LEDA 14640
Observation
| Spectrum ID | 497171829_sp1 |
|---|---|
| Alt name | g0412220-690821 |
| z | 0.0420 |
| RA, Dec | 63.0915, -69.1392 |
| MJD | 60257.65 |
| SNR/Å B/R | 16.9/31.1 |
| Obs Airmass | 1.27 |
| SMSS ID | 497171829 |
| Closest SMSS | 12.52'', 2712582647 |
| SMSS Mean r6"ap | 16.1 ± 0.1 |
| 2MASS Kext | 12.1 ± 0.1 |
AGN Properties
| Spectrum Type | Sy 1.8 |
|---|---|
| Quality Flag | good |
| AGN reference | 6dFGS |
| MW E(B−V) | 0.050 |
| Power law αν | 0.13 ± 0.19 |
| log L5100,AGN | 42.93 ± 0.03 |
| log HβBr/[O III] | -0.86 ± 0.51 |
| log ML5100/M☉ | 7.37 ± 0.03 |
| log MHα/M☉ | 6.89 ± 0.04 |
| log MHβ/M☉ | 6.96 ± 0.25 |
| log M[O III]/M☉ | 7.48 ± 0.03 |
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 | 39.96 ± 0.09 | 308 ± 63 | 227 ± 26 | 3.94 ± 0.56 |
| Hγ Broad | — | — | — | — |
| [O III] 4364 | 39.28 ± 0.28 | 272 ± 62 | 115 ± 25 | 0.84 ± 0.34 |
| He II Narrow | 39.55 ± 0.13 | 272 ± 62 | 115 ± 25 | 1.80 ± 0.33 |
| He II Broad | — | — | — | — |
| Hβ Narrow | 40.34 ± 0.03 | 308 ± 63 | 227 ± 26 | 11.98 ± 0.54 |
| Hβ Broad | 40.23 +0.91−0.10 | 2911 ± 61 | 1074 ± 30 | 9.33 ± 1.12 |
| [O III] 5007 | 41.09 ± 0.01 | 308 ± 63 | 227 ± 26 | 71.03 ± 0.62 |
| He I Narrow | 39.43 ± 0.11 | 272 ± 62 | 115 ± 25 | 2.18 ± 0.28 |
| He I Broad | 40.16 ± 0.07 | 3264 ± 73 | 1386 ± 30 | 11.87 ± 1.04 |
| [O I] 6300 | 39.52 ± 0.08 | 272 ± 62 | 115 ± 25 | 3.12 ± 0.34 |
| Hα Narrow | 40.84 ± 0.01 | 272 ± 62 | 115 ± 25 | 71.01 ± 0.53 |
| Hα Broad | 41.29 ± 0.01 | 2551 ± 69 | 951 ± 25 | 202.14 ± 1.37 |
| [N II] 6585 | 40.78 ± 0.01 | 272 ± 62 | 115 ± 25 | 63.47 ± 0.54 |
| [S II] 6718 | 40.19 ± 0.02 | 272 ± 62 | 115 ± 25 | 16.86 ± 0.39 |
| [S II] 6732 | 40.12 ± 0.02 | 272 ± 62 | 115 ± 25 | 14.51 ± 0.40 |
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 | 10.35 |
|---|---|
| Hβ Broad SNR | 1.07 |
| Hγ Broad SNR | 0.00 |
| AGN frac | 0.37 |
| Host frac | 0.63 |
| log L5100,Host | 43.16 |
| Fe II/Hβ | — |
| Fe II/[O III] | — |
Quality flags
spurious_hab/hbb | 0.0/2 |
|---|---|
l5100 | 1 |
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.