Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Method of Measuring Cosmic Magnetic Fields with Ultra High Energy
  Cosmic Ray Data   We present a method to measure cosmic magnetic fields with ultra high energy
cosmic rays (UHECRs). We apply an advanced autocorrelation method to simulated
UHECRs which includes their directional as well as energy information. Without
explicit knowledge of the UHECR sources, such measurements are sensitive to the
number of sources and to the magnetic field strength subjected to the UHECRs.
Using a UHECR Monte Carlo model including sources, random walk propagation and
a coherent deflection, we explain the procedure of reconstructing the allowed
phase space of the model parameters from a simulated autocorrelation
measurement.

27
The categories of this paper are: comp-gas
31
The categories of this paper are: ao-sci
20
The categories of this paper are: acc-phys
28
The categories of this paper are: alg-geom
19
The categories of this paper are: eess
10
The categories of this paper are: q-bio
34
The categories of this paper are: chem-ph
35
The categories of this paper are: mtrl-th
4
The categories of this paper are: cond-mat
7
The categories of this paper are: hep-th
22
The categories of this paper are: chao-dyn
24
The categories of this paper are: dg-ga
5
The categories of this paper are: gr-qc
37
The categories of this paper are: supr-con
26
The categories of this paper are: bayes-an
1
The categories of this paper are: cs