LEDA 2816917
Observation
| Spectrum ID | 308745927_sp1 |
|---|---|
| Alt name | g1438031-450146 |
| z | 0.0740 |
| RA, Dec | 219.5128, -45.0294 |
| MJD | 60055.61 |
| SNR/Å B/R | 13.6/16.9 |
| Obs Airmass | 1.03 |
| SMSS ID | 308745927 |
| Closest SMSS | 0.87'', 2458118525 |
| SMSS Mean r6"ap | 16.7 ± 0.1 |
| 2MASS Kext | 13.3 ± 0.2 |
AGN Properties
| Spectrum Type | Sy 1.5 |
|---|---|
| Quality Flag | good |
| AGN reference | 6dFGS |
| MW E(B−V) | 0.133 |
| Power law αν | -1.05 ± 0.05 |
| log L5100,AGN | 43.59 ± 0.01 |
| log HβBr/[O III] | -0.20 ± 0.03 |
| log ML5100/M☉ | 7.49 ± 0.04 |
| log MHα/M☉ | 6.99 ± 0.04 |
| log MHβ/M☉ | 7.39 ± 0.04 |
| log M[O III]/M☉ | 7.64 ± 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 | 40.18 ± 0.14 | 342 ± 63 | 175 ± 25 | 1.71 ± 0.24 |
| Hγ Broad | 40.98 ± 0.06 | 1784 ± 431 | 984 ± 87 | 11.05 ± 0.67 |
| [O III] 4364 | 39.91 ± 0.17 | 316 ± 63 | 133 ± 25 | 0.94 ± 0.25 |
| He II Narrow | 40.09 ± 0.09 | 316 ± 63 | 133 ± 25 | 1.49 ± 0.20 |
| He II Broad | 40.77 ± 0.09 | 6345 ± 232 | 2694 ± 98 | 7.24 ± 0.90 |
| Hβ Narrow | 40.79 ± 0.03 | 342 ± 63 | 175 ± 25 | 7.82 ± 0.24 |
| Hβ Broad | 41.54 ± 0.03 | 2397 ± 93 | 2540 ± 122 | 43.71 ± 1.43 |
| [O III] 5007 | 41.75 ± 0.01 | 342 ± 63 | 175 ± 25 | 72.25 ± 0.30 |
| He I Narrow | 39.64 ± 0.22 | 316 ± 63 | 133 ± 25 | 0.66 ± 0.25 |
| He I Broad | 40.49 ± 0.09 | 2453 ± 198 | 1041 ± 84 | 4.82 ± 0.55 |
| [O I] 6300 | 40.46 ± 0.03 | 316 ± 63 | 133 ± 25 | 4.67 ± 0.19 |
| Hα Narrow | 41.26 ± 0.01 | 316 ± 63 | 133 ± 25 | 30.26 ± 0.26 |
| Hα Broad | 41.91 ± 0.01 | 1874 ± 75 | 830 ± 25 | 135.73 ± 0.65 |
| [N II] 6585 | 41.11 ± 0.01 | 316 ± 63 | 133 ± 25 | 21.53 ± 0.24 |
| [S II] 6718 | 40.79 ± 0.01 | 316 ± 63 | 133 ± 25 | 10.56 ± 0.22 |
| [S II] 6732 | 40.72 ± 0.02 | 316 ± 63 | 133 ± 25 | 9.11 ± 0.28 |
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 | 21.49 |
|---|---|
| Hβ Broad SNR | 6.61 |
| Hγ Broad SNR | 3.62 |
| AGN frac | 0.85 |
| Host frac | 0.15 |
| log L5100,Host | 42.83 |
| Fe II/Hβ | 0.46 |
| Fe II/[O III] | 0.28 |
Quality flags
spurious_hab/hbb | 0.0/0 |
|---|---|
l5100 | 0 |
balmer | 0 |
balmer_snr | 0 |
hb_width | 2 |
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.