Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: First Cosmology Results Using Type Ia Supernovae From the Dark Energy
  Survey: Survey Overview and Supernova Spectroscopy   We present spectroscopy from the first three seasons of the Dark Energy
Survey Supernova Program (DES-SN). We describe the supernova spectroscopic
program in full: strategy, observations, data reduction, and classification. We
have spectroscopically confirmed 307 supernovae, including 251 type Ia
supernovae (SNe Ia) over a redshift range of $0.017 < z < 0.85$. We determine
the effective spectroscopic selection function for our sample, and use it to
investigate the redshift-dependent bias on the distance moduli of SNe Ia we
have classified. We also provide a full overview of the strategy, observations,
and data products of DES-SN, which has discovered 12,015 likely supernovae
during these first three seasons. The data presented here are used for the
first cosmology analysis by DES-SN ('DES-SN3YR'), the results of which are
given in DES Collaboration (2018a).

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The categories of this paper are: patt-sol
33
The categories of this paper are: plasm-ph
2
The categories of this paper are: math
16
The categories of this paper are: stat
31
The categories of this paper are: ao-sci
10
The categories of this paper are: q-bio
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The categories of this paper are: adap-org
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The categories of this paper are: eess
5
The categories of this paper are: gr-qc
29
The categories of this paper are: funct-an
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The categories of this paper are: nucl-ex
9
The categories of this paper are: nlin
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The categories of this paper are: chao-dyn
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The categories of this paper are: bayes-an
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The categories of this paper are: cond-mat
37
The categories of this paper are: supr-con