LEDA 3923571
Observation
| Spectrum ID | 487472887_sp1 |
|---|---|
| Alt name | g2025574-482226 |
| z | 0.0674 |
| RA, Dec | 306.4891, -48.3739 |
| MJD | 60166.5 |
| SNR/Å B/R | 18.5/25.3 |
| Obs Airmass | 1.08 |
| SMSS ID | 487472887 |
| Closest SMSS | 12.22'', 487472888 |
| SMSS Mean r6"ap | 15.9 ± 0.1 |
| 2MASS Kext | 12.0 ± 0.1 |
AGN Properties
| Spectrum Type | Sy 1.5 |
|---|---|
| Quality Flag | good |
| AGN reference | 6dFGS |
| MW E(B−V) | 0.030 |
| Power law αν | 0.02 ± 0.08 |
| log L5100,AGN | 43.63 ± 0.01 |
| log HβBr/[O III] | 0.12 ± 0.15 |
| log ML5100/M☉ | 7.59 ± 0.02 |
| log MHα/M☉ | 7.39 ± 0.03 |
| log MHβ/M☉ | 7.54 ± 0.08 |
| log M[O III]/M☉ | 7.64 ± 0.02 |
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 | 40.26 ± 0.12 | 356 ± 63 | 209 ± 25 | 1.56 ± 0.22 |
| Hγ Broad | 41.33 ± 0.03 | 2279 ± 190 | 1195 ± 89 | 18.42 ± 0.68 |
| [O III] 4364 | — | — | — | — |
| He II Narrow | 39.78 ± 0.16 | 238 ± 63 | 99 ± 25 | 0.61 ± 0.14 |
| He II Broad | — | — | — | — |
| Hβ Narrow | 40.69 ± 0.04 | 356 ± 63 | 209 ± 25 | 5.37 ± 0.27 |
| Hβ Broad | 41.70 +0.28−0.01 | 2653 ± 56 | 998 ± 29 | 54.80 ± 0.57 |
| [O III] 5007 | 41.58 ± 0.01 | 356 ± 63 | 209 ± 25 | 43.81 ± 0.30 |
| He I Narrow | 39.76 ± 0.10 | 238 ± 63 | 99 ± 25 | 0.92 ± 0.14 |
| He I Broad | 41.11 ± 0.02 | 3314 ± 122 | 1407 ± 51 | 20.24 ± 0.60 |
| [O I] 6300 | 39.89 ± 0.07 | 238 ± 63 | 99 ± 25 | 1.44 ± 0.16 |
| Hα Narrow | 41.09 ± 0.01 | 238 ± 63 | 99 ± 25 | 24.29 ± 0.30 |
| Hα Broad | 42.38 ± 0.01 | 2137 ± 64 | 1103 ± 25 | 474.68 ± 1.05 |
| [N II] 6585 | 40.91 ± 0.01 | 238 ± 63 | 99 ± 25 | 16.16 ± 0.26 |
| [S II] 6718 | 40.33 ± 0.03 | 238 ± 63 | 99 ± 25 | 4.46 ± 0.20 |
| [S II] 6732 | 40.36 ± 0.03 | 238 ± 63 | 99 ± 25 | 4.84 ± 0.21 |
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 | 52.43 |
|---|---|
| Hβ Broad SNR | 14.57 |
| Hγ Broad SNR | 6.52 |
| AGN frac | 0.73 |
| Host frac | 0.27 |
| log L5100,Host | 43.19 |
| Fe II/Hβ | — |
| Fe II/[O III] | — |
Quality flags
spurious_hab/hbb | 0.0/1 |
|---|---|
l5100 | 0 |
balmer | 0 |
balmer_snr | 0 |
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.