6dFGS gJ205139.5-175306
Observation
| Spectrum ID | 298260629_sp1 |
|---|---|
| Alt name | g2051395-175306 |
| z | 0.0876 |
| RA, Dec | 312.9146, -17.8849 |
| MJD | 60083.74 |
| SNR/Å B/R | 5.5/8.8 |
| Obs Airmass | 1.09 |
| SMSS ID | 298260629 |
| Closest SMSS | None (< 15") |
| SMSS Mean r6"ap | 17.9 ± 0.1 |
| 2MASS Kext | nan ± nan |
AGN Properties
| Spectrum Type | Sy 1.8+ |
|---|---|
| Quality Flag | good |
| AGN reference | 6dFGS |
| MW E(B−V) | 0.052 |
| Power law αν | -1.95 ± 0.06 |
| log L5100,AGN | 42.11 ± 0.34 |
| log HβBr/[O III] | <-0.51 |
| log ML5100/M☉ | — |
| log MHα/M☉ | 6.64 ± 0.11 |
| log MHβ/M☉ | — |
| log M[O III]/M☉ | — |
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 | 39.72 ± 0.28 | 358 ± 63 | 291 ± 51 | 20.84 ± 14.50 |
| Hγ Broad | — | — | — | — |
| [O III] 4364 | 39.57 ± 0.33 | 347 ± 62 | 147 ± 25 | 14.78 ± 7.22 |
| He II Narrow | — | — | — | — |
| He II Broad | — | — | — | — |
| Hβ Narrow | 40.11 ± 0.14 | 358 ± 63 | 291 ± 51 | 50.73 ± 13.33 |
| Hβ Broad | <40.48 | — | — | — |
| [O III] 5007 | 40.98 ± 0.03 | 358 ± 63 | 291 ± 51 | 384.62 ± 15.14 |
| He I Narrow | 39.20 ± 0.49 | 347 ± 62 | 147 ± 25 | 6.44 ± 6.17 |
| He I Broad | — | — | — | — |
| [O I] 6300 | 39.98 ± 0.09 | 347 ± 62 | 147 ± 25 | 38.53 ± 6.25 |
| Hα Narrow | 40.46 ± 0.05 | 347 ± 62 | 147 ± 25 | 116.90 ± 5.64 |
| Hα Broad | 41.30 ± 0.03 | 1916 ± 214 | 1315 ± 39 | 797.94 ± 24.18 |
| [N II] 6585 | 40.46 ± 0.04 | 347 ± 62 | 147 ± 25 | 117.40 ± 5.97 |
| [S II] 6718 | 40.11 ± 0.10 | 347 ± 62 | 147 ± 25 | 51.75 ± 8.01 |
| [S II] 6732 | 39.76 ± 0.20 | 347 ± 62 | 147 ± 25 | 23.26 ± 7.70 |
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 | 4.01 |
|---|---|
| Hβ Broad SNR | 0.92 |
| Hγ Broad SNR | 0.00 |
| AGN frac | 0.07 |
| Host frac | 0.93 |
| log L5100,Host | 43.24 |
| Fe II/Hβ | — |
| Fe II/[O III] | 0.26 |
Quality flags
spurious_hab/hbb | 0.0/0 |
|---|---|
l5100 | 2 |
balmer | 2 |
balmer_snr | 2 |
hb_width | 2 |
balmer_width | 2 |
Hα mass estimates from Cho+2023. Remaining mass estimates from R–L relations in Wang & Woo 2024 and zero-points from Amrutha+2026.