Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The CRONA (Caltech-Roma-Napoli) project   The CRONA project is a joint enterprise between Caltech and the astronomical
observatory of Rome and Naples aimed to the photometric calibration of the
Second Palomar Sky Survey (POSS-II) plates and to the construction of a
complete photometric and astrometric catalogue of all objects present on the
POSS-II. The calibrated final catalogues of objects will be made available to
the community. We present here a comparison between the performances of the
SKICAT and DAOPHOT packages applied to POSS-II images of the globular cluster
M92.

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The categories of this paper are: solv-int
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The categories of this paper are: cmp-lg
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The categories of this paper are: physics
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The categories of this paper are: stat
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The categories of this paper are: q-alg
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The categories of this paper are: nucl-ex
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The categories of this paper are: supr-con
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The categories of this paper are: atom-ph
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The categories of this paper are: q-fin
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The categories of this paper are: gr-qc
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The categories of this paper are: funct-an
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The categories of this paper are: chao-dyn
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The categories of this paper are: acc-phys
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The categories of this paper are: math-ph
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The categories of this paper are: chem-ph
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The categories of this paper are: mtrl-th