Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Near-Infrared Photometry of Irregular Satellites of Jupiter and Saturn   We present JHKs photometry of 10 Jovian and 4 Saturnian irregular satellites,
taken with the Near-InfraRed Imager (NIRI) at the 8-m Gemini North Observatory
on Mauna Kea, Hawaii. The observed objects have near-infrared colors consistent
with C, P and D-type asteroids, although J XII Ananke and S IX Phoebe show weak
indications of possible water features in the H filter. The four members of the
Himalia-family have similar near-infrared colors, as do the two members of the
Gallic family, S XX Paaliaq and S XXIX Siarnaq. From low resolution normalized
reflectance spectra based on the broadband colors and covering 0.4 to 2.2
microns, the irregular satellites are identified as C-type (J VII Pasiphae, J
VI Himalia and S IX Phoebe), P-type (J XII Ananke and J XVIII Themisto) and
D-type (J IX Carme and J X Sinope), showing a diversity of origins of these
objects.

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The categories of this paper are: cmp-lg
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The categories of this paper are: atom-ph
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The categories of this paper are: econ
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The categories of this paper are: hep-ex
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The categories of this paper are: q-fin
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The categories of this paper are: supr-con
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The categories of this paper are: adap-org
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The categories of this paper are: bayes-an
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The categories of this paper are: gr-qc
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The categories of this paper are: q-alg
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The categories of this paper are: cond-mat
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The categories of this paper are: stat
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The categories of this paper are: cs
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The categories of this paper are: comp-gas
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The categories of this paper are: eess
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The categories of this paper are: quant-ph