  We have used the XSHOOTER echelle spectrograph on the European Southern
Obseratory (ESO) Very Large Telescope (VLT) to obtain UVB-VIS-NIR
(ultraviolet-blue (UVB), visible (VIS) and near-infrared (NIR)) reflectance
spectra of two members of the Eureka family of L5 Mars Trojans, in order to
test a genetic relationship to Eureka. In addition to obtaining spectra, we
also carried out VRI photometry of one of the VLT targets using the 2-m
telescope at the Bulgarian National Astronomical Observatory - Rozhen and the
two-channel focal reducer. We found that these asteroids belong to the
olivine-dominated A, or Sa, taxonomic class. As Eureka itself is also an
olivine-dominated asteroid, it is likely that all family asteroids share a
common origin and composition. We discuss the significance of these results in
terms of the origin of the martian Trojan population.
