LEDA 15898
Observation
| Spectrum ID | 18467702_sp1 |
|---|---|
| Alt name | g0443551-392608 |
| z | 0.0568 |
| RA, Dec | 70.9796, -39.4357 |
| MJD | 60254.68 |
| SNR/Å B/R | 4.3/4.5 |
| Obs Airmass | 1.02 |
| SMSS ID | 18467702 |
| Closest SMSS | None (< 15") |
| SMSS Mean r6"ap | 16.5 ± 0.1 |
| 2MASS Kext | 12.8 ± 0.1 |
AGN Properties
| Spectrum Type | Bad |
|---|---|
| Quality Flag | bad_blue |
| AGN reference | 6dFGS |
| MW E(B−V) | 0.022 |
| Power law αν | 0.48 ± 0.02 |
| log L5100,AGN | 43.63 ± 0.01 |
| log HβBr/[O III] | — |
| log ML5100/M☉ | — |
| log MHα/M☉ | 6.40 ± 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 | 39.91 ± 0.38 | 138 ± 63 | 79 ± 32 | 0.60 ± 0.41 |
| Hγ Broad | — | — | — | — |
| [O III] 4364 | 40.04 ± 0.27 | 135 ± 63 | 54 ± 25 | 0.89 ± 0.34 |
| He II Narrow | 39.99 ± 0.29 | 135 ± 63 | 54 ± 25 | 0.93 ± 0.36 |
| He II Broad | 40.62 ± 0.22 | 1184 ± 63 | 503 ± 25 | 4.05 ± 1.13 |
| Hβ Narrow | 40.11 ± 0.25 | 138 ± 63 | 79 ± 32 | 1.24 ± 0.44 |
| Hβ Broad | — | — | — | — |
| [O III] 5007 | 40.10 ± 0.26 | 138 ± 63 | 79 ± 32 | 1.32 ± 0.45 |
| He I Narrow | 40.25 ± 0.27 | 135 ± 63 | 54 ± 25 | 2.99 ± 1.00 |
| He I Broad | 41.54 ± 0.08 | 4793 ± 63 | 2035 ± 25 | 59.16 ± 6.37 |
| [O I] 6300 | 40.22 ± 0.21 | 135 ± 63 | 54 ± 25 | 3.32 ± 1.02 |
| Hα Narrow | 41.21 ± 0.04 | 135 ± 63 | 54 ± 25 | 35.35 ± 1.52 |
| Hα Broad | 41.51 ± 0.05 | 1251 ± 64 | 470 ± 25 | 72.37 ± 4.42 |
| [N II] 6585 | 40.82 ± 0.08 | 135 ± 63 | 54 ± 25 | 14.61 ± 1.47 |
| [S II] 6718 | 40.54 ± 0.12 | 135 ± 63 | 54 ± 25 | 8.16 ± 1.28 |
| [S II] 6732 | 40.49 ± 0.13 | 135 ± 63 | 54 ± 25 | 7.21 ± 1.32 |
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 | 3.03 |
|---|---|
| Hβ Broad SNR | 0.00 |
| Hγ Broad SNR | 0.00 |
| AGN frac | 0.66 |
| Host frac | 0.34 |
| log L5100,Host | 43.34 |
| Fe II/Hβ | — |
| Fe II/[O III] | 8.49 |
Quality flags
spurious_hab/hbb | 0.0/0 |
|---|---|
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.