Table 1
Line ratios used for the EIS calibration.
| Line ratio (Å) | Predicted | MH73 | Observed | Reff | Reff | Det. | ||||
| (log Ne = 8–9) | DN/s | Pres. | Ground | |||||||
|
|
||||||||||
| Fe viii 185.2/196.0 | 4.5–5.3 (5.3, 20%) | 1.23 (0.10, 1.3/1.1) | 0.206 | 0.256 | SW | |||||
| Fe ix 189.94/197.85 | 0.78–1.0 (1.0, 30%) | 0.68 (0.04, 1.6/2.4) | 0.653 | 0.704 | SW | |||||
| Fe x 174.5/184.5 | 4.52–4.32 (4.4, 10%) | 4.53(2%) | 0.10 (0.01, 0.3/3.4) | 0.021 | 0.024 | SW | ||||
| Fe x 177.2/184.5 | 2.6–2.49 (2.55, 10%) | 2.53(0%) | 0.16 (0.01, 0.5/3.4) | 0.060 | 0.074 | SW | ||||
| Fe x 184.5/190.0 (bl) | 2.94 (30%) | (bl) | 0.92 (0.05, 3.4/3.7) | 0.304 | 0.332 | BR SW | ||||
| Fe x 207.4/184.5 | 0.14–0.18 (0.15, 30%) | 0.05 (0.01, 0.2/3.4) | 0.375 | 0.321 | SW | |||||
| Fe x 257.3 (sbl)/184.5 | 1.52–1.12 | 0.77 (0.08, 7.5/9.8) | 0.706 | 0.928 | LW/SW | |||||
| Fe xi 188.2/192.8 (bl) | 4.8 | 2.1 (0.1, 42.5/20) | 0.427 | 0.559 | BR SW | |||||
| Fe xi 202.7/188.3 | 0.1 (30%) | 0.06 (0.01, 0.4/7.0) | 0.648 | 0.422 | BR SW | |||||
| Fe xi 178.1/182.2 | 0.27 | 0.07 (0.01, 0.4/5.5) | 0.254 | 0.231 | BR SW | |||||
| Fe xi 180.4/188.2 | 2.0 (20%) | 0.34 (0.01, 2.4/7.0) | 0.105 | 0.114 | SW | |||||
| Fe xi 257.5 (sbl)/188.2 | 0.165 | 0.05 (0.006, 2.1/42.5) | 0.411 | 0.413 | LW/SW | |||||
| Fe xii 192.4/195.1 (sbl) | 0.315 | 0.315(0%) | 0.24 (0.01, 5.7/23.4) | 0.751 | 0.844 | SW | ||||
| Fe xii 193.5/195.1 (sbl) | 0.67 | 0.67(0%) | 0.59 (0.01, 13.9/23.4) | 0.873 | 0.924 | SW | ||||
| Fe xii 186.9 (sbl)/196.6 (bl) | 3.45–3.7 (3.5, 20%) | 1.04 (0.11, 1.5/1.5) | 0.282 | 0.381 | SW | |||||
| Fe xiii 209.9 (bl)/202.0 | 0.15 (10%) | 0.025(0.005, 1.9/76.8) | 0.169 | 0.159 | BR SW | |||||
| Fe xiii 204.9 (bl)/201.1 (bl) | 0.31 (30%) | 0.27(-13%) | 0.088 (0.01, 2.2/24.7) | 0.289 | 0.278 | BR SW | ||||
| Fe xiii 201.1 (bl)/197.4 | 5.0 (30%) | 6.2(+24%) | 2.65 (0.5, 24.8/9.3) | 0.540 | 0.416 | BR SW | ||||
| Fe xiii 204.9 (bl)/197.4 | 1.55 (30%) | 1.7(+10%) | 0.23 (0.04, 2.2/9.3) | 0.154 | 0.115 | BR SW | ||||
| Fe xiii 200.0/196.5 (bl) | 3.17–3.28 (3.3, 20%) | 3.3(0%) | 1.66 (0.3, 13.1/7.8) | 0.512 | 0.576 | SW | ||||
| Fe xiii 209.6/200. | 0.74–0.685 (0.68, 20%) | 0.05 (0.01, 1.7/32.4) | 0.072 | 0.081 | SW | |||||
| Fe xiii 246.2/251.9 | 0.51 (10%) | 0.59(17%) | 0.34 (0.01, 2.9/8.4) | 0.651 | 0.635 | BR LW | ||||
