The following document lists the file abstract/GDEZOTTI_PROP_001.abs
from catalogue VI/111.
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We propose observations in two CAM filters (LW2 and LW3) of the deep IRAS survey sample (IDS; Hacking et al 1987), complete for S(60micron)> 50mJy over an area of 6.25 sq. deg., plus measurements with the PHT C100 array of the sources lacking reliable IRAS 100micron fluxes. These observations will: i) provide essential complementary information to the deep surveys to be carried out in the same CAM filters within the Guaranteed Time programme, allowing a direct estimate of the local luminosity function of galaxies in the 2 wavebands, almost doubling the range in logS over which galaxy counts are estimated (at least in the LW2 band), and providing a direct link to the IRAS counts; ii) allow, together with IRAS data, a systematic study of the broadband spectral properties of a complete, far-IR selected sample, covering a particularly interesting redshift range, extending up to, at least, z 0.3, where optical and sub-mJy radio surveys indicate a significant excess of faint blue galaxies (the IDS sample has constituted, so far, the observational basis on which studies of far-IR evolution of galaxies rely). Multifrequency measurements in the far-IR are essential to classify the sources (some models imply that a few sources may be highly obscured z 1 galaxies, difficult to identify optically, but with characteristic far-IR colours), to single out "hot" objects, possibly hiding obscured AGN's, to get insight into the abundance and physical conditions of dust, to determine bolometric luminosities. The total observing time (including all overheads) is 27.4 hours, of which 20.75 hours correspond to top priority observations.