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Table 1
Comparison of fluxes of the strongest nebular lines.
| λ [Å ] | Ion | ESO 1.52 ma | ESO 1.52 mb | VLT | SAAO 1.9 m | SALT |
| 1984-04-30 | 2001-07-01 | 2005-04-20 | 2012-05-07 | 2012-05-29 | ||
| JD 2 445 820 | JD 2 452 091 | JD 2 453 480 | JD 2 456 054 | JD 2 456 076 | ||
|
|
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| 4861 | H i | 100.0 ± 5.0 | 100.0 ± 2.7 | 100.0 ± 1.0 | 100.0 ± 10.0 | 100.0 ± 5.0 |
| 4959 | [O iii] | − | 1.6 ± 0.2 | 1.8 ± 0.1 | 2.6 ± 0.3 | 2.4 ± 0.3 |
| 5007 | [O iii] | − | 5.1 ± 0.4 | 5.5 ± 0.1 | 7.8 ± 0.8 | 7.9 ± 0.4 |
| 5754 | [N ii] | 3.0 ± 1.0 | 4.1 ± 0.4 | 4.1 ± 0.1 | 4.1 ± 0.5 | 4.2 ± 0.3 |
| 5875 | He i | 4.0 ± 1.0 | 2.1 ± 0.2 | 2.8 ± 0.1 | 2.9 ± 0.3 | 2.9 ± 0.2 |
| 6300 | [O i] | 5.0 ± 1.0 | 3.5 ± 0.3 | 3.4 ± 0.1 | 3.7 ± 0.4 | 3.4 ± 0.2 |
| 6312 | [S iii] | − | 1.3 ± 0.2 | 1.4 ± 0.1 | 2.0 ± 0.2 | 1.5 ± 0.1 |
| 6364 | [O i] | 2.2 ± 0.7 | 1.1 ± 0.2 | 1.1 ± 0.1 | 1.1 ± 0.2 | 1.1 ± 0.1 |
| 6548 | [N ii] | 77.0 ± 4.0 | 59.6 ± 1.9 | 57.8 ± 0.6 | 61.8 ± 6.2 | 62.9 ± 3.2 |
| 6563 | H i | 581.0 ± 30.0 | 498.9 ± 7.7 | 509.0 ± 5.0 | 493.0 ± 50.0 | 493.0 ± 25.0 |
| 6584 | [N ii] | 213.0 ± 11.0 | 183.8 ± 4.0 | 190.0 ± 2.0 | 179.0 ± 18.0 | 186.0 ± 10.0 |
| 6678 | He i | − | 0.5 ± 0.1 | 1.4 ± 0.2 | 0.8 ± 0.1 | |
| 6716 | [S ii] | 4.0 ± 1.0 | 4.2 ± 0.4 | 4.2 ± 0.5 | 3.6 ± 0.4 | |
| 6731 | [S ii] | 10.0 ± 1.0 | 9.0 ± 0.6 | 8.0 ± 0.8 | 8.1 ± 0.5 | |
| 7002 | [O i] | − | 0.9 ± 0.2 c | 0.9 ± 0.1 | 0.7 ± 0.1 | |
| 7065 | He i | − | 1.1 ± 0.2 | 1.9 ± 0.2 | 1.9 ± 0.1 | |
| 7135 | [Ar iii] | − | 1.6 ± 0.2 | 2.1 ± 0.3 | 2.3 ± 0.2 | |
| 7320 | [O ii] | } 80.0 ± 4.0 | 35.8 ± 1.5 | 44.8 ± 2.3 | 49.8 ± 2.5 | |
| 7330 | [O ii] | 41.2 ± 1.8 | 39.5 ± 2.0 | 40.4 ± 2.1 | ||
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