LEDA 84945
Observation
| Spectrum ID | 487995745_sp1 |
|---|---|
| Alt name | g2049332-390204 |
| z | 0.0411 |
| RA, Dec | 312.3882, -39.0343 |
| MJD | 59438.46 |
| SNR/Å B/R | 12.0/27.6 |
| Obs Airmass | 1.18 |
| SMSS ID | 487995745 |
| Closest SMSS | 7.95'', 1596138593 |
| SMSS Mean r6"ap | 16.4 ± 0.0 |
| 2MASS Kext | 13.1 ± 0.1 |
AGN Properties
| Spectrum Type | Sy 1.8 |
|---|---|
| Quality Flag | good |
| AGN reference | 6dFGS |
| MW E(B−V) | 0.040 |
| Power law αν | -1.72 ± 0.07 |
| log L5100,AGN | 42.62 ± 0.03 |
| log HβBr/[O III] | -0.80 ± 0.03 |
| log ML5100/M☉ | 6.85 ± 0.15 |
| log MHα/M☉ | 6.50 ± 0.05 |
| log MHβ/M☉ | 6.79 ± 0.16 |
| log M[O III]/M☉ | 7.30 ± 0.15 |
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 | 40.09 ± 0.08 | 379 ± 62 | 309 ± 25 | 14.26 ± 1.47 |
| Hγ Broad | 39.93 ± 0.18 | 1316 ± 141 | 511 ± 78 | 8.57 ± 1.85 |
| [O III] 4364 | 39.79 ± 0.08 | 342 ± 62 | 144 ± 25 | 7.10 ± 0.82 |
| He II Narrow | 39.79 ± 0.07 | 342 ± 62 | 144 ± 25 | 7.36 ± 0.73 |
| He II Broad | 40.49 ± 0.05 | 4073 ± 70 | 1730 ± 28 | 36.10 ± 2.48 |
| Hβ Narrow | 40.55 ± 0.03 | 379 ± 62 | 309 ± 25 | 42.55 ± 1.23 |
| Hβ Broad | 40.71 ± 0.03 | 1850 ± 299 | 1524 ± 74 | 61.13 ± 2.78 |
| [O III] 5007 | 41.52 ± 0.01 | 379 ± 62 | 309 ± 25 | 395.11 ± 1.40 |
| He I Narrow | 39.13 ± 0.21 | 342 ± 62 | 144 ± 25 | 1.71 ± 0.36 |
| He I Broad | 40.01 ± 0.05 | 1179 ± 62 | 500 ± 25 | 12.91 ± 0.69 |
| [O I] 6300 | 40.04 ± 0.02 | 342 ± 62 | 144 ± 25 | 14.12 ± 0.38 |
| Hα Narrow | 40.93 ± 0.01 | 342 ± 62 | 144 ± 25 | 111.36 ± 0.50 |
| Hα Broad | 41.39 ± 0.01 | 1527 ± 66 | 720 ± 25 | 316.63 ± 1.29 |
| [N II] 6585 | 40.64 ± 0.01 | 342 ± 62 | 144 ± 25 | 57.14 ± 0.50 |
| [S II] 6718 | 40.44 ± 0.01 | 342 ± 62 | 144 ± 25 | 36.04 ± 0.41 |
| [S II] 6732 | 40.43 ± 0.01 | 342 ± 62 | 144 ± 25 | 35.01 ± 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 | 23.70 |
|---|---|
| Hβ Broad SNR | 4.03 |
| Hγ Broad SNR | 1.57 |
| AGN frac | 0.30 |
| Host frac | 0.70 |
| log L5100,Host | 43.00 |
| Fe II/Hβ | 0.38 |
| Fe II/[O III] | 0.06 |
Quality flags
spurious_hab/hbb | 0.0/0 |
|---|---|
l5100 | 1 |
balmer | 0 |
balmer_snr | 1 |
hb_width | 2 |
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.