LEDA 401274
Observation
| Spectrum ID | 489600086_sp1 |
|---|---|
| Alt name | g2335263-561806 |
| z | 0.0341 |
| RA, Dec | 353.8594, -56.3018 |
| MJD | 60478.81 |
| SNR/Å B/R | 11.3/26.5 |
| Obs Airmass | 1.11 |
| SMSS ID | 489600086 |
| Closest SMSS | 6.11'', 2701858900 |
| SMSS Mean r6"ap | 15.7 ± 0.0 |
| 2MASS Kext | 12.3 ± 0.1 |
AGN Properties
| Spectrum Type | Sy 1.5 |
|---|---|
| Quality Flag | good |
| AGN reference | 6dFGS |
| MW E(B−V) | 0.013 |
| Power law αν | -1.94 ± 0.06 |
| log L5100,AGN | 42.47 ± 0.05 |
| log HβBr/[O III] | -0.35 ± 0.11 |
| log ML5100/M☉ | 7.05 ± 0.23 |
| log MHα/M☉ | 6.72 ± 0.04 |
| log MHβ/M☉ | 6.90 ± 0.24 |
| log M[O III]/M☉ | 7.17 ± 0.23 |
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 | — | — | — | — |
| Hγ Broad | — | — | — | — |
| [O III] 4364 | 39.40 ± 0.26 | 369 ± 63 | 156 ± 25 | 4.39 ± 1.63 |
| He II Narrow | — | — | — | — |
| He II Broad | 39.54 ± 0.36 | 2118 ± 63 | 899 ± 25 | 6.11 ± 3.20 |
| Hβ Narrow | 39.96 ± 0.15 | 483 ± 66 | 474 ± 28 | 15.82 ± 2.45 |
| Hβ Broad | 40.37 ± 0.10 | 2514 ± 724 | 1161 ± 64 | 39.28 ± 4.01 |
| [O III] 5007 | 40.71 ± 0.02 | 483 ± 66 | 474 ± 28 | 90.00 ± 2.46 |
| He I Narrow | — | — | — | — |
| He I Broad | 40.05 ± 0.10 | 4569 ± 63 | 1940 ± 25 | 19.70 ± 2.50 |
| [O I] 6300 | 39.80 ± 0.05 | 369 ± 63 | 156 ± 25 | 11.30 ± 0.73 |
| Hα Narrow | 40.36 ± 0.02 | 369 ± 63 | 156 ± 25 | 41.21 ± 0.77 |
| Hα Broad | 41.24 ± 0.01 | 2194 ± 71 | 804 ± 25 | 307.34 ± 1.89 |
| [N II] 6585 | 40.36 ± 0.02 | 369 ± 63 | 156 ± 25 | 41.35 ± 0.77 |
| [S II] 6718 | 40.16 ± 0.02 | 369 ± 63 | 156 ± 25 | 25.86 ± 0.77 |
| [S II] 6732 | 40.09 ± 0.02 | 369 ± 63 | 156 ± 25 | 22.00 ± 0.76 |
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 | 10.85 |
|---|---|
| Hβ Broad SNR | 1.56 |
| Hγ Broad SNR | 0.83 |
| AGN frac | 0.17 |
| Host frac | 0.83 |
| log L5100,Host | 43.16 |
| Fe II/Hβ | 0.79 |
| Fe II/[O III] | 0.35 |
Quality flags
spurious_hab/hbb | 0.0/0 |
|---|---|
l5100 | 2 |
balmer | 1 |
balmer_snr | 2 |
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.