How to calculate exited states in ATK, knowing that ATK doesn't do TD-DFT

[hadhemat]

Dear ATK staff,
I need to calculate excited states for my system (ZnO-biomolecule interface). I know that ATK does not support time dependant DFT. Is there a way in ATK to calculate the excited states for my system in ATK?
Thanks

[Anders Blom]

Not true excited states, no. But the Kohn-Sham orbitals above the Fermi level do provide some estimate of the excited levels, even if not formally correct...