Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Gravitational-wave Optical Transient Observer (GOTO)   The Gravitational-wave Optical Transient Observer (GOTO) is a wide-field
telescope project focused on detecting optical counterparts to
gravitational-wave sources. GOTO uses arrays of 40 cm unit telescopes (UTs) on
a shared robotic mount, which scales to provide large fields of view in a
cost-effective manner. A complete GOTO mount uses 8 unit telescopes to give an
overall field of view of 40 square degrees, and can reach a depth of 20th
magnitude in three minutes. The GOTO-4 prototype was inaugurated with 4 unit
telescopes in 2017 on La Palma, and was upgraded to a full 8-telescope array in
2020. A second 8-UT mount will be installed on La Palma in early 2021, and
another GOTO node with two more mount systems is planned for a southern site in
Australia. When complete, each mount will be networked to form a robotic,
dual-hemisphere observatory, which will survey the entire visible sky every few
nights and enable rapid follow-up detections of transient sources.

19
The categories of this paper are: eess
37
The categories of this paper are: supr-con
25
The categories of this paper are: patt-sol
15
The categories of this paper are: nucl-ex
7
The categories of this paper are: hep-th
1
The categories of this paper are: cs
30
The categories of this paper are: q-alg
18
The categories of this paper are: econ
36
The categories of this paper are: cmp-lg
31
The categories of this paper are: ao-sci
27
The categories of this paper are: comp-gas
0
The categories of this paper are: hep-ph
14
The categories of this paper are: math-ph
11
The categories of this paper are: hep-lat
32
The categories of this paper are: atom-ph
26
The categories of this paper are: bayes-an