LEDA 74977
Observation
| Spectrum ID | 17326535_sp1 |
|---|---|
| Alt name | g0345125-393429 |
| z | 0.0429 |
| RA, Dec | 56.3022, -39.5748 |
| MJD | 59193.5 |
| SNR/Å B/R | 3.8/13.3 |
| Obs Airmass | 1.02 |
| SMSS ID | 17326535 |
| Closest SMSS | None (< 15") |
| SMSS Mean r6"ap | 15.0 ± 0.1 |
| 2MASS Kext | 10.8 ± 0.0 |
AGN Properties
| Spectrum Type | Bad |
|---|---|
| Quality Flag | bad_blue |
| AGN reference | 6dFGS |
| MW E(B−V) | 0.016 |
| Power law αν | -1.03 ± 0.19 |
| log L5100,AGN | 43.16 ± 0.01 |
| log HβBr/[O III] | 0.42 ± 0.03 |
| log ML5100/M☉ | 8.10 ± 0.10 |
| log MHα/M☉ | 7.69 ± 0.02 |
| log MHβ/M☉ | 8.20 ± 0.10 |
| log M[O III]/M☉ | 8.14 ± 0.10 |
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 | 39.84 ± 0.40 | 583 ± 64 | 268 ± 33 | 2.06 ± 1.47 |
| Hγ Broad | — | — | — | — |
| [O III] 4364 | 40.10 ± 0.22 | 567 ± 63 | 240 ± 25 | 3.81 ± 1.19 |
| He II Narrow | — | — | — | — |
| He II Broad | 40.07 ± 0.31 | 1368 ± 64 | 581 ± 26 | 3.85 ± 1.61 |
| Hβ Narrow | 40.12 ± 0.26 | 583 ± 64 | 268 ± 33 | 4.40 ± 1.29 |
| Hβ Broad | 41.57 ± 0.02 | 5997 ± 706 | 2489 ± 41 | 125.20 ± 3.69 |
| [O III] 5007 | 41.16 ± 0.02 | 583 ± 64 | 269 ± 33 | 49.63 ± 1.33 |
| He I Narrow | 38.90 ± 0.52 | 567 ± 63 | 240 ± 25 | 0.33 ± 0.30 |
| He I Broad | 39.77 ± 0.19 | 1408 ± 65 | 598 ± 26 | 2.37 ± 0.49 |
| [O I] 6300 | 39.17 ± 0.35 | 567 ± 63 | 240 ± 25 | 0.65 ± 0.32 |
| Hα Narrow | 40.87 ± 0.01 | 567 ± 63 | 240 ± 25 | 33.72 ± 0.41 |
| Hα Broad | 41.69 ± 0.01 | 4869 ± 83 | 1835 ± 37 | 218.88 ± 1.33 |
| [N II] 6585 | 40.42 ± 0.03 | 567 ± 63 | 240 ± 25 | 11.97 ± 0.75 |
| [S II] 6718 | 39.85 ± 0.08 | 567 ± 63 | 240 ± 25 | 3.29 ± 0.36 |
| [S II] 6732 | 39.91 ± 0.07 | 567 ± 63 | 240 ± 25 | 3.81 ± 0.36 |
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 | 4.83 |
|---|---|
| Hβ Broad SNR | 4.12 |
| Hγ Broad SNR | 0.95 |
| AGN frac | 0.92 |
| Host frac | 0.08 |
| log L5100,Host | 42.09 |
| Fe II/Hβ | 0.46 |
| Fe II/[O III] | 1.20 |
Quality flags
spurious_hab/hbb | 0.0/0 |
|---|---|
l5100 | 0 |
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.