LEDA 958725
Observation
| Spectrum ID | 3971217_sp1 |
|---|---|
| Alt name | g2147133-120126 |
| z | 0.0483 |
| RA, Dec | 326.8053, -12.0238 |
| MJD | 60090.75 |
| SNR/Å B/R | 16.0/21.9 |
| Obs Airmass | 1.14 |
| SMSS ID | 3971217 |
| Closest SMSS | None (< 15") |
| SMSS Mean r6"ap | 16.2 ± 0.0 |
| 2MASS Kext | 12.8 ± 0.1 |
AGN Properties
| Spectrum Type | Sy 1.5 |
|---|---|
| Quality Flag | good |
| AGN reference | 6dFGS |
| MW E(B−V) | 0.043 |
| Power law αν | -0.96 ± 0.20 |
| log L5100,AGN | 43.14 ± 0.03 |
| log HβBr/[O III] | 0.26 ± 0.03 |
| log ML5100/M☉ | 7.75 ± 0.04 |
| log MHα/M☉ | 7.00 ± 0.03 |
| log MHβ/M☉ | 7.61 ± 0.05 |
| log M[O III]/M☉ | 7.61 ± 0.05 |
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 | 39.97 ± 0.09 | 241 ± 63 | 349 ± 32 | 2.91 ± 0.58 |
| Hγ Broad | 40.20 ± 0.14 | 2307 ± 316 | 825 ± 58 | 4.59 ± 0.76 |
| [O III] 4364 | 39.26 ± 0.28 | 226 ± 62 | 95 ± 25 | 0.57 ± 0.22 |
| He II Narrow | 39.15 ± 0.30 | 226 ± 62 | 95 ± 25 | 0.47 ± 0.23 |
| He II Broad | 40.51 ± 0.07 | 4094 ± 105 | 1739 ± 44 | 10.85 ± 0.99 |
| Hβ Narrow | 40.57 ± 0.03 | 241 ± 63 | 350 ± 32 | 13.01 ± 0.56 |
| Hβ Broad | 41.02 ± 0.02 | 4069 ± 153 | 1543 ± 37 | 36.15 ± 0.98 |
| [O III] 5007 | 40.76 ± 0.02 | 241 ± 63 | 350 ± 32 | 20.55 ± 0.56 |
| He I Narrow | 39.18 ± 0.24 | 226 ± 62 | 95 ± 25 | 0.64 ± 0.20 |
| He I Broad | 40.31 ± 0.07 | 2607 ± 83 | 1107 ± 34 | 8.87 ± 0.75 |
| [O I] 6300 | 39.60 ± 0.09 | 226 ± 62 | 95 ± 25 | 1.81 ± 0.22 |
| Hα Narrow | 41.03 ± 0.01 | 226 ± 62 | 95 ± 25 | 50.95 ± 0.36 |
| Hα Broad | 41.54 ± 0.01 | 2424 ± 70 | 1019 ± 37 | 166.40 ± 1.30 |
| [N II] 6585 | 40.74 ± 0.01 | 226 ± 62 | 95 ± 25 | 26.36 ± 0.32 |
| [S II] 6718 | 40.33 ± 0.02 | 226 ± 62 | 95 ± 25 | 10.45 ± 0.26 |
| [S II] 6732 | 40.25 ± 0.02 | 226 ± 62 | 95 ± 25 | 8.69 ± 0.27 |
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 | 14.92 |
|---|---|
| Hβ Broad SNR | 3.89 |
| Hγ Broad SNR | 1.20 |
| AGN frac | 0.53 |
| Host frac | 0.47 |
| log L5100,Host | 43.09 |
| Fe II/Hβ | 0.90 |
| Fe II/[O III] | 1.63 |
Quality flags
spurious_hab/hbb | 0.0/0 |
|---|---|
l5100 | 0 |
balmer | 0 |
balmer_snr | 1 |
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.