In addition to IRAS data, broadband optical and near-infrared photometry (UBVRIJHK), broadband images (Cousins B and V and Gunn i) and optical spectra are available (JB90 and BJ95).
Blue and H-band magnitudes as well as far-infrared parameters of the sample galaxies are listed in Table 2 (click here), arranged as follows:
- Column 1: Galaxy number adapted from Johansson & Bergvall (1990).
- Columns 2 and 3: H-band magnitudes, taken from JB90
and blue magnitudes 
taken from the RC3.
- Columns 4 to 7: IRAS spectral flux densities at 12.5, 25, 60 and
m,
in Jy as given in the NED database.
- Column 8: The dust temperature 
has been derived from f60 and f100
by fitting a black body and assuming that the dust emissivity is proportional
to 
.
- Column 9: The far-infrared luminosities have been computed for the
m range using the relation given Lonsdale et al. (1985):
where f60 and f100 are the spectral flux densities
at 60 and 100 
m
measured in Jy by IRAS; 
(velocities in the radio convention).
Table 2: Blue and H-band magnitudes and far-infrared parameters
Far-infrared fluxes:
Thirty-eight galaxies of the sample have been detected by IRAS both at 60 and 100 m,
three at 
m only.
It is interesting to note that all galaxies but two have fluxes
at 60 and m lower than 5 and 8 Jy respectively.
In that respect, our sample differs from
most of the existing CO surveys of galaxies, in particular from the
most extensive one,
the FCRAO Extragalactic Survey
carried out by Young et al. (1995) for which the galaxies satisfy at least one
of the following criteria: (1) 
, (2) f60 > 5 Jy, or (3)
f100 > 10 Jy. Only seven galaxies of our sample meet the FCRAO selection
criterion.
The two objects of our sample with highest far-infrared fluxes
are the mergers JB07 and JB40. They
are the most luminous FIR sources of the sample
(9.1 1010 and 4.2 1011 
); they also have
the highest 
ratios. Their blue luminosities, however, are not
exceptionally high: 1010 and 
.
Figure 2 (click here)a shows histograms of the FIR and blue luminosities 
and LB.
Figure 2 (click here)b shows an histogram of the far-infrared temperatures .
Figure 2:
a) Histogram of 
(in white) and 
(in grey).
b) Histogram of
Optical and near-infrared photometry and images: Images presented in BJ95 show that star-formation is often distributed across the disks of the galaxies.
Optical spectroscopy:
Optical spectra presented in BJ95 arise from the central 
region
of the sample galaxies. Few emission lines are visible in the spectra,
suggesting that star-formation is not significanly enhanced in the central area.
This has to be confirmed in a quantitative analysis.
