Table 4: List of the most prominent n=3 to n=2 transitions. The columns indicate: (1) the observed wavelength; (2) transition; (3) the line ratio of observation using the high-energy grating on Chandra (Desai et al. 2005); (4, 5) the n=4 R-matrix results for and 6.8 respectively; (6) ratio of poulation of upper level due to radiative cascade to the population due to direct excitation for the n=4 R-matrix calculation; (7-9) the same as Cols. (4-6) but for the n=3 R-matrix calculation; (10, 11) APEC (version 1.10) intensities for ; (12) Desai et al. (2005) using an emission measure distribution peaked at ; (13) intensity ratios calculated using the distorted wave collision strengths of Sampson et al. (1991). Note: the 16.076 Å feature was measured by both a high-energy grating (HEG) and a medium-energy grating (MEG) which gave different results; the value in parentheses is from the MEG.

(Å)	Trans.	Iobs	I(n=4)	C(n=4)	I(n=3)	C(n=3)	I(APEC (Desai))	I(DW n=3)
14.208	56-1 (3d-2p)		0.64-0.64	0.01	0.65-0.65	<0.01	0.65-0.65 (0.65)	0.65-0.65
14.208	55-1 (3d-2p)	1.0	0.36-0.36	0.01	0.35-0.35	<0.01	0.35-0.35 (0.35)	0.35-0.35
14.261	53-1 (3d-2p)		0.15-0.15	0.02	0.14-0.14	<0.01	0.13-0.13 (0.13)	0.12-0.12
14.261	52-1 (3d-2p)	0.30	0.06-0.06	0.12	0.05-0.05	0.07	0.06-0.06 (0.08)	0.06-0.05
14.376	49-1 (3d-2p)	0.39	0.27-0.26	0.04	0.25-0.24	0.02	0.26-0.25 (0.26)	0.24-0.23
14.539	41-1 (3d-2p)	0.28	0.21-0.20	0.12	0.18-0.17	0.07	0.19-0.19 (0.19)	0.18-0.18
15.628	9-1 (3s-2p)	0.31	0.44-0.34	3.2	0.32-0.24	2.5	0.26-0.25 (0.27)	0.17-0.16
15.870	7-1 (3s-2p)	0.21	0.31-0.23	2.9	0.22-0.16	2.4	0.16-0.15 (0.17)	0.11-0.10
15.870	10-2 (3s-2p)	0.24 (bl)	0.18-0.13	2.9	0.12-0.08	2.2	0.08-0.08 (0.09)	0.05-0.04
16.008	5-1 (3s-2p)	0.58 (bl)	0.50-0.38	3.6	0.36-0.27	2.8	0.30-0.28 (0.71?)	0.20-0.17
16.076	4-1 (3s-2p)	0.71(0.59)	0.83-0.60	6.5	0.60-0.42	5.0	0.40-0.34 (0.39)	0.32-0.25