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==> In this proposal, more time is being requested for MBIRKINS.PROP_001
==> This proposal requests an upgrade from Priority 3 for MBIRKINS.PROP_001
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Nearby radio galaxies provide excellent sites for the study of the active
galaxy phenomenon at low powers, including the formation of radio jets, the
properties of active galactic nuclei, and the nature of the fuel source.
Here we propose multi-band IR imaging of nearby radio galaxies for which
good radio-to-X-ray data are available.  ISOCAM images will be taken in the
LW1, LW2, and LW3 bands.  This allows the removal of galactic starlight, so
that we can map the nuclear IR emission at a sensitivity that cannot be
attained from the ground.  We expect to detect IR synchrotron emission from
some inner jets and to derive accurate IR colours for the active nuclei.
So far we have received data for four of our objects observed under
MBIRKINS.PROP_001.  All four were clearly detected, all show emission from
their nuclei, and two show asymmetrical features that may be the IR
counterparts of their jets.  The observations proposed here should reveal
more such structures, through completing the sample requested in our
previous ISO proposal and extending it to higher redshift.  The sample is
interesing of itself, and complements existing ISO images of radio-quiet
early-type galaxies (in the field and the Virgo and Perseus clusters) at
similar redshift and radio-loud high-redshift galaxies.
Our first priority is to complete observations of the z < 0.03 sample (four
objects need imaging and an upgrade to higher priority is requested through
the present proposal).  Second, we propose to observe the four objects
needed to extend the sample to z = 0.05.  At lower priority, we wish to take
one- or two-band images of five objects in the z < 0.03 sample, and one in
the z < 0.05 sample, for which incomplete colour information exists.