  We investigate properties of the lasing action observed on the 1S0--3P1
intercombination transition of ytterbium atoms that are laser-cooled and
-trapped inside a high-finesse cavity. The dressing of the atomic states on the
1S0--1P1 transition by the magneto-optical trap (MOT) laser light allows the
coupled atom-cavity system to lase, via a two-photon transition, on the same
line on which it is pumped. The observation and basic description of this
phenomenon was presented earlier by Gothe et al. [Phys. Rev. A 99, 013415
(2019)]. In the current work, we focus on a detailed analysis of the lasing
threshold and frequency properties and perform a comparison to our theoretical
models.
