Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: An Algorithm to locate the centers of Baryon Acoustic Oscillations   The cosmic structure formed from Baryon Acoustic Oscillations (BAO) in the
early universe is imprinted in the galaxy distribution observable in large
scale surveys, and is used as a standard ruler in contemporary cosmology. BAO
are typically detected as a preferential length scale in two point statistics,
which gives little information about the location of BAO structures in real
space. The aim of the algorithm described in this paper is to find probable
centers of BAO in the cosmic matter distribution. The algorithm convolves the
three dimensional distribution of matter density with a spherical shell kernel
of variable radius placed at different locations. The locations that correspond
to the highest values of the convolution correspond to the probable centers of
BAO. This method is realized in an open-source, computationally efficient
algorithm. We describe the algorithm and present the results of applying it to
the SDSS DR9 CMASS survey and associated mock catalogs. A detailed performance
study demonstrates the algorithm's ability to locate BAO centers, and in doing
so presents a novel detection of the BAO scale in galaxy surveys.

17
The categories of this paper are: q-fin
30
The categories of this paper are: q-alg
22
The categories of this paper are: chao-dyn
18
The categories of this paper are: econ
16
The categories of this paper are: stat
32
The categories of this paper are: atom-ph
3
The categories of this paper are: physics
27
The categories of this paper are: comp-gas
34
The categories of this paper are: chem-ph
28
The categories of this paper are: alg-geom
31
The categories of this paper are: ao-sci
10
The categories of this paper are: q-bio
9
The categories of this paper are: nlin
26
The categories of this paper are: bayes-an
8
The categories of this paper are: hep-ex
2
The categories of this paper are: math