Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The CORALS Survey: A Review and Progress Report on The Search for Dust
  Obscured Quasar Absorption Line Systems   We present a brief overview of the ongoing Complete Optical and Radio
Absorption Line System (CORALS) survey. We review the results of our survey for
z>2.2 damped Lyman alpha systems (DLAs) and present the preliminary results of
an extended survey to lower redshifts (0.7<z<1.5). Although final observations
are still pending, our preliminary statistics do not find an excess of
absorption systems selected via MgII towards optically faint QSOs. We also
briefly review the results from some spin-off projects from CORALS including
the low alpha/Fe abundances of multiple DLAs and the possible excess of
absorbers within 3000 km/s of the QSO redshift.

36
The categories of this paper are: cmp-lg
25
The categories of this paper are: patt-sol
33
The categories of this paper are: plasm-ph
21
The categories of this paper are: adap-org
30
The categories of this paper are: q-alg
29
The categories of this paper are: funct-an
31
The categories of this paper are: ao-sci
15
The categories of this paper are: nucl-ex
7
The categories of this paper are: hep-th
16
The categories of this paper are: stat
12
The categories of this paper are: nucl-th
37
The categories of this paper are: supr-con
19
The categories of this paper are: eess
27
The categories of this paper are: comp-gas
22
The categories of this paper are: chao-dyn
3
The categories of this paper are: physics