LEDA 1057572
Observation
| Spectrum ID | 22272999_sp1 |
|---|---|
| Alt name | g0409291-042902 |
| z | 0.0389 |
| RA, Dec | 62.3715, -4.4841 |
| MJD | 60918.78 |
| SNR/Å B/R | 10.5/18.4 |
| Obs Airmass | 1.15 |
| SMSS ID | 22272999 |
| Closest SMSS | None (< 15") |
| SMSS Mean r6"ap | 16.8 ± 0.2 |
| 2MASS Kext | 13.1 ± 0.1 |
AGN Properties
| Spectrum Type | Sy 1.5 |
|---|---|
| Quality Flag | good |
| AGN reference | 6dFGS |
| MW E(B−V) | 0.075 |
| Power law αν | -0.36 ± 0.21 |
| log L5100,AGN | 42.74 ± 0.03 |
| log HβBr/[O III] | -0.08 ± 0.03 |
| log ML5100/M☉ | 7.10 ± 0.05 |
| log MHα/M☉ | 6.49 ± 0.05 |
| log MHβ/M☉ | 6.95 ± 0.06 |
| log M[O III]/M☉ | 7.11 ± 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 | 39.75 ± 0.08 | 244 ± 63 | 129 ± 25 | 3.94 ± 0.45 |
| Hγ Broad | 39.88 ± 0.16 | 1932 ± 225 | 623 ± 37 | 4.99 ± 1.07 |
| [O III] 4364 | 39.37 ± 0.15 | 212 ± 63 | 87 ± 25 | 1.67 ± 0.36 |
| He II Narrow | 39.36 ± 0.13 | 212 ± 63 | 87 ± 25 | 1.83 ± 0.35 |
| He II Broad | 40.35 ± 0.06 | 4344 ± 95 | 1845 ± 39 | 18.12 ± 1.58 |
| Hβ Narrow | 39.94 ± 0.05 | 244 ± 63 | 129 ± 25 | 7.26 ± 0.43 |
| Hβ Broad | 40.64 ± 0.02 | 2329 ± 94 | 792 ± 31 | 37.31 ± 1.09 |
| [O III] 5007 | 40.72 ± 0.01 | 244 ± 63 | 129 ± 25 | 46.45 ± 0.50 |
| He I Narrow | — | — | — | — |
| He I Broad | 39.60 ± 0.11 | 1266 ± 75 | 537 ± 30 | 4.60 ± 0.67 |
| [O I] 6300 | 39.30 ± 0.08 | 212 ± 63 | 87 ± 25 | 2.61 ± 0.30 |
| Hα Narrow | 40.35 ± 0.01 | 212 ± 63 | 87 ± 25 | 30.93 ± 0.41 |
| Hα Broad | 41.22 ± 0.01 | 1696 ± 68 | 726 ± 25 | 230.28 ± 1.37 |
| [N II] 6585 | 40.05 ± 0.02 | 212 ± 63 | 87 ± 25 | 15.66 ± 0.40 |
| [S II] 6718 | 39.72 ± 0.04 | 212 ± 63 | 87 ± 25 | 7.65 ± 0.37 |
| [S II] 6732 | 39.65 ± 0.03 | 212 ± 63 | 87 ± 25 | 6.53 ± 0.34 |
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 | 16.17 |
|---|---|
| Hβ Broad SNR | 4.87 |
| Hγ Broad SNR | 1.11 |
| AGN frac | 0.51 |
| Host frac | 0.49 |
| log L5100,Host | 42.73 |
| Fe II/Hβ | 1.45 |
| Fe II/[O III] | 1.22 |
Quality flags
spurious_hab/hbb | 0.0/0 |
|---|---|
l5100 | 0 |
balmer | 0 |
balmer_snr | 1 |
hb_width | 0 |
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.