LEDA 374930
Observation
| Spectrum ID | 479331885_sp1 |
|---|---|
| Alt name | g1921494-585831 |
| z | 0.0364 |
| RA, Dec | 290.4557, -58.9752 |
| MJD | 60450.78 |
| SNR/Å B/R | 10.7/26.3 |
| Obs Airmass | 1.16 |
| SMSS ID | 479331885 |
| Closest SMSS | None (< 15") |
| SMSS Mean r6"ap | 15.5 ± 0.0 |
| 2MASS Kext | 10.9 ± 0.0 |
AGN Properties
| Spectrum Type | Sy 1.5+ |
|---|---|
| Quality Flag | good |
| AGN reference | 6dFGS |
| MW E(B−V) | 0.120 |
| Power law αν | -1.87 ± 0.12 |
| log L5100,AGN | 41.49 ± 0.64 |
| log HβBr/[O III] | <-0.32 |
| log ML5100/M☉ | — |
| log MHα/M☉ | 6.74 ± 0.07 |
| 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 | 39.67 ± 0.34 | 421 ± 64 | 390 ± 41 | 76.14 ± 51.33 |
| Hγ Broad | — | — | — | — |
| [O III] 4364 | — | — | — | — |
| He II Narrow | — | — | — | — |
| He II Broad | 39.77 ± 0.35 | 1670 ± 62 | 709 ± 25 | 95.81 ± 46.92 |
| Hβ Narrow | 40.04 ± 0.14 | 421 ± 64 | 390 ± 41 | 180.42 ± 39.65 |
| Hβ Broad | <40.43 | — | — | — |
| [O III] 5007 | 40.75 ± 0.03 | 421 ± 64 | 390 ± 41 | 937.12 ± 40.47 |
| He I Narrow | 39.24 ± 0.29 | 383 ± 62 | 162 ± 25 | 29.35 ± 12.10 |
| He I Broad | 40.28 ± 0.13 | 5574 ± 62 | 2367 ± 25 | 322.75 ± 47.99 |
| [O I] 6300 | 39.21 ± 0.31 | 383 ± 62 | 162 ± 25 | 27.72 ± 11.66 |
| Hα Narrow | 40.60 ± 0.02 | 383 ± 62 | 162 ± 25 | 671.68 ± 12.56 |
| Hα Broad | 41.17 ± 0.02 | 2353 ± 152 | 920 ± 26 | 2512.74 ± 34.03 |
| [N II] 6585 | 40.49 ± 0.02 | 383 ± 62 | 162 ± 25 | 531.14 ± 13.55 |
| [S II] 6718 | 39.96 ± 0.06 | 383 ± 62 | 162 ± 25 | 157.64 ± 13.11 |
| [S II] 6732 | 39.85 ± 0.08 | 383 ± 62 | 162 ± 25 | 119.77 ± 12.29 |
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 | 4.86 |
|---|---|
| Hβ Broad SNR | 0.88 |
| Hγ Broad SNR | 0.00 |
| AGN frac | 0.01 |
| Host frac | 0.99 |
| log L5100,Host | 43.44 |
| Fe II/Hβ | — |
| Fe II/[O III] | 0.69 |
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.