LEDA 3082923
Observation
| Spectrum ID | 487162588_sp1 |
|---|---|
| Alt name | g2022088-471452 |
| z | 0.0312 |
| RA, Dec | 305.5368, -47.2476 |
| MJD | 60082.72 |
| SNR/Å B/R | 17.5/31.2 |
| Obs Airmass | 1.09 |
| SMSS ID | 487162588 |
| Closest SMSS | None (< 15") |
| SMSS Mean r6"ap | 15.9 ± 0.0 |
| 2MASS Kext | 12.6 ± 0.1 |
AGN Properties
| Spectrum Type | Sy 1.5 |
|---|---|
| Quality Flag | good |
| AGN reference | 6dFGS |
| MW E(B−V) | 0.030 |
| Power law αν | -1.94 ± 0.05 |
| log L5100,AGN | 42.21 ± 0.07 |
| log HβBr/[O III] | -0.27 ± 0.30 |
| log ML5100/M☉ | 7.02 ± 0.05 |
| log MHα/M☉ | 6.49 ± 0.05 |
| log MHβ/M☉ | 6.97 ± 0.16 |
| log M[O III]/M☉ | 7.21 ± 0.04 |
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 | 38.92 ± 0.30 | 185 ± 62 | 113 ± 31 | 2.56 ± 1.96 |
| Hγ Broad | 39.80 ± 0.11 | 1188 ± 63 | 437 ± 25 | 17.37 ± 2.68 |
| [O III] 4364 | 39.14 ± 0.17 | 190 ± 62 | 77 ± 25 | 4.26 ± 1.06 |
| He II Narrow | 38.87 ± 0.30 | 190 ± 62 | 77 ± 25 | 2.32 ± 1.17 |
| He II Broad | — | — | — | — |
| Hβ Narrow | 39.51 ± 0.07 | 185 ± 62 | 114 ± 31 | 10.01 ± 1.63 |
| Hβ Broad | 40.34 +0.56−0.05 | 2766 ± 38 | 1026 ± 25 | 69.09 ± 3.31 |
| [O III] 5007 | 40.62 ± 0.01 | 185 ± 62 | 114 ± 31 | 129.33 ± 1.81 |
| He I Narrow | 38.20 ± 0.48 | 190 ± 62 | 77 ± 25 | 0.50 ± 0.49 |
| He I Broad | 39.58 ± 0.11 | 1731 ± 66 | 735 ± 26 | 12.01 ± 1.73 |
| [O I] 6300 | 39.04 ± 0.12 | 190 ± 62 | 77 ± 25 | 3.45 ± 0.58 |
| Hα Narrow | 40.02 ± 0.02 | 190 ± 62 | 77 ± 25 | 33.20 ± 0.64 |
| Hα Broad | 40.97 ± 0.01 | 2036 ± 79 | 832 ± 25 | 295.94 ± 2.34 |
| [N II] 6585 | 39.85 ± 0.02 | 190 ± 62 | 77 ± 25 | 22.76 ± 0.61 |
| [S II] 6718 | 39.40 ± 0.05 | 190 ± 62 | 77 ± 25 | 8.03 ± 0.61 |
| [S II] 6732 | 39.37 ± 0.06 | 190 ± 62 | 77 ± 25 | 7.51 ± 0.64 |
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 | 10.79 |
|---|---|
| Hβ Broad SNR | 2.67 |
| Hγ Broad SNR | 1.95 |
| AGN frac | 0.12 |
| Host frac | 0.88 |
| log L5100,Host | 43.08 |
| Fe II/Hβ | — |
| Fe II/[O III] | — |
Quality flags
spurious_hab/hbb | 0.0/2 |
|---|---|
l5100 | 2 |
balmer | 1 |
balmer_snr | 1 |
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.