Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Soft X-ray Imager (SXI) on-board the THESEUS mission   We summarize in this contribution the capabilities, design status, and the
en- abling technologies of the Soft X-ray Imager (SXI) planned to be on-board
the THESEUS mission. We describe its central role in making THESEUS a powerful
machine to probe the physical conditions of the early Universe (close to the
reionization era) and to explore the time-domain Universe.

16
The categories of this paper are: stat
35
The categories of this paper are: mtrl-th
33
The categories of this paper are: plasm-ph
26
The categories of this paper are: bayes-an
3
The categories of this paper are: physics
10
The categories of this paper are: q-bio
20
The categories of this paper are: acc-phys
36
The categories of this paper are: cmp-lg
4
The categories of this paper are: cond-mat
14
The categories of this paper are: math-ph
5
The categories of this paper are: gr-qc
29
The categories of this paper are: funct-an
15
The categories of this paper are: nucl-ex
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The categories of this paper are: q-fin
21
The categories of this paper are: adap-org
32
The categories of this paper are: atom-ph