Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: SCUBA: A common-user submillimetre camera operating on the James Clerk
  Maxwell Telescope   SCUBA, the Submillimetre Common-User Bolometer Array, built by the Royal
Observatory Edinburgh for the James Clerk Maxwell Telescope, is the most
versatile and powerful of a new generation of submillimetre cameras. It
combines a sensitive dual-waveband imaging array with a three-band photometer,
and is sky-background limited by the emission from the Mauna Kea atmosphere at
all observing wavelengths from 350 microns to 2 mm. The increased sensitivity
and array size mean that SCUBA maps close to 10,000 times faster than its
single-pixel predecessor (UKT14). SCUBA is a facility instrument, open to the
world community of users, and is provided with a high level of user support. We
give an overview of the instrument, describe the observing modes and user
interface, performance figures on the telescope, and present a sample of the
exciting new results that have revolutionised submillimetre astronomy.

17
The categories of this paper are: q-fin
19
The categories of this paper are: eess
22
The categories of this paper are: chao-dyn
29
The categories of this paper are: funct-an
35
The categories of this paper are: mtrl-th
3
The categories of this paper are: physics
5
The categories of this paper are: gr-qc
7
The categories of this paper are: hep-th
15
The categories of this paper are: nucl-ex
9
The categories of this paper are: nlin
4
The categories of this paper are: cond-mat
34
The categories of this paper are: chem-ph
0
The categories of this paper are: hep-ph
30
The categories of this paper are: q-alg
26
The categories of this paper are: bayes-an
37
The categories of this paper are: supr-con