  The electromagnetic properties of baryons containing a heavy quark are
calculated at next-to-leading order in partially quenched heavy hadron chiral
perturbation theory. Calculations are performed for three light flavors in the
isospin limit and additionally for two light non-degenerate flavors. We use
partially-quenched charge matrices that are easy to implement on the lattice.
The results presented are necessary for the light quark mass extrapolation and
zero-momentum extrapolation of lattice QCD and partially quenched lattice QCD
calculations of heavy hadron electromagnetic properties. Additionally relations
between the sextet electromagnetic form factors and transition form factors are
derived.
