Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Hubble diagram in a Bianchi I univers   The Bianchi I metric describes a homogeneous, but anisotropic universe and is
commonly used to fit cosmological data. A fit to the angular distribution of
740 supernovae of type Ia with measured redshift and apparent luminosity is
presented. It contains an intriguing, yet non-significant signal of a preferred
direction in the sky. The Large Synoptic Survey Telescope being built in Chile
should measure some 500 000 supernovae within the next 20 years and verify or
falsify this signal.

17
The categories of this paper are: q-fin
29
The categories of this paper are: funct-an
0
The categories of this paper are: hep-ph
20
The categories of this paper are: acc-phys
21
The categories of this paper are: adap-org
3
The categories of this paper are: physics
33
The categories of this paper are: plasm-ph
10
The categories of this paper are: q-bio
27
The categories of this paper are: comp-gas
1
The categories of this paper are: cs
32
The categories of this paper are: atom-ph
5
The categories of this paper are: gr-qc
11
The categories of this paper are: hep-lat
15
The categories of this paper are: nucl-ex
37
The categories of this paper are: supr-con
31
The categories of this paper are: ao-sci