Occultations of stars by the Moon are of interest in astronomy for measurements of lunar topography, measurements and even discovery of double stars, as well as measurement of angular diameters of stars.
For these applications, very precise timing is necessary and is complemented by photometric measurements.
In the case of the Zubenelgenubi occultation, the captures were made with 5ms frames, allowing high resolution in time, and supported by a Stratum 1 time server: