LEDA 3097048
Observation
| Spectrum ID | 184316224_sp1 |
|---|---|
| Alt name | g1706507-184238 |
| z | 0.0284 |
| RA, Dec | 256.7112, -18.7104 |
| MJD | 60164.42 |
| SNR/Å B/R | 14.8/30.5 |
| Obs Airmass | 1.02 |
| SMSS ID | 184316224 |
| Closest SMSS | 7.48'', 184316225 |
| SMSS Mean r6"ap | 16.0 ± 0.0 |
| 2MASS Kext | 11.0 ± 0.1 |
AGN Properties
| Spectrum Type | Sy 1.8+ |
|---|---|
| Quality Flag | good |
| AGN reference | 6dFGS |
| MW E(B−V) | 0.228 |
| Power law αν | -1.94 ± 0.08 |
| log L5100,AGN | 41.25 ± 0.56 |
| log HβBr/[O III] | <-0.96 |
| log ML5100/M☉ | — |
| log MHα/M☉ | 6.58 ± 0.06 |
| 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 | — | — | — | — |
| Hγ Broad | — | — | — | — |
| [O III] 4364 | — | — | — | — |
| He II Narrow | 38.68 ± 0.49 | 326 ± 62 | 138 ± 25 | 14.00 ± 11.23 |
| He II Broad | — | — | — | — |
| Hβ Narrow | 39.88 ± 0.05 | 359 ± 63 | 213 ± 25 | 223.33 ± 15.99 |
| Hβ Broad | <39.90 | — | — | — |
| [O III] 5007 | 40.86 ± 0.01 | 359 ± 63 | 213 ± 25 | 2133.33 ± 17.41 |
| He I Narrow | 38.87 ± 0.25 | 326 ± 62 | 138 ± 25 | 21.93 ± 6.89 |
| He I Broad | 39.40 ± 0.28 | 4043 ± 62 | 1717 ± 25 | 74.68 ± 41.58 |
| [O I] 6300 | 39.65 ± 0.05 | 326 ± 62 | 138 ± 25 | 132.54 ± 7.90 |
| Hα Narrow | 40.30 ± 0.01 | 326 ± 62 | 138 ± 25 | 589.50 ± 8.47 |
| Hα Broad | 40.91 ± 0.01 | 2338 ± 95 | 1763 ± 35 | 2407.71 ± 37.19 |
| [N II] 6585 | 40.54 ± 0.01 | 326 ± 62 | 138 ± 25 | 1021.72 ± 9.14 |
| [S II] 6718 | 40.06 ± 0.02 | 326 ± 62 | 138 ± 25 | 343.52 ± 9.03 |
| [S II] 6732 | 40.09 ± 0.02 | 326 ± 62 | 138 ± 25 | 367.51 ± 8.58 |
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 | 5.71 |
|---|---|
| Hβ Broad SNR | 0.32 |
| Hγ Broad SNR | 0.00 |
| AGN frac | 0.01 |
| Host frac | 0.99 |
| log L5100,Host | 43.08 |
| Fe II/Hβ | — |
| Fe II/[O III] | — |
Quality flags
spurious_hab/hbb | 0.0/2 |
|---|---|
l5100 | 2 |
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.