The Gemini High Resolution Optical Spectrograph (GHOST) is the next generation high resolution spectrograph for the Gemini South Observatory, and this has recently been commissioned in May 2021. In a single exposure, it can obtain the full optical spectrum from blueward of 360nm to beyond 1 micron. Two modes of operation mean that either one object can be observed at R~80000, or two objects can be observed at R~55000. First light results have tested all aspects of the scientific performance of GHOST from the science user perspective, including a range of aquisition procedures and its two spectral resolution modes. On-sky observations of scientific and library targets reveal GHOST to be the most sensitive spectrograph across the full optical range of any of the 8-10m class spectrographs currently in operation. This paper presents a full discussion of the commissioning process, tests, on-sky performance and first science observations.
Service mode observations at ESO's Paranal Observatory relies on the ability to grade science observations. The grading criteria, as defined by the submitter of the program are based mainly on external conditions (e.g. sky transparency, atmospheric seeing) and the grading is done by the night crew immediately after the observations.
One of the top-level requirements for operating the E-ELT is to improve observation grading scheme by including criteria based on pipeline-reduced science data. The implementation of a science data grading for a range of different instruments and data types requires the development of new versatile software tools. They would feature real time data visualization, the ability to measure a variety of data quality indicators and able to render the necessary information to the night operators in order to properly grade the science data. We will present the SCUBA software which provides a visualization interface for quality control to all data taken at Paranal.
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