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Column label: SLITWID

If DOMETYPE is 'DOME', this is the width of the shutter or slit opening, in meters.

Some domes are equipped with upper and lower windscreens that could, in principle, be used to shade the mirror from moonlight. In practice, these screens always move too slowly to be used routinely in photometric programs. Therefore, wind screens are ignored, even though they might occasionally be used in particular programs.

Petra Nass