Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: 100 GHz Room-Temperature Laboratory Emission Spectrometer   We present first results of a new heterodyne spectrometer dedicated to
high-resolution spectroscopy of molecules of astrophysical importance. The
spectrometer, based on a roomtemperature heterodyne receiver, is sensitive to
frequencies between 75 and 110 GHz with an instantaneous bandwidth of currently
2.5 GHz in a single sideband. The system performance, in particular the
sensitivity and stability, is evaluated. Proof of concept of this spectrometer
is demonstrated by recording the emission spectrum of methyl cyanide, CH3CN.
Compared to state-of-the-art radio telescope receivers the instrument is less
sensitive by about one order of magnitude. Nevertheless, the capability for
absolute intensity measurements can be exploited in various experiments, in
particular for the interpretation of the ever richer spectra in the ALMA era.
The ease of operation at room-temperature allows for long time integration, the
fast response time for integration in chirped pulse instruments or for
recording time dependent signals. Future prospects as well as limitations of
the receiver for the spectroscopy of complex organic molecules (COMs) are
discussed.

19
The categories of this paper are: eess
24
The categories of this paper are: dg-ga
30
The categories of this paper are: q-alg
29
The categories of this paper are: funct-an
27
The categories of this paper are: comp-gas
33
The categories of this paper are: plasm-ph
25
The categories of this paper are: patt-sol
18
The categories of this paper are: econ
20
The categories of this paper are: acc-phys
37
The categories of this paper are: supr-con
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The categories of this paper are: stat
9
The categories of this paper are: nlin
3
The categories of this paper are: physics
35
The categories of this paper are: mtrl-th
32
The categories of this paper are: atom-ph
36
The categories of this paper are: cmp-lg