Spectroscopic Measurements in Photoionized Plasma
	1. Outflow velocities, mass loss (wavelengths) 2. Electron temperatures (RRCs) 3. Optical depth => column densities via absorption (oscillator strengths) and emission 4. Elemental abundances (column density behavior as a function of ionization parameter x = L/ner2) 5. Ionization balance (x), density (ne) and position (r) (photo-ionization and recombination rates, including autoionization processes)    Note: C 2  is not a measurable astrophysical quantity!
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