Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Far-Infrared photometry of a statistical sampleof late-type Virgo
  Cluster galaxies   We present deep diffraction-limited far-infrared (FIR) strip maps of a sample
of 63 galaxies later than S0 and brighter than B_T 16.8, selected from the
Virgo Cluster Catalogue of Binggeli, Sandage & Tammann. The ISOPHOT instrument
on board the Infrared Space Observatory was used to achieve sensitivities
typically an order of magnitude deeper than IRAS in the 60 and 100 micron bands
and to reach the confusion limit at 170 microns. The averaged 3 sigma upper
limits for integrated flux densities of point sources at 60, 100 and 170
microns are 43, 33 and 58 mJy, respectively. 54 galaxies (85.7 percent) are
detected at least at one wavelength, and 40 galaxies (63.5 percent) are
detected at all three wavelengths. The highest detection rate (85.7 percent) is
in the 170 micron band. In many cases the galaxies are resolved, allowing the
scale length of the infrared disks to be derived from the oversampled
brightness profiles in addition to the spatially integrated emission. The data
presented should provide the basis for a variety of statistical investigations
of the FIR spectral energy distributions of gas rich galaxies in the local
universe spanning a broad range in star-formation activity and morphological
types, including dwarf systems and galaxies with rather quiescent star
formation activity.

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The categories of this paper are: patt-sol
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The categories of this paper are: gr-qc
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The categories of this paper are: quant-ph
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The categories of this paper are: hep-lat
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The categories of this paper are: q-alg
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The categories of this paper are: supr-con
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The categories of this paper are: math
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The categories of this paper are: ao-sci
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The categories of this paper are: physics
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The categories of this paper are: q-fin
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The categories of this paper are: solv-int
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The categories of this paper are: chem-ph
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The categories of this paper are: nucl-ex
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The categories of this paper are: nucl-th
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The categories of this paper are: hep-th
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The categories of this paper are: chao-dyn