  A summary of starburst luminosities based on PAH features is given for 243
starburst galaxies with 0 < z < 2.5, observed with the Spitzer Infrared
Spectrograph. Luminosity vLv(7.7um) for the peak luminosity of the 7.7um PAH
emission feature is found to scale as log[vLv(7.7um)] = 44.63(+-0.09) +
2.48(+-0.28)log(1+z) for the most luminous starbursts observed. Empirical
calibrations of vLv(7.7um) are used to determine bolometric luminosity Lir and
the star formation rate (SFR) for these starbursts. The most luminous
starbursts found in this sample have log Lir = 45.4(+-0.3) +
2.5(+-0.3)log(1+z), in ergs per s, and the maximum star formation rates for
starbursts in units of solar masses per yr are log(SFR) = 2.1(+-0.3) +
2.5(+-0.3)log(1+z), up to z = 2.5. The exponent for pure luminosity evolution
agrees with optical and radio studies of starbursts but is flatter than
previous results based in infrared source counts. The maximum star formation
rates are similar to the maxima determined for submillimeter galaxies; the most
luminous individual starburst included within the sample has log Lir = 46.9,
which gives a SFR = 3400 solar masses per yr.
