Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The absorbers towards Q0836+113   We have performed RIJHK_S imaging of the field around the z=2.67 quasar
Q0836+113, which presents several metal line and a damped Ly\alpha absorption
systems in its spectrum. The images reveal the existence of a red K_S=18.9
object \approx 11 arcsec from the quasar. On the basis of the empirical
relationships between absorption radius and luminosity we conclude that this
object may be the CIV absorber at z=1.82. This could be the first detection of
a high redshift galaxy causing high-ionisation absorption. After carefully
subtracting the QSO, we do not detect, up to a 3\sigma limiting magnitude for
extended objects of K_S=20.8, the damped Ly\alpha absorber apparently detected
as a Ly\alpha emitter at z=2.47. It is also suggested, that object ``SW'' from
Wolfe et al. (1992) could be the galaxy responsible for the claimed MgII
absorption at z=0.37.

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The categories of this paper are: gr-qc
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The categories of this paper are: stat
1
The categories of this paper are: cs
22
The categories of this paper are: chao-dyn
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The categories of this paper are: nlin
31
The categories of this paper are: ao-sci
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The categories of this paper are: math-ph
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The categories of this paper are: eess
21
The categories of this paper are: adap-org
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The categories of this paper are: q-alg
34
The categories of this paper are: chem-ph
10
The categories of this paper are: q-bio
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The categories of this paper are: hep-th
18
The categories of this paper are: econ
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The categories of this paper are: mtrl-th
37
The categories of this paper are: supr-con