Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Status and recent results from the Pierre Auger Observatory   We present the status and the recent measurements from the Pierre Auger
Observatory. The energy spectrum will be described and its steepening
discussed. The mass composition is addressed with the measurements of the
variation of the depth of shower maximum with energy. We also report on upper
limits in the primary photon fraction. And finally, searches for anisotropies
of cosmic rays arrival directions are reported.

21
The categories of this paper are: adap-org
26
The categories of this paper are: bayes-an
20
The categories of this paper are: acc-phys
0
The categories of this paper are: hep-ph
7
The categories of this paper are: hep-th
35
The categories of this paper are: mtrl-th
14
The categories of this paper are: math-ph
12
The categories of this paper are: nucl-th
22
The categories of this paper are: chao-dyn
29
The categories of this paper are: funct-an
8
The categories of this paper are: hep-ex
34
The categories of this paper are: chem-ph
5
The categories of this paper are: gr-qc
4
The categories of this paper are: cond-mat
24
The categories of this paper are: dg-ga
36
The categories of this paper are: cmp-lg