Table 3.

Derived [Cl iii] electron temperatures and densities

Object	(Te, log Ne)			(Te, log Ne)other	Ref.*
	(R1, R2)	(R1, R3)	(R1, R4)
NGC 2440	—	I, 3.4	—	11,750, 3.7	22
NGC 6537	7,500, 4.2	—	—	9,200, 4.3	24
NGC 6572†	10,000, 4.2	14,000, 4.3	11,000, 4.2	11,000, 4.2	25
NGC 6572‡	12,500, 4.2	I, 4.2	14,000, 4.2	11,000, 4.2	25
NGC 6741	12,000, 3.8	—	I, 3.8	11,750, 3.7	26
NGC 6884	I 3.9	—	—	11,750, 4.1	21
NGC 7009	I, 3.6	—	I, 3.6	11,500, 3.6	27
NGC 7027	12,500, 4.9	13,500, 4.9	11,000, 4.9	14,000, 4.8	14
NGC 7662	—	—	I, 3.5	12,000, 3.7	28
IC 2165	—	I, 3.4	I, 3.4	9,750, 3.6	15
IC 4997†	I, 4.3	I, 4.3	I, 4.3	10,000, 4.2	29
IC 4997‡	I, 4.1	I, 4.1	I, 4.1	10,000, 4.2	29
Hubble 12	I, 4.3	I, 4.3	I, 4.3	12,500, 4.4	30

T_e values are in K, N_e values are in cm⁻³. I indicates that T_e was indeterminate due to the observed R₂, R₃, or R₄ line ratio lying outside the range of values given in Fig. 1 or 2. In these instances, log N_e was deduced from R₁ by adopting T_e = 10,000 K. 

*References for sources of (T_e, log N_e)_other. 

^†Observations taken in 1990. 

^‡Observations taken in 1991.