LEDA 710782
Observation
| Spectrum ID | 19517578_sp1 |
|---|---|
| Alt name | g0457224-305815 |
| z | 0.0608 |
| RA, Dec | 74.3434, -30.9707 |
| MJD | 60261.5 |
| SNR/Å B/R | 13.2/23.0 |
| Obs Airmass | 1.41 |
| SMSS ID | 19517578 |
| Closest SMSS | None (< 15") |
| SMSS Mean r6"ap | 16.5 ± 0.1 |
| 2MASS Kext | 12.2 ± 0.1 |
AGN Properties
| Spectrum Type | Sy 1.5 |
|---|---|
| Quality Flag | good |
| AGN reference | 6dFGS |
| MW E(B−V) | 0.010 |
| Power law αν | 0.45 ± 0.04 |
| log L5100,AGN | 43.29 ± 0.02 |
| log HβBr/[O III] | 0.03 ± 0.03 |
| log ML5100/M☉ | 7.70 ± 0.05 |
| log MHα/M☉ | 7.44 ± 0.02 |
| log MHβ/M☉ | 7.65 ± 0.06 |
| log M[O III]/M☉ | 7.78 ± 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 | 40.10 ± 0.19 | 341 ± 63 | 265 ± 27 | 2.23 ± 0.69 |
| Hγ Broad | 40.48 ± 0.15 | 1806 ± 311 | 656 ± 79 | 4.90 ± 1.07 |
| [O III] 4364 | 39.87 ± 0.20 | 308 ± 63 | 129 ± 25 | 1.32 ± 0.42 |
| He II Narrow | 39.87 ± 0.18 | 308 ± 63 | 129 ± 25 | 1.57 ± 0.39 |
| He II Broad | 41.19 ± 0.08 | 17659 ± 63 | 7499 ± 25 | 33.02 ± 3.14 |
| Hβ Narrow | 40.40 ± 0.07 | 341 ± 63 | 265 ± 27 | 5.82 ± 0.72 |
| Hβ Broad | 41.37 ± 0.03 | 3568 ± 187 | 1889 ± 105 | 55.31 ± 2.17 |
| [O III] 5007 | 41.34 ± 0.01 | 341 ± 63 | 265 ± 27 | 54.57 ± 0.79 |
| He I Narrow | — | — | — | — |
| He I Broad | 40.66 ± 0.10 | 7520 ± 109 | 3194 ± 46 | 16.71 ± 2.05 |
| [O I] 6300 | 40.05 ± 0.06 | 308 ± 63 | 129 ± 25 | 4.94 ± 0.43 |
| Hα Narrow | 40.70 ± 0.02 | 308 ± 63 | 129 ± 25 | 24.19 ± 0.69 |
| Hα Broad | 42.04 ± 0.01 | 2872 ± 67 | 2489 ± 48 | 530.22 ± 4.02 |
| [N II] 6585 | 40.84 ± 0.02 | 308 ± 63 | 129 ± 25 | 33.58 ± 0.66 |
| [S II] 6718 | 40.38 ± 0.03 | 308 ± 63 | 129 ± 25 | 12.21 ± 0.55 |
| [S II] 6732 | 40.37 ± 0.04 | 308 ± 63 | 129 ± 25 | 12.11 ± 0.65 |
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 | 13.47 |
|---|---|
| Hβ Broad SNR | 3.67 |
| Hγ Broad SNR | 1.21 |
| AGN frac | 0.40 |
| Host frac | 0.60 |
| log L5100,Host | 43.47 |
| Fe II/Hβ | 0.34 |
| Fe II/[O III] | 0.36 |
Quality flags
spurious_hab/hbb | 0.0/0 |
|---|---|
l5100 | 2 |
balmer | 0 |
balmer_snr | 1 |
hb_width | 1 |
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.