LEDA 410865
Observation
| Spectrum ID | 489476115_sp1 |
|---|---|
| Alt name | g2303580-551718 |
| z | 0.0846 |
| RA, Dec | 345.9917, -55.2883 |
| MJD | 60171.61 |
| SNR/Å B/R | 10.3/17.5 |
| Obs Airmass | 1.11 |
| SMSS ID | 489476115 |
| Closest SMSS | None (< 15") |
| SMSS Mean r6"ap | 16.6 ± 0.1 |
| 2MASS Kext | 12.7 ± 0.1 |
AGN Properties
| Spectrum Type | Sy 1.5 |
|---|---|
| Quality Flag | good |
| AGN reference | 6dFGS |
| MW E(B−V) | 0.009 |
| Power law αν | 0.48 ± 0.02 |
| log L5100,AGN | 43.08 ± 0.02 |
| log HβBr/[O III] | 0.27 ± 0.04 |
| log ML5100/M☉ | 7.54 ± 0.03 |
| log MHα/M☉ | 7.14 ± 0.04 |
| log MHβ/M☉ | 7.57 ± 0.04 |
| log M[O III]/M☉ | 7.58 ± 0.03 |
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 | 39.87 ± 0.47 | 1627 ± 62 | 629 ± 25 | 2.11 ± 1.26 |
| Hγ Broad | — | — | — | — |
| [O III] 4364 | 40.07 ± 0.25 | 1178 ± 62 | 500 ± 25 | 3.41 ± 1.21 |
| He II Narrow | 39.58 ± 0.53 | 1178 ± 62 | 500 ± 25 | 1.32 ± 1.25 |
| He II Broad | 40.13 ± 0.24 | 1317 ± 62 | 559 ± 25 | 4.69 ± 1.35 |
| Hβ Narrow | — | — | — | — |
| Hβ Broad | 41.34 ± 0.03 | 3279 ± 65 | 1220 ± 25 | 83.60 ± 2.58 |
| [O III] 5007 | 41.07 ± 0.03 | 1627 ± 62 | 629 ± 25 | 48.20 ± 1.75 |
| He I Narrow | — | — | — | — |
| He I Broad | — | — | — | — |
| [O I] 6300 | — | — | — | — |
| Hα Narrow | 40.71 ± 0.10 | 1178 ± 62 | 500 ± 25 | 40.62 ± 1.82 |
| Hα Broad | 41.77 ± 0.02 | 2447 ± 108 | 2020 ± 46 | 469.44 ± 5.31 |
| [N II] 6585 | 40.22 ± 0.32 | 1178 ± 62 | 500 ± 25 | 13.25 ± 1.82 |
| [S II] 6718 | 40.09 ± 0.20 | 1178 ± 62 | 500 ± 25 | 10.36 ± 2.55 |
| [S II] 6732 | 40.00 ± 0.23 | 1178 ± 62 | 500 ± 25 | 8.60 ± 2.69 |
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 | 8.26 |
|---|---|
| Hβ Broad SNR | 4.88 |
| Hγ Broad SNR | 0.76 |
| AGN frac | 0.33 |
| Host frac | 0.67 |
| log L5100,Host | 43.38 |
| Fe II/Hβ | 0.17 |
| Fe II/[O III] | 0.32 |
Quality flags
spurious_hab/hbb | 0.0/0 |
|---|---|
l5100 | 2 |
balmer | 0 |
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.