LEDA 1348
Observation
| Spectrum ID | 11907717_sp1 |
|---|---|
| Alt name | PKS 0018-19 |
| z | 0.0959 |
| RA, Dec | 5.2814, -19.1682 |
| MJD | 60932.6 |
| SNR/Å B/R | 12.1/25.6 |
| Obs Airmass | 1.03 |
| SMSS ID | 11907717 |
| Closest SMSS | 5.46'', 2021059123 |
| SMSS Mean r6"ap | 16.7 ± 0.0 |
| 2MASS Kext | 12.0 ± 0.1 |
AGN Properties
| Spectrum Type | Sy 1.5 |
|---|---|
| Quality Flag | good |
| AGN reference | K+2008 |
| MW E(B−V) | 0.019 |
| Power law αν | 0.45 ± 0.07 |
| log L5100,AGN | 42.49 ± 0.26 |
| log HβBr/[O III] | -0.24 ± 0.10 |
| log ML5100/M☉ | 7.35 ± 0.62 |
| log MHα/M☉ | 8.19 ± 0.03 |
| log MHβ/M☉ | 7.49 ± 0.60 |
| log M[O III]/M☉ | 7.74 ± 0.60 |
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 | 39.93 ± 0.23 | 328 ± 63 | 139 ± 25 | 9.47 ± 3.14 |
| He II Narrow | 39.74 ± 0.31 | 328 ± 63 | 139 ± 25 | 7.34 ± 3.39 |
| He II Broad | 40.95 ± 0.13 | 8878 ± 63 | 3770 ± 25 | 118.79 ± 18.84 |
| Hβ Narrow | — | — | — | — |
| Hβ Broad | 41.03 ± 0.10 | 3540 ± 1874 | 2338 ± 100 | 152.08 ± 18.41 |
| [O III] 5007 | 41.27 ± 0.02 | 335 ± 63 | 210 ± 33 | 293.35 ± 7.03 |
| He I Narrow | 39.81 ± 0.23 | 328 ± 63 | 139 ± 25 | 14.98 ± 3.84 |
| He I Broad | 39.55 ± 0.50 | 1196 ± 63 | 508 ± 25 | 8.01 ± 7.07 |
| [O I] 6300 | 39.84 ± 0.19 | 328 ± 63 | 139 ± 25 | 18.78 ± 4.79 |
| Hα Narrow | 40.71 ± 0.03 | 328 ± 63 | 139 ± 25 | 154.96 ± 5.61 |
| Hα Broad | 41.71 ± 0.02 | 8487 ± 193 | 3215 ± 25 | 1536.59 ± 32.46 |
| [N II] 6585 | 40.77 ± 0.02 | 328 ± 63 | 139 ± 25 | 179.29 ± 5.72 |
| [S II] 6718 | 40.54 ± 0.04 | 328 ± 63 | 139 ± 25 | 109.90 ± 6.35 |
| [S II] 6732 | 40.44 ± 0.05 | 328 ± 63 | 139 ± 25 | 88.71 ± 6.39 |
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 | 2.27 |
|---|---|
| Hβ Broad SNR | 1.19 |
| Hγ Broad SNR | 0.81 |
| AGN frac | 0.05 |
| Host frac | 0.95 |
| log L5100,Host | 43.80 |
| Fe II/Hβ | 0.46 |
| Fe II/[O III] | 0.26 |
Quality flags
spurious_hab/hbb | 0.0/0 |
|---|---|
l5100 | 2 |
balmer | 1 |
balmer_snr | 2 |
hb_width | 1 |
balmer_width | 2 |
Hα mass estimates from Cho+2023. Remaining mass estimates from R–L relations in Wang & Woo 2024 and zero-points from Amrutha+2026.