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Hi everybody. I worked for nearly 50 years on the development of a large variety of astrophysical spectrographic instruments. My goal here is to contribute to relevant Wikipedia articles.
Starting with the "Long-slit spectroscopy" article: looks too much centered on getting velocity profiles as opposed to gathering physical data. There is more to say about its advantages (and disadvantages too). An historical perspective is lacking, as well as long-slit spectroscopy current status w.r.t. its competitors, namely multi-object and integral field spectroscopy.
