Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Redshift of the Lensed Object in the Einstein Ring B0218+357   We present a secure redshift of z=0.944\pm0.002 for the lensed object in the
Einstein ring gravitational lens B0218+357 based on five broad emission lines,
in good agreement with our preliminary value announced several years ago based
solely on the detection of a single emission line.

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The categories of this paper are: bayes-an
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The categories of this paper are: hep-ex
16
The categories of this paper are: stat
18
The categories of this paper are: econ
15
The categories of this paper are: nucl-ex
32
The categories of this paper are: atom-ph
30
The categories of this paper are: q-alg
12
The categories of this paper are: nucl-th
21
The categories of this paper are: adap-org
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The categories of this paper are: patt-sol
13
The categories of this paper are: quant-ph
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The categories of this paper are: dg-ga
1
The categories of this paper are: cs
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The categories of this paper are: eess
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The categories of this paper are: chao-dyn
33
The categories of this paper are: plasm-ph