  We calculate a novel "magnetic contribution" to the dilepton spectrum in
heavy-ion collisions arising from interaction of relativistic quarks with
intense magnetic field. Synchrotron radiation by quarks, which can be
approximated by the equivalent photon flux, is followed by dilepton decay of
photons in intense magnetic field. We argue that "magnetic contribution"
dominates the dilepton spectrum at low lepton energies, whereas a conventional
photon dilepton decay dominates at higher lepton energies.
