LEDA 3901798
Observation
| Spectrum ID | 478586083_sp1 |
|---|---|
| Alt name | g1849421-551310 |
| z | 0.0501 |
| RA, Dec | 282.4253, -55.2194 |
| MJD | 60082.66 |
| SNR/Å B/R | 8.4/17.1 |
| Obs Airmass | 1.14 |
| SMSS ID | 478586083 |
| Closest SMSS | 3.15'', 478586082 |
| SMSS Mean r6"ap | 16.8 ± 0.1 |
| 2MASS Kext | 12.1 ± 0.1 |
AGN Properties
| Spectrum Type | Sy 1.5 |
|---|---|
| Quality Flag | good |
| AGN reference | 6dFGS |
| MW E(B−V) | 0.081 |
| Power law αν | -1.97 ± 0.03 |
| log L5100,AGN | 42.38 ± 0.08 |
| log HβBr/[O III] | 0.06 ± 0.11 |
| log ML5100/M☉ | 7.00 ± 0.15 |
| log MHα/M☉ | 6.08 ± 0.10 |
| log MHβ/M☉ | 6.85 ± 0.16 |
| log M[O III]/M☉ | 6.93 ± 0.15 |
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 | 39.03 ± 0.41 | 270 ± 62 | 114 ± 25 | 2.26 ± 2.14 |
| He II Narrow | 39.55 ± 0.17 | 270 ± 62 | 114 ± 25 | 7.58 ± 1.96 |
| He II Broad | — | — | — | — |
| Hβ Narrow | — | — | — | — |
| Hβ Broad | 40.28 ± 0.10 | 2500 ± 396 | 948 ± 25 | 40.33 ± 4.93 |
| [O III] 5007 | 40.22 ± 0.04 | 274 ± 63 | 178 ± 56 | 34.71 ± 3.39 |
| He I Narrow | — | — | — | — |
| He I Broad | — | — | — | — |
| [O I] 6300 | 39.33 ± 0.15 | 270 ± 62 | 114 ± 25 | 4.51 ± 1.04 |
| Hα Narrow | 39.84 ± 0.07 | 270 ± 62 | 114 ± 25 | 14.80 ± 1.33 |
| Hα Broad | 40.69 ± 0.04 | 1543 ± 140 | 1183 ± 53 | 103.80 ± 4.92 |
| [N II] 6585 | 39.88 ± 0.06 | 270 ± 62 | 114 ± 25 | 16.05 ± 1.37 |
| [S II] 6718 | 39.50 ± 0.12 | 270 ± 62 | 114 ± 25 | 6.74 ± 1.14 |
| [S II] 6732 | 39.50 ± 0.12 | 270 ± 62 | 114 ± 25 | 6.81 ± 1.08 |
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 | 2.30 |
|---|---|
| Hβ Broad SNR | 1.24 |
| Hγ Broad SNR | 0.00 |
| AGN frac | 0.16 |
| Host frac | 0.84 |
| log L5100,Host | 43.11 |
| Fe II/Hβ | 1.99 |
| Fe II/[O III] | 2.31 |
Quality flags
spurious_hab/hbb | 0.0/0 |
|---|---|
l5100 | 2 |
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.