  Ages and thermal luminosities of neutron stars, inferred from observations,
can be interpreted with the aid of the neutron star cooling theory to gain
information on the properties of superdense matter in neutron-star interiors.
We present a survey of estimated ages, surface temperatures and thermal
luminosities of middle-aged neutron stars with relatively weak or moderately
strong magnetic fields, which can be useful for these purposes. The catalogue
includes results selected from the literature, supplemented with new results of
spectral analysis of a few cooling neutron stars. The data are compared with
the theory. We show that overall agreement of theoretical cooling curves with
observations improves substantially for models where neutron superfluidity in
stellar core is weak.
