LEDA 184871
Observation
| Spectrum ID | 168849270_sp1 |
|---|---|
| Alt name | g1501395-072241 |
| z | 0.0230 |
| RA, Dec | 225.4147, -7.3779 |
| MJD | 60377.77 |
| SNR/Å B/R | 22.2/36.7 |
| Obs Airmass | 1.10 |
| SMSS ID | 168849270 |
| Closest SMSS | 1.78'', 2254787804 |
| SMSS Mean r6"ap | 15.9 ± 0.0 |
| 2MASS Kext | 11.5 ± 0.1 |
AGN Properties
| Spectrum Type | Sy 1.5 |
|---|---|
| Quality Flag | good |
| AGN reference | 6dFGS |
| MW E(B−V) | 0.079 |
| Power law αν | -1.96 ± 0.04 |
| log L5100,AGN | 42.11 ± 0.05 |
| log HβBr/[O III] | 0.14 ± 0.05 |
| log ML5100/M☉ | 7.47 ± 0.05 |
| log MHα/M☉ | 7.33 ± 0.05 |
| log MHβ/M☉ | 7.36 ± 0.07 |
| log M[O III]/M☉ | 7.38 ± 0.07 |
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 | 38.97 ± 0.17 | 242 ± 63 | 150 ± 27 | 3.66 ± 1.09 |
| Hγ Broad | — | — | — | — |
| [O III] 4364 | — | — | — | — |
| He II Narrow | — | — | — | — |
| He II Broad | — | — | — | — |
| Hβ Narrow | 39.17 ± 0.09 | 242 ± 63 | 150 ± 27 | 5.96 ± 0.89 |
| Hβ Broad | 40.09 ± 0.05 | 4907 ± 120 | 1841 ± 25 | 49.16 ± 2.78 |
| [O III] 5007 | 39.95 ± 0.02 | 242 ± 63 | 150 ± 27 | 35.90 ± 0.87 |
| He I Narrow | 38.17 ± 0.42 | 220 ± 63 | 91 ± 25 | 0.59 ± 0.43 |
| He I Broad | 40.36 ± 0.04 | 13871 ± 63 | 5890 ± 25 | 92.94 ± 4.56 |
| [O I] 6300 | 38.68 ± 0.17 | 220 ± 63 | 91 ± 25 | 1.92 ± 0.46 |
| Hα Narrow | 39.56 ± 0.03 | 220 ± 63 | 91 ± 25 | 14.79 ± 0.46 |
| Hα Broad | 40.88 ± 0.01 | 5693 ± 67 | 2121 ± 25 | 305.80 ± 2.55 |
| [N II] 6585 | 39.64 ± 0.02 | 220 ± 63 | 91 ± 25 | 17.58 ± 0.48 |
| [S II] 6718 | 39.33 ± 0.05 | 220 ± 63 | 91 ± 25 | 8.56 ± 0.61 |
| [S II] 6732 | 39.32 ± 0.05 | 220 ± 63 | 91 ± 25 | 8.39 ± 0.61 |
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 | 6.66 |
|---|---|
| Hβ Broad SNR | 1.73 |
| Hγ Broad SNR | 0.40 |
| AGN frac | 0.14 |
| Host frac | 0.86 |
| log L5100,Host | 42.88 |
| Fe II/Hβ | 0.38 |
| Fe II/[O III] | 0.52 |
Quality flags
spurious_hab/hbb | 0.0/0 |
|---|---|
l5100 | 2 |
balmer | 1 |
balmer_snr | 2 |
hb_width | 0 |
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.