LIGO Document P1700052-v20
- We report on an all-sky search for periodic gravitational waves in the frequency band 20-475 Hz
and with a frequency time derivative in the range of [-1.0, +0.1]E-8 Hz/s. Such a signal could be produced by
a nearby spinning and slightly non-axisymmetric isolated neutron star in our galaxy.
This search uses the data from Advanced LIGO's first observational run O1.
No gravitational wave signals were observed, and upper limits were placed on their strengths.
Our lowest upper limits on worst-case (linearly polarized) strain amplitude h0 are 4E-25 near 170 Hz.
For a circularly polarized source (most favorable orientation), the smallest
upper limits obtained are 1.5E-25.
The preceding upper limits refer to all sky locations and the entire range of frequency derivative values.
For a population-averaged ensemble of sky locations and stellar orientations,
the lowest upper limits obtained for the amplitude \( h_0 \) are 2.5E-25.
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