The spectrum of iota Her (HD 160762) 3780-4210Å - R=65000

Identification labels:
Interval: 340.1-340.2 nm---->label: 637  25.01 39826  474

637: last 3 digits of wavelengths in nm  lambda=340.1637 nm
25.01 = Mn II  25=atomic number of the element (Mn), 01=charge (II)
39826=lower enrgy level in cm-1
474=per mil residual intensity of isolated line before broadening (rotational + instrumental)