| Fe xiii 251.9/201.1 (bl) | 1.3(20%) | LW/SW | ||||||||
| Fe xiii 251.9/204.9 | 4.2–4.8 | 2.73 (42.6/15.6) | 0.700 | 1.164 | LW/SW | |||||
| Fe xiv 252.2/264.8 | 0.23 (10%) | 0.25 | 0.08 (0.01, 3.7/44.5) | 0.331 | 0.421 | BR LW | ||||
| Fe xiv 257.4/270.5 | 0.68 (10%) | 0.32 (0.02, 7.9/25.7) | 0.448 | 0.541 | BR LW | |||||
| Fe xiv 289.1/274.2 | 0.065 (20%) | 0.065 (0%) | 0.013 (0.002, 0.6/47.7) | 0.211 | 0.232 | BR LW | ||||
| Fe xiv 274.2/211.3 | 0.69 (10%) | 0.77 (10%) | 4.9(0.4, 233/47.5) | 9.225 | 9.636 | LW/SW | ||||
| Fe xiv 270.5/(264.7+274.2) | 0.26 (20%) | 0.26 (0%) | LW | |||||||
| Fe xvi 251/263 | 0.57 (20%) | 0.66 (16%) | 0.23 (0.02, 3.9/16.6) | 0.388 | 0.408 | LW | ||||
| Fe xvii 254.9/204.7 | 1/0.93 (10%) | 0.64(0.06, 5.6/8.7) | 0.744 | 1.448 | BR LW/SW | |||||
| Fe xxiv 255.1/192 | 1/1.85 (10%) | 0.067(0.007, 3.5/52) | 0.166 | 0.207 | LW/SW | |||||
| Si vii 275.7/272.6 | 0.58 (10%) | 0.46 (0.07, 0.1/0.3) | 0.805 | 0.865 | BR LW | |||||
| Si vii 275.4/272.6 | 4.2–3.45 | LW | ||||||||
| Si x 253.8/258.4 | 0.19 (10%) | 0.18(5%) | 0.13 (0.01, 0.2/1.3) | 0.658 | 0.709 | BR LW | ||||
| Si x 277.2/272. | 0.84 (10%) | 0.87(2%) | 0.53 (0.02, 0.6/1.2) | 0.646 | 0.758 | BR LW | ||||
| Si x 261.1/277.2 | 1.37–1.35 (10%) | 1.36(0%) | 1.41 (0.08, 0.9/0.6) | 0.969 | 0.926 | LW | ||||
| S x 257.1 (bl)/264.2 | 0.348 (10%) | 0.24 (0.03, 0.2/0.9) | BR LW | |||||||
| S xi 285.6 (sbl)/281.4 | 0.496 (10%) | 0.31 (0.05, 0.3/1.1) | 0.634 | 0.635 | BR LW | |||||
| Si vii 275.4/Fe viii 185.2 | 0.63 | 0.61(0.06, 2.6/4.3) | 1.432 | 1.217 | LW/SW | |||||
Notes.The second column shows the theoretical ratios (photon units) within the log Ne [cm-3] = 8–9 range, and optionally the chosen value with an estimated uncertainty. The third column indicates the observed ratios from Malinovsky & Heroux (1973), and in brackets the percentage difference with the predicted ratios. The following column indicates the EIS averaged ratio (in data numbers per second, DN/s), with its variation in brackets (1 sigma) and the averaged values of the two lines (in DN/s). The following two columns show the ratios of the effective areas Reff obtained with the present calibration and the ground calibration. The last column shows the channel, and whether the ratio is a branching ratio (BR).
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