LEDA 131818
Observation
| Spectrum ID | 1909982_sp1 |
|---|---|
| Alt name | g2342053-391259 |
| z | 0.0429 |
| RA, Dec | 355.5220, -39.2162 |
| MJD | 60223.55 |
| SNR/Å B/R | 20.2/34.5 |
| Obs Airmass | 1.01 |
| SMSS ID | 1909982 |
| Closest SMSS | 10.87'', 2003573913 |
| SMSS Mean r6"ap | 16.2 ± 0.0 |
| 2MASS Kext | 12.2 ± 0.1 |
AGN Properties
| Spectrum Type | Sy 1.2 |
|---|---|
| Quality Flag | good |
| AGN reference | 6dFGS |
| MW E(B−V) | 0.013 |
| Power law αν | -1.14 ± 0.13 |
| log L5100,AGN | 42.97 ± 0.01 |
| log HβBr/[O III] | 0.48 ± 0.05 |
| log ML5100/M☉ | 8.24 ± 0.04 |
| log MHα/M☉ | 6.77 ± 0.05 |
| log MHβ/M☉ | 8.01 ± 0.06 |
| log M[O III]/M☉ | 7.90 ± 0.07 |
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 | 39.59 ± 0.10 | 191 ± 63 | 282 ± 37 | 1.86 ± 0.46 |
| Hγ Broad | 39.91 ± 0.14 | 1268 ± 105 | 869 ± 210 | 3.57 ± 0.79 |
| [O III] 4364 | 39.00 ± 0.28 | 177 ± 62 | 75 ± 25 | 0.47 ± 0.17 |
| He II Narrow | 38.88 ± 0.31 | 177 ± 62 | 75 ± 25 | 0.38 ± 0.16 |
| He II Broad | 39.43 ± 0.26 | 1366 ± 66 | 580 ± 26 | 1.34 ± 0.56 |
| Hβ Narrow | 40.21 ± 0.03 | 191 ± 63 | 282 ± 37 | 8.48 ± 0.42 |
| Hβ Broad | 40.68 ± 0.04 | 7723 ± 250 | 2921 ± 29 | 24.95 ± 1.18 |
| [O III] 5007 | 40.20 ± 0.03 | 191 ± 63 | 282 ± 37 | 8.54 ± 0.42 |
| He I Narrow | 38.81 ± 0.24 | 177 ± 62 | 75 ± 25 | 0.40 ± 0.12 |
| He I Broad | 39.69 ± 0.09 | 1179 ± 62 | 500 ± 25 | 2.97 ± 0.32 |
| [O I] 6300 | 39.25 ± 0.08 | 177 ± 62 | 75 ± 25 | 1.15 ± 0.13 |
| Hα Narrow | 40.72 ± 0.01 | 177 ± 62 | 75 ± 25 | 35.45 ± 0.18 |
| Hα Broad | 41.21 ± 0.01 | 2368 ± 116 | 1289 ± 25 | 108.60 ± 0.74 |
| [N II] 6585 | 40.43 ± 0.01 | 177 ± 62 | 75 ± 25 | 18.06 ± 0.21 |
| [S II] 6718 | 39.98 ± 0.02 | 177 ± 62 | 75 ± 25 | 6.52 ± 0.15 |
| [S II] 6732 | 39.93 ± 0.02 | 177 ± 62 | 75 ± 25 | 5.89 ± 0.15 |
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 | 12.05 |
|---|---|
| Hβ Broad SNR | 1.82 |
| Hγ Broad SNR | 1.59 |
| AGN frac | 0.51 |
| Host frac | 0.49 |
| log L5100,Host | 42.95 |
| Fe II/Hβ | 1.41 |
| Fe II/[O III] | 4.23 |
Quality flags
spurious_hab/hbb | 0.0/0 |
|---|---|
l5100 | 0 |
balmer | 1 |
balmer_snr | 2 |
hb_width | 0 |
balmer_width | 1 |
Hα mass estimates from Cho+2023. Remaining mass estimates from R–L relations in Wang & Woo 2024 and zero-points from Amrutha+2026.