Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Extending Gravitational Wave Extraction Using Weyl Characteristic Fields   We present a detailed methodology for extracting the full set of
Newman-Penrose Weyl scalars from numerically generated spacetimes without
requiring a tetrad that is completely orthonormal or perfectly aligned to the
principal null directions. We also describe how to implement an extrapolation
technique for computing the Weyl scalars' contribution at asymptotic null
infinity in postprocessing. These methods have been used to produce $\Psi_4$
and $h$ waveforms for the Simulating eXtreme Spacetimes (SXS) waveform catalog
and now have been expanded to produce the entire set of Weyl scalars. These new
waveform quantities are critical for the future of gravitational wave astronomy
in order to understand the finite-amplitude gauge differences that can occur in
numerical waveforms. We also present a new analysis of the accuracy of
waveforms produced by the Spectral Einstein Code. While ultimately we expect
Cauchy characteristic extraction to yield more accurate waveforms, the
extraction techniques described here are far easier to implement and have
already proven to be a viable way to produce production-level waveforms that
can meet the demands of current gravitational-wave detectors.

4
The categories of this paper are: cond-mat
36
The categories of this paper are: cmp-lg
2
The categories of this paper are: math
11
The categories of this paper are: hep-lat
31
The categories of this paper are: ao-sci
1
The categories of this paper are: cs
24
The categories of this paper are: dg-ga
37
The categories of this paper are: supr-con
35
The categories of this paper are: mtrl-th
23
The categories of this paper are: solv-int
6
The categories of this paper are: astro-ph
7
The categories of this paper are: hep-th
18
The categories of this paper are: econ
16
The categories of this paper are: stat
10
The categories of this paper are: q-bio
14
The categories of this paper are: math-ph