Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Noise and the strong signal limit in radio astronomical measurement   The random error of radioastronomical measurements is usually computed in the
weak-signal limit, which assumes that the system temperature is sensibly the
same on and off source, or with and without a spectral line. This assumption is
often very poor. We give examples of common situations in which it is important
to distinguish the system noise in signal-bearing and signal-free regions.

25
The categories of this paper are: patt-sol
33
The categories of this paper are: plasm-ph
13
The categories of this paper are: quant-ph
21
The categories of this paper are: adap-org
19
The categories of this paper are: eess
14
The categories of this paper are: math-ph
10
The categories of this paper are: q-bio
0
The categories of this paper are: hep-ph
24
The categories of this paper are: dg-ga
26
The categories of this paper are: bayes-an
23
The categories of this paper are: solv-int
2
The categories of this paper are: math
3
The categories of this paper are: physics
15
The categories of this paper are: nucl-ex
27
The categories of this paper are: comp-gas
32
The categories of this paper are: atom-ph