eso9949 — Pressemitteilung
VLT Commissioning Data Now Publicly Available
29. November 1999: "First Light" was achieved in May 1998 for VLT ANTU, the first 8.2-m Unit Telescope at the Paranal Observatory. Since then, thousands of detailed images and spectra of a great variety of celestial objects have been recorded with this major new research facility. While some of these were obtained for scientific programmes and were therefore directed towards specific research needs, others were made during the "Commissioning Phases" in 1998/99 for the two major astronomical instruments, FORS1 (FOcal Reducer and Spectrograph) and ISAAC (Infrared Spectrometer And Array Camera). They were carried out in order to test thoroughly the performance of the telescope and its instruments before the new facility was handed over to the astronomers on April 1, 1999. The Commissioning data are accordingly of variable quality and, contrarily to the science data, normally not intensity calibrated. However, while some of these frames are short test exposures that mainly served to ascertain the image quality under various observing conditions, a substantial fraction still contains scientifically valuable data.