The engineering telemetry for this time period has not yet been received. Let DADS know if U2SL0N0AT disappears next time we sarcgen. The stability of the FOS Red side wavelength scale and spectral locations will be measured. All observations are internals. These observations appear to have executed as planned.
All exposures are internals.
The objective is to derive the mass distribution of the lensing cluster by measuring the distortion of background galaxies. Knowing the mass distribution of the cluster, and the time delay between variations in the two components of the lensed QSO, it is possible to compute the Hubble Constant.