LEDA 731876
Observation
| Spectrum ID | 234271697_sp1 |
|---|---|
| Alt name | g2057477-291322 |
| z | 0.0294 |
| RA, Dec | 314.4487, -29.2229 |
| MJD | 60525.52 |
| SNR/Å B/R | 8.2/18.0 |
| Obs Airmass | 1.09 |
| SMSS ID | 234271697 |
| Closest SMSS | None (< 15") |
| SMSS Mean r6"ap | 16.3 ± 0.0 |
| 2MASS Kext | 12.4 ± 0.1 |
AGN Properties
| Spectrum Type | Sy 1.5+ |
|---|---|
| Quality Flag | good |
| AGN reference | 6dFGS |
| MW E(B−V) | 0.079 |
| Power law αν | -1.74 ± 0.21 |
| log L5100,AGN | 41.55 ± 0.35 |
| log HβBr/[O III] | <-0.11 |
| log ML5100/M☉ | — |
| log MHα/M☉ | 5.63 ± 0.08 |
| 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 | 39.14 ± 0.25 | — | 167 ± 25 | 19.45 ± 6.26 |
| Hγ Broad | — | — | — | — |
| [O III] 4364 | 38.78 ± 0.32 | 122 ± 62 | 50 ± 25 | 8.30 ± 4.46 |
| He II Narrow | 38.72 ± 0.37 | 122 ± 62 | 50 ± 25 | 7.34 ± 3.80 |
| He II Broad | 39.23 ± 0.37 | 1178 ± 62 | 500 ± 25 | 24.22 ± 12.49 |
| Hβ Narrow | 38.76 ± 0.38 | — | 167 ± 25 | 8.36 ± 4.27 |
| Hβ Broad | <39.68 | — | — | — |
| [O III] 5007 | 39.78 ± 0.09 | — | 167 ± 25 | 86.68 ± 4.87 |
| He I Narrow | 38.57 ± 0.35 | 122 ± 62 | 50 ± 25 | 5.57 ± 2.49 |
| He I Broad | 39.04 ± 0.32 | 1178 ± 62 | 500 ± 25 | 16.57 ± 7.41 |
| [O I] 6300 | 38.87 ± 0.22 | 122 ± 62 | 50 ± 25 | 11.44 ± 2.25 |
| Hα Narrow | 39.25 ± 0.08 | 122 ± 62 | 50 ± 25 | 27.50 ± 2.35 |
| Hα Broad | 40.33 ± 0.02 | 1178 ± 62 | 433 ± 25 | 332.16 ± 8.05 |
| [N II] 6585 | 39.36 ± 0.05 | 122 ± 62 | 50 ± 25 | 35.74 ± 2.76 |
| [S II] 6718 | 38.97 ± 0.16 | 122 ± 62 | 50 ± 25 | 14.61 ± 2.62 |
| [S II] 6732 | 38.88 ± 0.17 | 122 ± 62 | 50 ± 25 | 11.66 ± 2.56 |
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 | 3.88 |
|---|---|
| Hβ Broad SNR | 0.82 |
| Hγ Broad SNR | 0.00 |
| AGN frac | 0.05 |
| Host frac | 0.95 |
| log L5100,Host | 42.87 |
| Fe II/Hβ | — |
| Fe II/[O III] | 1.93 |
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.