Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: BRITE-Constellation: nanosatellites for precision photometry of bright
  stars   BRITE-Constellation (where BRITE stands for BRIght Target Explorer) is an
international nanosatellite mission to monitor photometrically, in two colours,
the brightness and temperature variations of stars generally brighter than
mag(V) ~ 4, with precision and time coverage not possible from the ground.
  The current mission design consists of six nanosats (hence Constellation):
two from Austria, two from Canada, and two from Poland. Each 7 kg nanosat
carries an optical telescope of aperture 3 cm feeding an uncooled CCD. One
instrument in each pair is equipped with a blue filter, the other with a red
filter. Each BRITE instrument has a wide field of view (~24 degrees), so up to
about 15 bright stars can be observed simultaneously, sampled in 32 pixel x 32
pixel sub-rasters. Photometry of additional fainter targets, with reduced
precision but thorough time sampling, will be possible through onboard data
processing.
  The BRITE sample is dominated by the most intrinsically luminous stars:
massive stars seen at all evolutionary stages, and evolved medium-class stars
at the very end of their nuclear burning phases. The goals of
BRITE-Constellation are to (1) measure p- and g-mode pulsations to probe the
interiors and ages of stars through asteroseismology; (2) look for varying
spots on the stars surfaces carried across the stellar disks by rotation, which
are the sources of co-rotating interaction regions in the winds of the most
luminous stars, probably arising from magnetic subsurface convection; and (3)
search for planetary transits.

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The categories of this paper are: solv-int
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The categories of this paper are: hep-ex
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The categories of this paper are: acc-phys
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The categories of this paper are: cond-mat
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The categories of this paper are: cs
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The categories of this paper are: math-ph
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The categories of this paper are: plasm-ph
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The categories of this paper are: ao-sci
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The categories of this paper are: q-fin
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The categories of this paper are: funct-an
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The categories of this paper are: nucl-th
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The categories of this paper are: nucl-ex
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The categories of this paper are: hep-lat
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The categories of this paper are: supr-con
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The categories of this paper are: physics
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The categories of this paper are: chem-ph