  Photoelectron emission from excited states of laser-dressed atomic helium is
analyzed with respect to laser intensity-dependent excitation energy shifts and
angular distributions. In the two-color XUV (exteme ultra\-violet) -- IR
(infrared) measurement, the XUV photon energy is scanned between
\SI{20.4}{\electronvolt} and the ionization threshold at
\SI{24.6}{\electronvolt}, revealing electric dipole-forbidden transitions for a
temporally overlapping IR pulse ($\sim\!\SI{e12}{\watt\per
\centi\meter\squared}$). The interpretation of the experimental results is
supported by numerically solving the time-dependent Schr\"odinger equation in a
single-active-electron approximation.
