ESO 198-24
Observation
| Spectrum ID | 503604957_sp2 |
|---|---|
| Alt name | ESO 198-24 |
| z | 0.0452 |
| RA, Dec | 39.5822, -52.1923 |
| MJD | 59500.62 |
| SNR/Å B/R | 14.0/36.7 |
| Obs Airmass | 1.07 |
| SMSS ID | 503604957 |
| Closest SMSS | 14.64'', 503604956 |
| SMSS Mean r6"ap | 15.6 ± 0.2 |
| 2MASS Kext | 11.1 ± 0.0 |
AGN Properties
| Spectrum Type | Sy 1.8+ |
|---|---|
| Quality Flag | good |
| AGN reference | PGC |
| MW E(B−V) | 0.029 |
| Power law αν | -1.94 ± 0.04 |
| log L5100,AGN | 43.04 ± 0.01 |
| log HβBr/[O III] | <-0.78 |
| log ML5100/M☉ | — |
| log MHα/M☉ | 8.30 ± 0.01 |
| log MHβ/M☉ | — |
| log M[O III]/M☉ | — |
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 | 39.42 ± 0.38 | 298 ± 62 | 260 ± 26 | 1.23 ± 0.90 |
| Hγ Broad | — | — | — | — |
| [O III] 4364 | 39.76 ± 0.14 | 277 ± 62 | 117 ± 25 | 2.65 ± 0.49 |
| He II Narrow | 39.10 ± 0.41 | 277 ± 62 | 117 ± 25 | 0.58 ± 0.41 |
| He II Broad | — | — | — | — |
| Hβ Narrow | 40.21 ± 0.06 | 298 ± 62 | 260 ± 26 | 7.59 ± 0.77 |
| Hβ Broad | <40.48 | — | — | — |
| [O III] 5007 | 41.26 ± 0.01 | 298 ± 62 | 260 ± 26 | 84.76 ± 0.80 |
| He I Narrow | 39.15 ± 0.24 | 277 ± 62 | 117 ± 25 | 0.67 ± 0.19 |
| He I Broad | 39.63 ± 0.22 | 1900 ± 63 | 807 ± 25 | 2.00 ± 0.49 |
| [O I] 6300 | 40.07 ± 0.03 | 277 ± 62 | 117 ± 25 | 5.54 ± 0.20 |
| Hα Narrow | 40.65 ± 0.01 | 277 ± 62 | 117 ± 25 | 21.32 ± 0.25 |
| Hα Broad | 41.85 ± 0.01 | 8707 ± 77 | 3250 ± 25 | 338.98 ± 1.22 |
| [N II] 6585 | 40.63 ± 0.01 | 277 ± 62 | 117 ± 25 | 20.39 ± 0.25 |
| [S II] 6718 | 40.15 ± 0.02 | 277 ± 62 | 117 ± 25 | 6.65 ± 0.20 |
| [S II] 6732 | 40.17 ± 0.02 | 277 ± 62 | 117 ± 25 | 7.05 ± 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 | 8.47 |
|---|---|
| Hβ Broad SNR | 0.35 |
| Hγ Broad SNR | 0.00 |
| AGN frac | 0.39 |
| Host frac | 0.61 |
| log L5100,Host | 43.23 |
| Fe II/Hβ | — |
| Fe II/[O III] | — |
Quality flags
spurious_hab/hbb | 0.0/2 |
|---|---|
l5100 | 1 |
balmer | 2 |
balmer_snr | 2 |
hb_width | 2 |
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.