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Table 1
Summary of all available atmospheric parameters of PG 1336−018 derived from spectroscopy.
| Spectrum | Type of model | Teff (K) | log g | log N(He)/N(H) | Reference |
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| SAAO1 | LTE, H | 33 139 ± 1000 | 5.78 ± 0.10 | ... | Kilkenny et al. (1998) |
| SAAO2 | LTE, H | 32 895 ± 1000 | 5.67 ± 0.10 | ... | Kilkenny et al. (1998) |
| VLT/UVES | LTE, H, He | 31 300 ± 250 | 5.60 ± 0.05 | −2.93 ± 0.05 | Vucković et al. (2007) |
| PB6 | NLTE, H, He | 33 220 ± 170 | 5.75 ± 0.04 | −3.11 ± 0.25 | Charpinet et al. (2008) |
| BG9 | NLTE, H, He | 32 380 ± 150 | 5.77 ± 0.03 | −2.87 ± 0.17 | Charpinet et al. (2008) |
| Bok6 | NLTE, H, He | 32 874 ± 148 | 5.705 ± 0.028 | −3.066 ± 0.250 | This work |
| Bok6 | NLTE, H, He, metals | 33 285 ± 169 | 5.707 ± 0.028 | −3.016 ± 0.216 | This work |
| Bok9 | LTE, H, He | 31 959 ± 71 | 5.823 ± 0.018 | −2.847 ± 0.101 | This work |
| Bok9 | NLTE, H, He | 32 359 ± 84 | 5.793 ± 0.017 | −2.879 ± 0.095 | This work |
| Bok9 | NLTE, H, He, metals | 32 649 ± 97 | 5.794 ± 0.017 | −2.892 ± 0.098 | This work |
| Bok9H | NLTE, H, He, metals | 32 608 ± 104 | 5.798 ± 0.018 | −2.839 ± 0.098 | This work |
| Bok9L | NLTE, H, He, metals | 32 748 ± 111 | 5.800 ± 0.020 | −2.893 ± 0.113 | This work |
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| Former adopted value | NLTE, H, He | 32 780 ± 200 | 5.76 ± 0.03 | −2.94 ± 0.14 | Charpinet et al. (2008) |
| New adopted value | NLTE, H, He, metals | 32 807 ± 82 | 5.771 ± 0.015 | −2.918 ± 0.089 | This work |
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