Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Infrared imaging and off-nuclear spectroscopy of quasar hosts   We present the results of two complementary ground-based programmes to
determine the host galaxy properties of radio-quiet and radio-loud quasars and
to compare them with those of radio galaxies. Both infrared images and optical
off-nuclear spectra were obtained and we discuss the various strategies used to
separate the quasar-related emission from that of the underlying galaxy.
However, the key feature of this project is the use of carefully matched
samples, which ensure that the data for different types of object are directly
comparable.

14
The categories of this paper are: math-ph
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The categories of this paper are: stat
13
The categories of this paper are: quant-ph
5
The categories of this paper are: gr-qc
24
The categories of this paper are: dg-ga
21
The categories of this paper are: adap-org
11
The categories of this paper are: hep-lat
0
The categories of this paper are: hep-ph
32
The categories of this paper are: atom-ph
22
The categories of this paper are: chao-dyn
29
The categories of this paper are: funct-an
28
The categories of this paper are: alg-geom
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The categories of this paper are: patt-sol
7
The categories of this paper are: hep-th
2
The categories of this paper are: math
26
The categories of this paper are: bayes-an