LEDA 287932
Observation
| Spectrum ID | 403608949_sp2 |
|---|---|
| Alt name | g1655515-680937 |
| z | 0.0518 |
| RA, Dec | 253.9647, -68.1601 |
| MJD | 60163.4 |
| SNR/Å B/R | 9.3/20.8 |
| 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 | -1.89 ± 0.12 |
| log L5100,AGN | 40.65 ± 0.63 |
| log HβBr/[O III] | 0.39 ± 0.06 |
| log ML5100/M☉ | 6.64 ± 0.28 |
| log MHα/M☉ | 6.94 ± 0.06 |
| log MHβ/M☉ | 7.36 ± 0.08 |
| log M[O III]/M☉ | 7.28 ± 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 | 39.32 ± 0.24 | 220 ± 63 | 91 ± 25 | 225.24 ± 80.03 |
| Hγ Broad | — | — | — | — |
| [O III] 4364 | 39.41 ± 0.17 | 215 ± 62 | 88 ± 25 | 293.52 ± 71.97 |
| He II Narrow | — | — | — | — |
| He II Broad | — | — | — | — |
| Hβ Narrow | 39.07 ± 0.32 | 220 ± 63 | 91 ± 25 | 130.71 ± 66.49 |
| Hβ Broad | 40.54 ± 0.06 | 3894 ± 234 | 1490 ± 27 | 3978.19 ± 292.30 |
| [O III] 5007 | 40.15 ± 0.03 | 220 ± 63 | 91 ± 25 | 1633.29 ± 72.27 |
| He I Narrow | — | — | — | — |
| He I Broad | 40.30 ± 0.08 | 5990 ± 62 | 2544 ± 25 | 2356.29 ± 260.61 |
| [O I] 6300 | 38.98 ± 0.25 | 215 ± 62 | 88 ± 25 | 113.23 ± 39.61 |
| Hα Narrow | 39.83 ± 0.05 | 215 ± 62 | 88 ± 25 | 816.88 ± 50.12 |
| Hα Broad | 41.11 ± 0.01 | 3088 ± 191 | 1412 ± 29 | 15336.16 ± 214.64 |
| [N II] 6585 | 39.56 ± 0.09 | 215 ± 62 | 88 ± 25 | 441.36 ± 48.52 |
| [S II] 6718 | 39.40 ± 0.11 | 215 ± 62 | 88 ± 25 | 303.46 ± 42.14 |
| [S II] 6732 | 39.21 ± 0.17 | 215 ± 62 | 88 ± 25 | 198.29 ± 41.58 |
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 | 5.22 |
|---|---|
| Hβ Broad SNR | 1.72 |
| Hγ Broad SNR | 0.50 |
| AGN frac | 0.00 |
| Host frac | 1.00 |
| log L5100,Host | 43.14 |
| Fe II/Hβ | 0.61 |
| Fe II/[O III] | 1.49 |
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.