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Table 1:

Best-fit parameters for the transitions identified in the soft X-ray spectrum of NGC 4051.
Line ID $\lambda_{\rm exp} ({\rm {\AA}})$ $\lambda_{\rm obs} ({\rm {\AA}})$ $v~({\rm km s^{-1}})$ Flux ( $\times 10^{-14}$ cgs) $\Delta {C}$
Ne X Ly-$\alpha $   12.134  $12.13_{\rm -0.13}^{+0.03}$  $-23_{\rm -3100}^{+ 800}$   $1.5_{\rm -1.4}^{+1.6}$  3
Ne IX (r)   13.447  $13.45_{\rm -0.02}^{+0.02}$  $-7_{\rm - 360}^{+ 400}$   $\la$0.81   -
Ne IX (i)   13.550  $13.55_{\rm -0.02}^{+0.02}$  $23_{\rm - 360}^{+ 400}$   $\la$0.77   -
Ne IX (f)   13.700  $13.70_{\rm -0.02}^{+0.02}$  $-40_{\rm - 360}^{+ 400}$   $4.7_{\rm -1.2}^{+1.3}$  50
Fe XVII 3s-2p   17.073  $17.06_{\rm -0.02}^{+0.04}$  $-135_{\rm - 380}^{+ 710}$  $3.3_{\rm -1.5}^{+1.4}$  21
O VIII Ly-$\alpha $   18.969  $18.98_{\rm -0.02}^{+0.01}$  $150_{\rm - 310}^{+ 190}$   $7.0_{\rm -1.1}^{+1.2}$  135
O VII (r)   21.600  $21.58_{\rm -0.01}^{+0.01}$  $-202_{\rm -210}^{+ 150}$   $\la$0.80  -
O VII (i)   21.790  $21.80_{\rm -0.20}^{+0.25}$  $194_{\rm -2380}^{+3400}$   $7.2_{\rm -1.6}^{+1.7}$  74
O VII (f)   22.101  $22.10_{\rm -0.02}^{+0.03}$  $32_{\rm -250}^{+ 400}$   $15.0_{\rm -1.9}^{+2.1}$  238
N VII Ly-$\alpha $   24.781  $24.79_{\rm -0.02}^{+0.03}$  $198_{\rm -220}^{+ 330}$   $2.0_{\rm -0.8}^{+0.9}$   17
N VI (r)   28.787  $28.78_{\rm -0.01}^{+0.02}$  $-104_{\rm -150}^{+220}$   $\la$0.92   -
N VI (i)   29.083  $29.07_{\rm -0.01}^{+0.02}$  $-94_{\rm -150}^{+220}$   $1.3_{\rm -0.6}^{+0.5}$   6
N VI (f)   29.534  $29.52_{\rm -0.01}^{+0.02}$  $-103_{\rm -150}^{+220}$   $3.6_{\rm -0.8}^{+0.7}$   38
C VI Ly-$\alpha $   33.736  $33.76_{\rm -0.02}^{+0.03}$  $233_{\rm -140}^{+ 240}$   $3.5_{\rm -1.1}^{+1.3}$   29

Notes. From left to right we give the name of the detected ion transition, the expected centroid wavelength (Å) in the rest-frame as extracted from the CHIANTI database (Dere et al. 2001), the observed wavelength (Å), the corresponding shift in velocity (km s-1), the line flux (in units of 10-14 erg s-1 cm-2) and the associated difference in C-statistics, i.e. $\Delta {C}$. All lines that were not identified ( $\Delta C < 2.3$) but are part of triplet features are also reported.


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