6dFGS gJ053940.8-484052
Observation
| Spectrum ID | 501443698_sp1 |
|---|---|
| Alt name | g0539408-484052 |
| z | 0.0637 |
| RA, Dec | 84.9201, -48.6810 |
| MJD | 60266.66 |
| SNR/Å B/R | 13.4/19.7 |
| Obs Airmass | 1.05 |
| SMSS ID | 501443698 |
| Closest SMSS | None (< 15") |
| SMSS Mean r6"ap | 16.7 ± 0.1 |
| 2MASS Kext | 13.0 ± 0.1 |
AGN Properties
| Spectrum Type | Sy 1.5 |
|---|---|
| Quality Flag | good |
| AGN reference | 6dFGS |
| MW E(B−V) | 0.047 |
| Power law αν | 0.28 ± 0.12 |
| log L5100,AGN | 43.50 ± 0.02 |
| log HβBr/[O III] | -0.03 ± 0.03 |
| log ML5100/M☉ | 6.97 ± 0.04 |
| log MHα/M☉ | 6.52 ± 0.05 |
| log MHβ/M☉ | 6.76 ± 0.06 |
| log M[O III]/M☉ | 6.91 ± 0.05 |
Spatial extraction & sky subtraction region
Spaxel scale: 1 arcsec² — Flux units: erg s⁻¹ cm⁻² Å⁻¹
Apertures: object (solid), background (dashed)
Spectrum decomposition
Emission line measurements
| Line | log L (erg s⁻¹) | FWHM (km s⁻¹) | σ (km s⁻¹) | EW (Å) |
|---|---|---|---|---|
| Hγ Narrow | 40.21 ± 0.11 | 248 ± 62 | 139 ± 25 | 1.79 ± 0.24 |
| Hγ Broad | 40.70 ± 0.07 | 1243 ± 82 | 436 ± 30 | 5.28 ± 0.49 |
| [O III] 4364 | 39.80 ± 0.20 | 247 ± 62 | 103 ± 25 | 0.70 ± 0.20 |
| He II Narrow | 39.75 ± 0.20 | 247 ± 62 | 103 ± 25 | 0.74 ± 0.20 |
| He II Broad | 41.06 ± 0.05 | 4760 ± 72 | 2021 ± 29 | 15.20 ± 0.93 |
| Hβ Narrow | 40.78 ± 0.03 | 248 ± 62 | 139 ± 25 | 8.61 ± 0.28 |
| Hβ Broad | 41.22 ± 0.03 | 1377 ± 67 | 706 ± 55 | 23.69 ± 0.82 |
| [O III] 5007 | 41.25 ± 0.01 | 248 ± 62 | 139 ± 25 | 27.00 ± 0.29 |
| He I Narrow | 39.60 ± 0.20 | 247 ± 62 | 103 ± 25 | 0.88 ± 0.20 |
| He I Broad | 40.53 ± 0.06 | 1514 ± 78 | 643 ± 32 | 7.42 ± 0.60 |
| [O I] 6300 | 39.96 ± 0.07 | 247 ± 62 | 103 ± 25 | 2.35 ± 0.22 |
| Hα Narrow | 41.30 ± 0.01 | 247 ± 62 | 103 ± 25 | 56.63 ± 0.38 |
| Hα Broad | 41.70 ± 0.01 | 1254 ± 63 | 534 ± 25 | 142.56 ± 1.12 |
| [N II] 6585 | 40.86 ± 0.01 | 247 ± 62 | 103 ± 25 | 20.85 ± 0.31 |
| [S II] 6718 | 40.61 ± 0.02 | 247 ± 62 | 103 ± 25 | 12.35 ± 0.28 |
| [S II] 6732 | 40.45 ± 0.02 | 247 ± 62 | 103 ± 25 | 8.47 ± 0.30 |
All narrow line widths are tied to narrow [O III] 5007Å. [O III] 5007Å and narrow Hβ include a second narrow component not tied to other narrow lines.
Emission summary
| Hα Broad SNR | 19.01 |
|---|---|
| Hβ Broad SNR | 7.18 |
| Hγ Broad SNR | 3.20 |
| AGN frac | 0.70 |
| Host frac | 0.30 |
| log L5100,Host | 43.14 |
| Fe II/Hβ | 0.75 |
| Fe II/[O III] | 0.70 |
Quality flags
spurious_hab/hbb | 0.0/0 |
|---|---|
l5100 | 0 |
balmer | 0 |
balmer_snr | 0 |
hb_width | 1 |
balmer_width | 0 |
Hα mass estimates from Cho+2023. Remaining mass estimates from R–L relations in Wang & Woo 2024 and zero-points from Amrutha+2026.