Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Infrared and visual lunar occultations measurements of stellar diameters
  and new binary stars detections at the Calar Alto 1.5m telescope   We present a program of routine lunar occultations, at optical and near-IR
wavelengths, recently started at the 1.5m Spanish telescope at the Calar Alto
Observatory. Both a CCD and an infrared array detector are used. The program is
aimed mainly at the detection and investigation of binary systems, although
results in other areas of stellar research are also anticipated.
  Occultations are reported for a total of 40 stars. Among these, SAO 164567,
SAO 78258 and AG+24 788 have been discovered to be binaries, with projected
separations as small as 0.006". Furthermore, binarity is suspected in the case
of SAO 78119 and SAO 79251. Additionally, the angular diameter of the late-type
giant 30 Psc and of the infrared star V349 Gem have been accurately measured,
this latter for the first time.
  We finally evaluate the instrumentation performance in terms of limiting
magnitude and angular resolution, and discuss applications to larger
telescopes.

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The categories of this paper are: q-alg
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The categories of this paper are: atom-ph
9
The categories of this paper are: nlin
31
The categories of this paper are: ao-sci
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The categories of this paper are: math-ph
16
The categories of this paper are: stat
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The categories of this paper are: mtrl-th
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The categories of this paper are: alg-geom
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The categories of this paper are: bayes-an
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The categories of this paper are: chao-dyn
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The categories of this paper are: econ
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The categories of this paper are: plasm-ph
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The categories of this paper are: adap-org
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The categories of this paper are: acc-phys
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The categories of this paper are: dg-ga
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The categories of this paper are: hep-th