Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Observation of the Perseus galaxy cluster with the MAGIC telescopes   The MAGIC ground-based Imaging Cherenkov experiment observed the Perseus
galaxy cluster for a total of about 25 hr between November and December 2008 in
single telescope mode and for nearly 90 hr between October 2009 and February
2011 in stereoscopic mode. This survey represents the deepest observation of a
cluster of galaxies at very high energies ever. It resulted in the detection of
the central radio galaxy NGC 1275 and the head-tail radio galaxy IC 310. It
also permits for the first time to put constraints on emission models
predicting gamma-rays from cosmic ray acceleration in the cluster and to
investigate dark matter scenarios. Here, we will report the latest MAGIC
results on these studies.

16
The categories of this paper are: stat
35
The categories of this paper are: mtrl-th
8
The categories of this paper are: hep-ex
33
The categories of this paper are: plasm-ph
19
The categories of this paper are: eess
9
The categories of this paper are: nlin
21
The categories of this paper are: adap-org
4
The categories of this paper are: cond-mat
27
The categories of this paper are: comp-gas
0
The categories of this paper are: hep-ph
5
The categories of this paper are: gr-qc
37
The categories of this paper are: supr-con
18
The categories of this paper are: econ
2
The categories of this paper are: math
7
The categories of this paper are: hep-th
17
The categories of this paper are: q-fin