LEDA 287932
Observation
| Spectrum ID | 403608949_sp1 |
|---|---|
| Alt name | g1655515-680937 |
| z | 0.0518 |
| RA, Dec | 253.9647, -68.1601 |
| MJD | 60163.4 |
| SNR/Å B/R | 10.3/18.7 |
| Obs Airmass | 1.25 |
| SMSS ID | 403608949 |
| Closest SMSS | 7.92'', 403608948 |
| SMSS Mean r6"ap | 16.8 ± 0.1 |
| 2MASS Kext | 12.2 ± 0.1 |
AGN Properties
| Spectrum Type | Sy 1.2 |
|---|---|
| Quality Flag | good |
| AGN reference | 6dFGS |
| MW E(B−V) | 0.071 |
| Power law αν | -0.96 ± 0.58 |
| log L5100,AGN | 42.06 ± 0.20 |
| log HβBr/[O III] | 0.37 ± 0.07 |
| log ML5100/M☉ | 7.34 ± 0.10 |
| log MHα/M☉ | 6.99 ± 0.07 |
| log MHβ/M☉ | 7.47 ± 0.06 |
| log M[O III]/M☉ | 7.40 ± 0.06 |
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 | 39.49 ± 0.19 | 199 ± 63 | 165 ± 56 | 11.58 ± 5.13 |
| Hγ Broad | — | — | — | — |
| [O III] 4364 | 39.53 ± 0.13 | 197 ± 63 | 83 ± 25 | 12.85 ± 2.44 |
| He II Narrow | — | — | — | — |
| He II Broad | — | — | — | — |
| Hβ Narrow | 39.20 ± 0.27 | 199 ± 63 | 165 ± 56 | 6.63 ± 4.71 |
| Hβ Broad | 40.60 ± 0.05 | 4308 ± 72 | 1600 ± 31 | 164.67 ± 11.48 |
| [O III] 5007 | 40.23 ± 0.04 | 199 ± 63 | 165 ± 56 | 74.54 ± 5.12 |
| He I Narrow | — | — | — | — |
| He I Broad | 40.33 ± 0.09 | 5896 ± 63 | 2504 ± 25 | 110.17 ± 12.49 |
| [O I] 6300 | 38.96 ± 0.28 | 197 ± 63 | 83 ± 25 | 5.16 ± 2.13 |
| Hα Narrow | 39.83 ± 0.06 | 197 ± 63 | 83 ± 25 | 39.39 ± 2.85 |
| Hα Broad | 41.18 ± 0.01 | 3110 ± 209 | 1420 ± 29 | 887.87 ± 12.44 |
| [N II] 6585 | 39.61 ± 0.08 | 197 ± 63 | 83 ± 25 | 23.98 ± 2.71 |
| [S II] 6718 | 39.40 ± 0.11 | 197 ± 63 | 83 ± 25 | 14.90 ± 2.29 |
| [S II] 6732 | 39.27 ± 0.15 | 197 ± 63 | 83 ± 25 | 11.21 ± 2.31 |
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 | 5.68 |
|---|---|
| Hβ Broad SNR | 1.60 |
| Hγ Broad SNR | 0.96 |
| AGN frac | 0.07 |
| Host frac | 0.93 |
| log L5100,Host | 43.17 |
| Fe II/Hβ | 0.46 |
| Fe II/[O III] | 1.04 |
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.