TY - JOUR

T1 - First all-sky search for continuous gravitational waves from unknown sources in binary systems

AU - Lockerbie, Nicholas

AU - Tokmakov, Kirill

AU - LIGO Scientific Collaboration

N1 - Additional Authors: Gammaitoni, Luca/B-5375-2009; Marchesoni, Fabio/A-1920-2008; Gemme, Gianluca/C-7233-2008; Iyer, Bala R./E-2894-2012; prodi, giovanni/B-4398-2010 Marchesoni, Fabio/0000-0001-6422-2516; Gemme, Gianluca/0000-0002-1127-7406;

PY - 2014/9/15

Y1 - 2014/9/15

N2 - We present the first results of an all-sky search for continuous gravitational waves from unknown spinning neutron stars in binary systems using LIGO and Virgo data. Using a specially developed analysis program, the TwoSpect algorithm, the search was carried out on data from the sixth LIGO science run and the second and third Virgo science runs. The search covers a range of frequencies from 20 Hz to 520 Hz, a range of orbital periods from 2 to similar to 2,254 h and a frequency-and period-dependent range of frequency modulation depths from 0.277 to 100 mHz. This corresponds to a range of projected semimajor axes of the orbit from similar to 0.6 x 10(-3) ls to similar to 6,500 ls assuming the orbit of the binary is circular. While no plausible candidate gravitational wave events survive the pipeline, upper limits are set on the analyzed data. The most sensitive 95% confidence upper limit obtained on gravitational wave strain is 2.3 x 10(-24) at 217 Hz, assuming the source waves are circularly polarized. Although this search has been optimized for circular binary orbits, the upper limits obtained remain valid for orbital eccentricities as large as 0.9. In addition, upper limits are placed on continuous gravitational wave emission from the low-mass x-ray binary Scorpius X-1 between 20 Hz and 57.25 Hz.

AB - We present the first results of an all-sky search for continuous gravitational waves from unknown spinning neutron stars in binary systems using LIGO and Virgo data. Using a specially developed analysis program, the TwoSpect algorithm, the search was carried out on data from the sixth LIGO science run and the second and third Virgo science runs. The search covers a range of frequencies from 20 Hz to 520 Hz, a range of orbital periods from 2 to similar to 2,254 h and a frequency-and period-dependent range of frequency modulation depths from 0.277 to 100 mHz. This corresponds to a range of projected semimajor axes of the orbit from similar to 0.6 x 10(-3) ls to similar to 6,500 ls assuming the orbit of the binary is circular. While no plausible candidate gravitational wave events survive the pipeline, upper limits are set on the analyzed data. The most sensitive 95% confidence upper limit obtained on gravitational wave strain is 2.3 x 10(-24) at 217 Hz, assuming the source waves are circularly polarized. Although this search has been optimized for circular binary orbits, the upper limits obtained remain valid for orbital eccentricities as large as 0.9. In addition, upper limits are placed on continuous gravitational wave emission from the low-mass x-ray binary Scorpius X-1 between 20 Hz and 57.25 Hz.

KW - continuous gravitational wave

KW - spinning neutron stars

KW - binary systems

KW - LIGO scientific collaboration

UR - http://journals.aps.org/prd/abstract/10.1103/PhysRevD.90.062010

U2 - 10.1103/PhysRevD.90.062010

DO - 10.1103/PhysRevD.90.062010

M3 - Article

SN - 1550-7998

VL - 90

JO - Physical Review D

JF - Physical Review D

IS - 6

M1 - 062010

ER -