.} and A. Mullavey and R. Schnabel and Scott, {S. M.} and Shaddock, {D. A.} and Slagmolen, {B. J.J.} and L. Sun and D. T{\"o}yr{\"a} and Wade, {A. R.} and Ward, {R. L.} and K. Wette and Whiting, {B. F.} and Wright, {J. L.} and Yap, {M. J.} and J. Zhang",
note = "Publisher Copyright: {\textcopyright} 2019 American Physical Society.",
year = "2019",
month = dec,
day = "4",
doi = "10.1103/PhysRevD.100.122002",
language = "English",
volume = "100",
journal = "Physical Review D",
issn = "2470-0010",
publisher = "American Physical Society",
number = "12",
}