LEDA 199154
Observation
| Spectrum ID | 2245228_sp2 |
|---|---|
| Alt name | g2253587-330014 |
| z | 0.0552 |
| RA, Dec | 343.4945, -33.0038 |
| MJD | 59027.6 |
| SNR/Å B/R | 25.9/43.6 |
| Obs Airmass | 1.60 |
| SMSS ID | 2245228 |
| Closest SMSS | 9.93'', 2004123385 |
| SMSS Mean r6"ap | 15.8 ± 0.1 |
| 2MASS Kext | 11.6 ± 0.1 |
AGN Properties
| Spectrum Type | Sy 1.5 |
|---|---|
| Quality Flag | good |
| AGN reference | 6dFGS |
| MW E(B−V) | 0.016 |
| Power law αν | -0.49 ± 0.10 |
| log L5100,AGN | 43.51 ± 0.02 |
| log HβBr/[O III] | 0.06 ± 0.04 |
| log ML5100/M☉ | 8.40 ± 0.08 |
| log MHα/M☉ | 7.84 ± 0.06 |
| log MHβ/M☉ | 8.13 ± 0.09 |
| log M[O III]/M☉ | 8.24 ± 0.08 |
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 | 40.01 ± 0.11 | 401 ± 63 | 169 ± 25 | 1.28 ± 0.19 |
| He II Narrow | 39.19 ± 0.47 | 401 ± 63 | 169 ± 25 | 0.22 ± 0.19 |
| He II Broad | 39.97 ± 0.22 | 1178 ± 62 | 500 ± 25 | 1.29 ± 0.34 |
| Hβ Narrow | 40.43 ± 0.06 | 447 ± 63 | 322 ± 27 | 3.89 ± 0.31 |
| Hβ Broad | 41.11 ± 0.04 | 7117 ± 664 | 2882 ± 36 | 18.60 ± 0.87 |
| [O III] 5007 | 41.05 ± 0.01 | 447 ± 63 | 322 ± 27 | 17.31 ± 0.33 |
| He I Narrow | 39.32 ± 0.27 | 401 ± 63 | 169 ± 25 | 0.41 ± 0.17 |
| He I Broad | 41.26 ± 0.03 | 17661 ± 62 | 7500 ± 25 | 35.64 ± 1.37 |
| [O I] 6300 | 40.04 ± 0.05 | 401 ± 63 | 169 ± 25 | 2.40 ± 0.18 |
| Hα Narrow | 41.04 ± 0.01 | 401 ± 63 | 169 ± 25 | 25.32 ± 0.25 |
| Hα Broad | 41.92 ± 0.01 | 4921 ± 366 | 2867 ± 25 | 192.39 ± 1.02 |
| [N II] 6585 | 40.88 ± 0.01 | 401 ± 63 | 169 ± 25 | 17.66 ± 0.24 |
| [S II] 6718 | 40.34 ± 0.03 | 401 ± 63 | 169 ± 25 | 5.30 ± 0.21 |
| [S II] 6732 | 40.24 ± 0.03 | 401 ± 63 | 169 ± 25 | 4.22 ± 0.20 |
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 | 11.70 |
|---|---|
| Hβ Broad SNR | 1.98 |
| Hγ Broad SNR | 0.49 |
| AGN frac | 0.49 |
| Host frac | 0.51 |
| log L5100,Host | 43.52 |
| Fe II/Hβ | — |
| Fe II/[O III] | — |
Quality flags
spurious_hab/hbb | 0.0/0 |
|---|---|
l5100 | 1 |
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.