LEDA 378449
Observation
| Spectrum ID | 489411841_sp1 |
|---|---|
| Alt name | g2339430-583156 |
| z | 0.0796 |
| RA, Dec | 354.9291, -58.5323 |
| MJD | 60224.51 |
| SNR/Å B/R | 11.1/17.8 |
| Obs Airmass | 1.13 |
| SMSS ID | 489411841 |
| Closest SMSS | None (< 15") |
| SMSS Mean r6"ap | 16.7 ± 0.1 |
| 2MASS Kext | 12.6 ± 0.1 |
AGN Properties
| Spectrum Type | Sy 1.5 |
|---|---|
| Quality Flag | good |
| AGN reference | 6dFGS |
| MW E(B−V) | 0.015 |
| Power law αν | -0.79 ± 0.26 |
| log L5100,AGN | 43.35 ± 0.04 |
| log HβBr/[O III] | 0.21 ± 0.04 |
| log ML5100/M☉ | 7.52 ± 0.10 |
| log MHα/M☉ | 6.84 ± 0.04 |
| log MHβ/M☉ | 7.44 ± 0.10 |
| log M[O III]/M☉ | 7.48 ± 0.10 |
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 | 39.78 ± 0.33 | 339 ± 63 | 332 ± 37 | 1.12 ± 0.84 |
| Hγ Broad | 40.69 ± 0.15 | 1604 ± 1300 | 1620 ± 120 | 9.09 ± 1.76 |
| [O III] 4364 | 39.35 ± 0.43 | 325 ± 63 | 136 ± 25 | 0.42 ± 0.41 |
| He II Narrow | 39.63 ± 0.29 | 325 ± 63 | 136 ± 25 | 0.88 ± 0.42 |
| He II Broad | 41.07 ± 0.10 | 14124 ± 152 | 5998 ± 64 | 23.91 ± 2.97 |
| Hβ Narrow | 40.51 ± 0.08 | 339 ± 63 | 333 ± 37 | 7.01 ± 0.97 |
| Hβ Broad | 41.37 ± 0.04 | 2801 ± 308 | 1911 ± 117 | 49.88 ± 2.31 |
| [O III] 5007 | 41.15 ± 0.02 | 339 ± 63 | 333 ± 37 | 31.50 ± 1.05 |
| He I Narrow | 39.43 ± 0.32 | 325 ± 63 | 136 ± 25 | 0.73 ± 0.34 |
| He I Broad | 40.32 ± 0.13 | 2154 ± 236 | 915 ± 100 | 5.56 ± 1.05 |
| [O I] 6300 | 39.68 ± 0.17 | 325 ± 63 | 136 ± 25 | 1.40 ± 0.35 |
| Hα Narrow | 40.96 ± 0.02 | 325 ± 63 | 136 ± 25 | 28.13 ± 0.53 |
| Hα Broad | 41.81 ± 0.01 | 1689 ± 76 | 851 ± 26 | 196.95 ± 1.47 |
| [N II] 6585 | 40.85 ± 0.02 | 325 ± 63 | 136 ± 25 | 22.09 ± 0.51 |
| [S II] 6718 | 40.37 ± 0.05 | 325 ± 63 | 136 ± 25 | 7.40 ± 0.63 |
| [S II] 6732 | 40.25 ± 0.06 | 325 ± 63 | 136 ± 25 | 5.62 ± 0.59 |
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 | 14.90 |
|---|---|
| Hβ Broad SNR | 3.74 |
| Hγ Broad SNR | 1.13 |
| AGN frac | 0.50 |
| Host frac | 0.50 |
| log L5100,Host | 43.35 |
| Fe II/Hβ | 0.99 |
| Fe II/[O III] | 1.62 |
Quality flags
spurious_hab/hbb | 0.0/0 |
|---|---|
l5100 | 0 |
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.