Table A.2: Measured line counts for O VII and Ne IX intercombination (i) and forbidden (f) lines, corresponding f/i ratios (corrected for $A_{\rm eff}$), and plasma densities $n_{\rm e}$ derived from Eq. (2). All errors are 1$\sigma $ errors.
    O VII Ne IX
Star Instr. i [cts] f [cts] f/i log($n_{\rm e}$) i [cts] f [cts] f/i log($n_{\rm e}$)
24UMa MEG 2.55$\pm$1.97 14.52$\pm$4.00 6.37$\pm$5.22 <11.9 18.84$\pm$5.70 80.49$\pm$10.10 4.69$\pm$1.53 <11.8
  HEG - - - - 8.83$\pm$3.32 13.64$\pm$3.99 1.61$\pm$0.77 $11.8\,\pm\,0.42$
44Boo MEG 32.92$\pm$6.46 49.79$\pm$7.70 1.69$\pm$0.42 $10.6\,\pm\,0.19$ 132.90$\pm$15.01 352.56$\pm$25.21 2.91$\pm$0.39 $11.0\,\pm\,0.52$
  HEG - - - - 40.76$\pm$7.17 84.48$\pm$10.46 2.17$\pm$0.47 $11.5\,\pm\,0.27$
47Cas RGS1 55.19$\pm$12.64 105.41$\pm$14.67 2.00$\pm$0.54 $10.5\,\pm\,0.24$ - - - -
ABDor RGS1 230.94$\pm$24.70 407.50$\pm$27.21 1.83$\pm$0.23 $10.5\,\pm\,0.10$ - - - -
  MEG 15.60$\pm$5.02 36.98$\pm$6.75 2.65$\pm$0.98 $10.2\,\pm\,0.74$ 137.61$\pm$13.53 290.84$\pm$18.73 2.32$\pm$0.27 $11.4\,\pm\,0.16$
  HEG - - - - 33.50$\pm$6.11 77.68$\pm$9.19 2.42$\pm$0.53 $11.4\,\pm\,0.37$
$\alpha$CenA LETG 38.41$\pm$6.99 109.60$\pm$11.06 2.82$\pm$0.59 $10.1\,\pm\,0.39$ - - - -
$\alpha$CenB RGS1 20.34$\pm$6.49 111.23$\pm$11.60 5.68$\pm$1.91 <10.2 - - - -
  LETG 36.09$\pm$7.09 154.54$\pm$13.06 4.23$\pm$0.90 <10.8 - - - -
ADLeo RGS1 166.09$\pm$17.75 356.13$\pm$22.02 2.23$\pm$0.27 $10.4\,\pm\,0.12$ - - - -
  LETG 53.01$\pm$9.21 170.31$\pm$14.52 3.17$\pm$0.61 $9.92\,\pm\,0.74$ - - - -
  MEG 18.56$\pm$4.45 30.68$\pm$5.65 1.85$\pm$0.56 $10.5\,\pm\,0.25$ 53.71$\pm$7.85 171.40$\pm$14.05 3.50$\pm$0.59 <12.0
  HEG - - - - 12.77$\pm$3.61 26.91$\pm$5.26 2.20$\pm$0.76 $11.5\,\pm\,0.50$
Algol RGS1 104.99$\pm$25.25 90.89$\pm$24.58 0.90$\pm$0.33 $10.6\,\pm\,1.41$ - - - -
  LETG 186.85$\pm$22.27 184.01$\pm$22.30 0.97$\pm$0.17 $10.4\,\pm\,0.47$ - - - -
  MEG 51.46$\pm$8.54 31.58$\pm$7.29 0.69$\pm$0.19 $10.9\,\pm\,0.29$ 150.82$\pm$15.43 236.96$\pm$18.28 1.72$\pm$0.22 $11.7\,\pm\,0.11$
  HEG - - - - 35.73$\pm$6.99 53.05$\pm$8.12 1.55$\pm$0.39 $11.8\,\pm\,0.20$
ATMic RGS1 134.91$\pm$17.58 238.57$\pm$18.83 1.84$\pm$0.28 $10.5\,\pm\,0.12$ - - - -
AUMic RGS1 209.47$\pm$21.95 688.37$\pm$31.28 3.44$\pm$0.39 $9.70\,\pm\,0.67$ - - - -
  MEG 10.05$\pm$3.52 45.99$\pm$6.97 5.11$\pm$1.95 <10.9 78.25$\pm$9.95 214.19$\pm$15.80 3.00$\pm$0.44 $10.9\,\pm\,1.00$
  HEG - - - - 24.99$\pm$5.08 52.33$\pm$7.29 2.19$\pm$0.54 $11.5\,\pm\,0.32$
$\beta$Cet RGS1 19.48$\pm$8.40 79.44$\pm$11.74 4.23$\pm$1.93 <11.3 - - - -
  LETG 58.12$\pm$16.27 178.69$\pm$20.17 3.03$\pm$0.92 <11.0 - - - -
  MEG 5.49$\pm$3.00 23.61$\pm$5.25 4.80$\pm$2.83 <11.5 127.79$\pm$14.00 211.92$\pm$17.14 1.82$\pm$0.25 $11.7\,\pm\,0.12$
