LEDA 3904185
Observation
| Spectrum ID | 476888663_sp1 |
|---|---|
| Alt name | g1906088-485027 |
| z | 0.0488 |
| RA, Dec | 286.5364, -48.8409 |
| MJD | 59078.45 |
| SNR/Å B/R | 7.1/15.1 |
| Obs Airmass | 1.06 |
| SMSS ID | 476888663 |
| Closest SMSS | 13.63'', 476888664 |
| SMSS Mean r6"ap | 15.9 ± 0.0 |
| 2MASS Kext | 11.3 ± 0.1 |
AGN Properties
| Spectrum Type | Sy 1.2 |
|---|---|
| Quality Flag | good |
| AGN reference | 6dFGS |
| MW E(B−V) | 0.061 |
| Power law αν | -1.68 ± 0.15 |
| log L5100,AGN | 42.45 ± 0.05 |
| log HβBr/[O III] | 0.56 ± 0.04 |
| log ML5100/M☉ | 7.67 ± 0.07 |
| log MHα/M☉ | 7.12 ± 0.03 |
| log MHβ/M☉ | 7.85 ± 0.07 |
| log M[O III]/M☉ | 7.71 ± 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 | 39.47 ± 0.40 | 491 ± 79 | 515 ± 31 | 5.06 ± 3.37 |
| Hγ Broad | 40.28 ± 0.13 | 3174 ± 735 | 1036 ± 63 | 32.26 ± 4.20 |
| [O III] 4364 | 39.16 ± 0.42 | 354 ± 63 | 149 ± 25 | 2.48 ± 1.67 |
| He II Narrow | 39.40 ± 0.23 | 354 ± 63 | 149 ± 25 | 4.42 ± 1.55 |
| He II Broad | 40.34 ± 0.14 | 7783 ± 65 | 3305 ± 26 | 38.12 ± 6.96 |
| Hβ Narrow | 40.06 ± 0.15 | 491 ± 79 | 515 ± 31 | 19.68 ± 2.94 |
| Hβ Broad | 41.07 ± 0.03 | 5214 ± 354 | 1998 ± 33 | 207.87 ± 6.01 |
| [O III] 5007 | 40.51 ± 0.03 | 491 ± 79 | 515 ± 31 | 58.69 ± 3.03 |
| He I Narrow | 39.08 ± 0.24 | 354 ± 63 | 149 ± 25 | 2.26 ± 0.77 |
| He I Broad | 40.44 ± 0.06 | 6677 ± 64 | 2836 ± 26 | 52.19 ± 3.80 |
| [O I] 6300 | 39.02 ± 0.26 | 354 ± 63 | 149 ± 25 | 2.02 ± 0.75 |
| Hα Narrow | 40.05 ± 0.04 | 354 ± 63 | 149 ± 25 | 22.19 ± 1.07 |
| Hα Broad | 41.40 ± 0.01 | 3096 ± 81 | 1302 ± 25 | 496.41 ± 3.16 |
| [N II] 6585 | 40.03 ± 0.04 | 354 ± 63 | 149 ± 25 | 21.04 ± 1.01 |
| [S II] 6718 | 39.67 ± 0.07 | 354 ± 63 | 149 ± 25 | 9.13 ± 0.82 |
| [S II] 6732 | 39.65 ± 0.07 | 354 ± 63 | 149 ± 25 | 8.76 ± 0.87 |
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 | 9.52 |
|---|---|
| Hβ Broad SNR | 3.85 |
| Hγ Broad SNR | 1.38 |
| AGN frac | 0.26 |
| Host frac | 0.74 |
| log L5100,Host | 42.91 |
| Fe II/Hβ | 0.92 |
| Fe II/[O III] | 3.28 |
Quality flags
spurious_hab/hbb | 0.0/0 |
|---|---|
l5100 | 1 |
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.