LEDA 153910
Observation
| Spectrum ID | 78772924_sp1 |
|---|---|
| Alt name | g0922229-340343 |
| z | 0.0441 |
| RA, Dec | 140.5955, -34.0619 |
| MJD | 59731.38 |
| SNR/Å B/R | 8.3/21.0 |
| Obs Airmass | 1.15 |
| SMSS ID | 78772924 |
| Closest SMSS | 5.75'', 78772925 |
| SMSS Mean r6"ap | 16.5 ± 0.0 |
| 2MASS Kext | 12.0 ± 0.1 |
AGN Properties
| Spectrum Type | Sy 1.8 |
|---|---|
| Quality Flag | good |
| AGN reference | 6dFGS |
| MW E(B−V) | 0.196 |
| Power law αν | -1.97 ± 0.04 |
| log L5100,AGN | 42.59 ± 0.14 |
| log HβBr/[O III] | -0.58 ± 0.40 |
| log ML5100/M☉ | 6.93 ± 0.07 |
| log MHα/M☉ | 7.14 ± 0.03 |
| log MHβ/M☉ | 6.79 ± 0.19 |
| log M[O III]/M☉ | 7.18 ± 0.03 |
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 ± 0.22 | 301 ± 63 | 194 ± 46 | 7.35 ± 3.94 |
| Hγ Broad | — | — | — | — |
| [O III] 4364 | 39.60 ± 0.23 | 294 ± 62 | 125 ± 25 | 5.27 ± 1.92 |
| He II Narrow | 39.61 ± 0.25 | 294 ± 62 | 125 ± 25 | 5.37 ± 1.64 |
| He II Broad | — | — | — | — |
| Hβ Narrow | 40.05 ± 0.10 | 301 ± 63 | 194 ± 45 | 14.89 ± 3.16 |
| Hβ Broad | 40.50 +0.69−0.10 | 2071 ± 25 | 766 ± 25 | 41.71 ± 4.26 |
| [O III] 5007 | 41.08 ± 0.02 | 301 ± 63 | 194 ± 45 | 159.01 ± 3.32 |
| He I Narrow | 38.91 ± 0.47 | 294 ± 62 | 125 ± 25 | 1.09 ± 0.80 |
| He I Broad | 39.91 ± 0.14 | 1178 ± 62 | 500 ± 25 | 10.81 ± 1.67 |
| [O I] 6300 | 39.66 ± 0.10 | 294 ± 62 | 125 ± 25 | 6.11 ± 0.83 |
| Hα Narrow | 40.54 ± 0.02 | 294 ± 62 | 125 ± 25 | 46.77 ± 1.01 |
| Hα Broad | 41.53 ± 0.01 | 2890 ± 65 | 1276 ± 62 | 449.38 ± 4.90 |
| [N II] 6585 | 40.58 ± 0.02 | 294 ± 62 | 125 ± 25 | 51.23 ± 1.14 |
| [S II] 6718 | 39.95 ± 0.05 | 294 ± 62 | 125 ± 25 | 11.90 ± 1.00 |
| [S II] 6732 | 39.90 ± 0.06 | 294 ± 62 | 125 ± 25 | 10.63 ± 0.83 |
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 | 8.10 |
|---|---|
| Hβ Broad SNR | 1.59 |
| Hγ Broad SNR | 0.52 |
| AGN frac | 0.17 |
| Host frac | 0.83 |
| log L5100,Host | 43.27 |
| Fe II/Hβ | — |
| Fe II/[O III] | — |
Quality flags
spurious_hab/hbb | 0.0/1 |
|---|---|
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.