Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Radio-detection of extensive air showers at the Pierre Auger Observatory
  - Results and enhancements   The Pierre Auger Collaboration is exploring the potential of radio-detection
techniques to measure the extensive air showers. The main advantage of these
setups is the possibility to cover a large area with no atmospheric attenuation
and having 100% duty cycle. Radio emission in the MHz range is recorded by the
Auger Engineering Radio Array (AERA), presently consisting of 124 stations
distributed over an area of approximately 6 km$^2$. This enhancement is focused
on physics of cosmic rays with an energy greater than 10$^{17}$ eV. In
addition, novel detection techniques based on the GHz emission from extensive
air showers are being tested at the Pierre Auger Observatory. Three different
setups are currently installed and are collecting data: MIDAS (Microwave
Detection of Air Showers) and AMBER (Air-shower Microwave Bremsstrahlung
Experimental Radiometer) are prototypes of an imaging parabolic dish detector,
while EASIER (Extensive Air Shower Identification using Electron Radiometer)
records the radio emission by antenna horns located on more than 60 surface
detector units. The status of these different activities and the new results in
MHz and GHz bands will be reported.

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The categories of this paper are: econ
9
The categories of this paper are: nlin
33
The categories of this paper are: plasm-ph
10
The categories of this paper are: q-bio
15
The categories of this paper are: nucl-ex
22
The categories of this paper are: chao-dyn
32
The categories of this paper are: atom-ph
30
The categories of this paper are: q-alg
17
The categories of this paper are: q-fin
13
The categories of this paper are: quant-ph
35
The categories of this paper are: mtrl-th
29
The categories of this paper are: funct-an
37
The categories of this paper are: supr-con
11
The categories of this paper are: hep-lat
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The categories of this paper are: adap-org
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The categories of this paper are: patt-sol