Spectrum quality

This campaign is aimed at observers with a spectrograph with a resolution equal or higher than R=10000 (Lhires III 2400 t/mm, Star'Ex HR, eShel...). Quality observations, perfectly exploitable, can be obtained as soon as you have an observing instrument whose diameter is equal or superior to 60 mm (refractor, telescopes, etc). The targeted spectral region is centered on the Halpha line of hydrogen. The spectra sent must be calibrated, but you do not have to correct the radial velocity of the object (the proper radial velocity of the object and the topocentric velocity of the observer, i.e. the component related to the orbital velocity of the Earth around the Sun essentially).

If possible, the Signal to Noise ratio should be at least 150 in the continuum.