LEDA 161815
Observation
| Spectrum ID | 486962794_sp1 |
|---|---|
| Alt name | g1958565-422230 |
| z | 0.0320 |
| RA, Dec | 299.7356, -42.3751 |
| MJD | 60164.54 |
| SNR/Å B/R | 15.3/28.8 |
| Obs Airmass | 1.02 |
| SMSS ID | 486962794 |
| Closest SMSS | 5.21'', 2696295810 |
| SMSS Mean r6"ap | 15.8 ± 0.1 |
| 2MASS Kext | 12.4 ± 0.1 |
AGN Properties
| Spectrum Type | Sy 1.8+ |
|---|---|
| Quality Flag | good |
| AGN reference | 6dFGS |
| MW E(B−V) | 0.066 |
| Power law αν | -1.73 ± 0.07 |
| log L5100,AGN | 42.76 ± 0.02 |
| log HβBr/[O III] | <-0.54 |
| log ML5100/M☉ | — |
| log MHα/M☉ | 7.71 ± 0.03 |
| log MHβ/M☉ | — |
| log M[O III]/M☉ | — |
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 | 39.28 ± 0.22 | 253 ± 63 | 205 ± 26 | 1.59 ± 0.68 |
| Hγ Broad | — | — | — | — |
| [O III] 4364 | 39.08 ± 0.25 | 229 ± 62 | 96 ± 25 | 1.02 ± 0.36 |
| He II Narrow | — | — | — | — |
| He II Broad | — | — | — | — |
| Hβ Narrow | 40.01 ± 0.03 | 253 ± 63 | 205 ± 26 | 8.87 ± 0.52 |
| Hβ Broad | <40.13 | — | — | — |
| [O III] 5007 | 40.67 ± 0.01 | 253 ± 63 | 205 ± 26 | 41.23 ± 0.56 |
| He I Narrow | 38.62 ± 0.37 | 229 ± 62 | 96 ± 25 | 0.38 ± 0.20 |
| He I Broad | 39.25 ± 0.22 | 1178 ± 62 | 500 ± 25 | 1.64 ± 0.45 |
| [O I] 6300 | 39.83 ± 0.03 | 229 ± 62 | 96 ± 25 | 6.25 ± 0.23 |
| Hα Narrow | 40.52 ± 0.01 | 229 ± 62 | 96 ± 25 | 30.99 ± 0.26 |
| Hα Broad | 41.43 ± 0.01 | 5963 ± 101 | 2408 ± 25 | 253.42 ± 1.30 |
| [N II] 6585 | 39.88 ± 0.03 | 229 ± 62 | 96 ± 25 | 7.19 ± 0.24 |
| [S II] 6718 | 40.00 ± 0.02 | 229 ± 62 | 96 ± 25 | 9.42 ± 0.25 |
| [S II] 6732 | 39.94 ± 0.02 | 229 ± 62 | 96 ± 25 | 8.38 ± 0.24 |
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 | 9.54 |
|---|---|
| Hβ Broad SNR | 0.00 |
| Hγ Broad SNR | 0.00 |
| AGN frac | 0.41 |
| Host frac | 0.59 |
| log L5100,Host | 42.92 |
| Fe II/Hβ | — |
| Fe II/[O III] | — |
Quality flags
spurious_hab/hbb | 0.0/2 |
|---|---|
l5100 | 1 |
balmer | 2 |
balmer_snr | 2 |
hb_width | 2 |
balmer_width | 2 |
Hα mass estimates from Cho+2023. Remaining mass estimates from R–L relations in Wang & Woo 2024 and zero-points from Amrutha+2026.