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==> 4542s grade 3 time, for which we ask for an upgrade
==> is to be transferred from RCHINI.PROSTATA
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A multi-wavelength ISOPHOT study is proposed to measure the IR energy
distributions of a sample of protostar candidates.  During a recent
ground-based survey at the IRAM 30m, SEST and JCMT, we have discovered
a number of so far unknown sources of strong mm emission.  Because
none of the sources has been detected by IRAS, they are the coldest
and densest dust condensations ever found. The proposed ISOPHOT
measurements will be combined with our existing mm/submm photometry in
order to determine temperature, luminosity, mass, and evolutionary
status of these young objects. Microscanning with ISOCAM will be
performed to reveal possible embedded stellar sources. So far one of
our targets (Circinus-MMS) has been observed with ISOCAM and ISOPHOT
and was detected in all bands. Interestingly, the spectral energy
distribution increases until 200 mic, suggesting the presence of a
large amount of cold (T<15K) dust. Our model fits to the entire SED
indicate that the heating is provided by an internal source. This
example demonstrates that our sample consists of true cold
protostellar objects and justifies the follow-up observations for the
remaining targets.