The Butcher-Oemler effect in moderate redshift galaxy clusters where a larger
fraction of blue galaxies is seen is most readily explained as the result of
increased star formation in some galaxies. Spectroscopically, these galaxies
show a composite spectrum indicative of starburst having occurred about 1 Gyr
ago, and are called E+A because the spectra appear to have A stars added to
an old elliptical-type spectrum. A number of E+A galaxies have been found in
the Coma cluster which provides the chance of characterizing the starbursts
more thoroughly be measuring the bolometric output of these galaxies. These
galaxies are faint enough at 10-100 microns that they must be observed with
ISO.