  HEG - - - - 32.41$\pm$6.07 64.72$\pm$8.30 2.09$\pm$0.47 $11.6\,\pm\,0.26$
Canopus MEG 1.20$\pm$1.41 13.42$\pm$3.87 12.47$\pm$15.09 - 23.29$\pm$5.74 42.20$\pm$7.13 1.99$\pm$0.59 $11.6\,\pm\,0.33$
  HEG - - - - 4.68$\pm$2.28 13.03$\pm$3.66 2.91$\pm$1.64 <12.0
$\chi^1$Ori RGS1 22.27$\pm$8.18 123.42$\pm$13.40 5.75$\pm$2.20 <10.5 - - - -
EKDra RGS1 30.25$\pm$8.06 59.68$\pm$9.82 2.05$\pm$0.64 $10.4\,\pm\,0.29$ - - - -
  LETG 23.82$\pm$7.19 31.03$\pm$7.53 1.29$\pm$0.50 $10.8\,\pm\,0.28$ - - - -
$\epsilon$Eri RGS1 41.69$\pm$8.90 160.21$\pm$14.34 3.99$\pm$0.92 <10.9 - - - -
  LETG 153.61$\pm$14.85 453.99$\pm$22.78 2.92$\pm$0.32 $10.0\,\pm\,0.20$ - - - -
EQPeg RGS1 46.25$\pm$9.95 142.72$\pm$13.99 3.20$\pm$0.76 <10.8 - - - -
ERVul MEG 4.14$\pm$3.03 18.06$\pm$5.05 4.88$\pm$3.83 <11.9 51.41$\pm$9.56 168.72$\pm$14.75 3.60$\pm$0.74 <12.1
  HEG - - - - 16.96$\pm$4.53 32.71$\pm$6.17 2.02$\pm$0.66 $11.6\,\pm\,0.37$
EVLac RGS1 128.92$\pm$16.34 291.00$\pm$20.31 2.34$\pm$0.34 $10.3\,\pm\,0.16$ - - - -
  MEG 40.31$\pm$6.59 54.92$\pm$7.58 1.52$\pm$0.33 $10.7\,\pm\,0.15$ 85.95$\pm$10.78 222.32$\pm$16.34 2.84$\pm$0.41 $11.1\,\pm\,0.48$
  HEG - - - - 24.32$\pm$5.20 68.82$\pm$8.55 2.96$\pm$0.73 <12.0
HD223460 MEG 10.64$\pm$3.89 7.37$\pm$3.36 0.77$\pm$0.45 $11.1\,\pm\,0.43$ - - - -
$\kappa$Cet RGS1 63.15$\pm$11.60 153.99$\pm$15.00 2.55$\pm$0.53 $10.2\,\pm\,0.28$ - - - -
$\mu$Vel MEG 4.26$\pm$2.96 27.60$\pm$5.73 7.24$\pm$5.24 <11.5 50.20$\pm$8.94 59.62$\pm$9.23 1.30$\pm$0.31 $11.9\,\pm\,0.17$
  HEG - - - - 24.12$\pm$5.49 31.65$\pm$5.93 1.37$\pm$0.40 $11.9\,\pm\,0.22$
$\pi^1$UMa RGS1 30.39$\pm$8.22 94.81$\pm$11.76 3.24$\pm$0.96 <10.8 - - - -
Procyon LETG 203.00$\pm$16.80 652.40$\pm$27.40 3.17$\pm$0.29 $9.90\,\pm\,0.25$ - - - -
ProxCen MEG 5.73$\pm$2.45 18.19$\pm$4.33 3.55$\pm$1.74 <10.5 5.54$\pm$2.89 18.02$\pm$5.03 3.57$\pm$2.11 <12.9
  HEG - - - - 2.93$\pm$1.73 12.81$\pm$4.92 4.57$\pm$3.22 <12.9
SpeedyMic MEG 3.75$\pm$2.22 8.56$\pm$3.14 2.55$\pm$1.77 <11.2 11.57$\pm$3.68 37.35$\pm$6.82 3.54$\pm$1.30 <12.5
  HEG - - - - 2.77$\pm$1.74 10.59$\pm$3.32 3.99$\pm$2.80 <13.0
V471Tau LETG 16.11$\pm$7.37 43.43$\pm$9.19 2.66$\pm$1.34 <11.2 - - - -
VWCep LETG 72.06$\pm$12.18 89.71$\pm$12.90 1.23$\pm$0.27 $10.8\,\pm\,0.15$ - - - -
$\xi$UMa MEG 39.15$\pm$6.40 72.85$\pm$8.65 2.08$\pm$0.42 $10.4\,\pm\,0.19$ 138.57$\pm$13.41 354.90$\pm$20.13 2.81$\pm$0.32 $11.1\,\pm\,0.31$
  HEG - - - - 29.59$\pm$5.73 81.17$\pm$9.20 2.87$\pm$0.64 <12.1
YYGem LETG 50.64$\pm$9.63 115.75$\pm$12.44 2.26$\pm$0.49 $10.4\,\pm\,0.23$ - - - -
YZCMi RGS1 88.70$\pm$13.07 169.54$\pm$15.80 2.00$\pm$0.35 $10.5\,\pm\,0.15$ - - - -


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