craftutils.observation.epoch.XShooterSpectroscopyEpoch.grisms = {'nir': {'lambda_max': <Quantity 2500. nm>, 'lambda_min': <Quantity 1000. nm>}, 'uvb': {'lambda_max': <Quantity 550. nm>, 'lambda_min': <Quantity 300. nm>}, 'vis': {'lambda_max': <Quantity 1000. nm>, 'lambda_min': <Quantity 550. nm>}}