LEDA 668611
Observation
| Spectrum ID | 98616917_sp1 |
|---|---|
| Alt name | g1342426-335945 |
| z | 0.0188 |
| RA, Dec | 205.6775, -33.9958 |
| MJD | 59353.42 |
| SNR/Å B/R | 17.3/38.1 |
| Obs Airmass | 1.11 |
| SMSS ID | 98616917 |
| Closest SMSS | 12.49'', 2160882672 |
| SMSS Mean r6"ap | 15.6 ± 0.1 |
| 2MASS Kext | 11.9 ± 0.1 |
AGN Properties
| Spectrum Type | Sy 1.5 |
|---|---|
| Quality Flag | good |
| AGN reference | 6dFGS |
| MW E(B−V) | 0.042 |
| Power law αν | -1.31 ± 0.07 |
| log L5100,AGN | 42.21 ± 0.02 |
| log HβBr/[O III] | -0.06 ± 0.03 |
| log ML5100/M☉ | 6.42 ± 0.06 |
| log MHα/M☉ | 5.80 ± 0.07 |
| log MHβ/M☉ | 6.27 ± 0.09 |
| log M[O III]/M☉ | 6.39 ± 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 | 39.28 ± 0.09 | 217 ± 62 | 99 ± 26 | 5.32 ± 0.97 |
| Hγ Broad | 39.55 ± 0.12 | 1240 ± 82 | 446 ± 35 | 9.43 ± 1.69 |
| [O III] 4364 | 38.70 ± 0.26 | 219 ± 62 | 91 ± 25 | 1.40 ± 0.56 |
| He II Narrow | 38.78 ± 0.19 | 219 ± 62 | 91 ± 25 | 1.79 ± 0.46 |
| He II Broad | 39.71 ± 0.11 | 5228 ± 72 | 2220 ± 29 | 14.86 ± 2.30 |
| Hβ Narrow | 39.56 ± 0.04 | 217 ± 62 | 99 ± 26 | 10.84 ± 0.76 |
| Hβ Broad | 40.12 ± 0.03 | 1382 ± 81 | 699 ± 59 | 39.94 ± 1.80 |
| [O III] 5007 | 40.18 ± 0.01 | 217 ± 62 | 99 ± 26 | 46.87 ± 0.78 |
| He I Narrow | 38.62 ± 0.14 | 219 ± 62 | 91 ± 25 | 1.44 ± 0.27 |
| He I Broad | 39.41 ± 0.07 | 2030 ± 73 | 862 ± 30 | 8.85 ± 0.85 |
| [O I] 6300 | 38.84 ± 0.08 | 219 ± 62 | 91 ± 25 | 2.48 ± 0.28 |
| Hα Narrow | 40.11 ± 0.01 | 219 ± 62 | 91 ± 25 | 47.82 ± 0.33 |
| Hα Broad | 40.58 ± 0.01 | 1203 ± 63 | 436 ± 25 | 140.38 ± 0.79 |
| [N II] 6585 | 39.78 ± 0.01 | 219 ± 62 | 91 ± 25 | 22.69 ± 0.31 |
| [S II] 6718 | 39.43 ± 0.02 | 219 ± 62 | 91 ± 25 | 10.10 ± 0.30 |
| [S II] 6732 | 39.42 ± 0.02 | 219 ± 62 | 91 ± 25 | 9.92 ± 0.33 |
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 | 15.10 |
|---|---|
| Hβ Broad SNR | 5.32 |
| Hγ Broad SNR | 2.11 |
| AGN frac | 0.24 |
| Host frac | 0.76 |
| log L5100,Host | 42.72 |
| Fe II/Hβ | 1.25 |
| Fe II/[O III] | 1.09 |
Quality flags
spurious_hab/hbb | 0.0/0 |
|---|---|
l5100 | 1 |
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.