Absolute frequencies of cooling and pumping transitions for Thulium optical lattice clock and cold gas studies

•Absolute frequency of the first-stage cooling transition at 410.6 nm in thulium is measured with 1MHz uncertainty (γ410.6=10 MHz).•Absolute frequency of the second-stage cooling transition at 530.7 nm in thulium is measured with 16 kHz uncertainty (γ530.7=350 kHz).•Absolute frequency of the pumping transition at 418.8 nm in thulium is measured with 1.2MHz uncertainty (γ418.8=10 MHz).•All lasers used in the thulium optical clock (reported in this work and clock laser at 1140 nm and optical lattice laser at 1064 nm) can be measured and/or stabilized using an optical frequency comb with the output spectrum covering 820–1140 nm.