Heavy ion collisions at the LHC produce a matter of deconfined quarks and gluons at unprecedented energy density and temperature. Partonic level interactions in the medium can be studied with the aid of electroweak bosons which carry important information about the properties of the medium.  Electroweak bosons form a class of unique probes because they and their decay products do not interact with the strongly-coupled medium, providing a standard candle for a variety of other phenomena measured with strongly interacting particles.  In addition, they are sensitive to possible modification of the nuclear parton distribution function.  The ATLAS experiment measures isolated high-pT photons, W and Z bosons via different decay channels in Pb+Pb collisions at sqrt(s)=2.76 TeV; these measurements will be presented.