LEDA 418271
Observation
| Spectrum ID | 503370979_sp1 |
|---|---|
| Alt name | g0121423-543334 |
| z | 0.0669 |
| RA, Dec | 20.4262, -54.5594 |
| MJD | 60164.75 |
| SNR/Å B/R | 11.4/20.4 |
| Obs Airmass | 1.09 |
| SMSS ID | 503370979 |
| Closest SMSS | 4.93'', 2721122726 |
| SMSS Mean r6"ap | 16.6 ± 0.1 |
| 2MASS Kext | 12.5 ± 0.1 |
AGN Properties
| Spectrum Type | Sy 1.5 |
|---|---|
| Quality Flag | good |
| AGN reference | 6dFGS |
| MW E(B−V) | 0.017 |
| Power law αν | -0.53 ± 0.23 |
| log L5100,AGN | 43.13 ± 0.04 |
| log HβBr/[O III] | -0.19 ± 0.23 |
| log ML5100/M☉ | 7.48 ± 0.03 |
| log MHα/M☉ | 7.51 ± 0.02 |
| log MHβ/M☉ | 7.43 ± 0.12 |
| log M[O III]/M☉ | 7.66 ± 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 | 39.81 ± 0.16 | 242 ± 62 | 176 ± 28 | 1.94 ± 0.65 |
| Hγ Broad | 40.79 ± 0.06 | 2784 ± 291 | 1069 ± 57 | 18.17 ± 1.31 |
| [O III] 4364 | 39.69 ± 0.16 | 235 ± 63 | 99 ± 25 | 1.46 ± 0.34 |
| He II Narrow | 39.92 ± 0.09 | 235 ± 63 | 99 ± 25 | 2.75 ± 0.35 |
| He II Broad | — | — | — | — |
| Hβ Narrow | 40.43 ± 0.04 | 242 ± 62 | 176 ± 28 | 9.50 ± 0.71 |
| Hβ Broad | 41.21 +0.43−0.02 | 2994 ± 77 | 1102 ± 34 | 56.46 ± 1.35 |
| [O III] 5007 | 41.40 ± 0.01 | 242 ± 62 | 176 ± 28 | 92.11 ± 0.79 |
| He I Narrow | 39.06 ± 0.36 | 235 ± 63 | 99 ± 25 | 0.53 ± 0.30 |
| He I Broad | 40.15 ± 0.09 | 1375 ± 128 | 583 ± 54 | 6.38 ± 0.83 |
| [O I] 6300 | 39.85 ± 0.06 | 235 ± 63 | 99 ± 25 | 3.67 ± 0.30 |
| Hα Narrow | 40.91 ± 0.01 | 235 ± 63 | 99 ± 25 | 44.91 ± 0.47 |
| Hα Broad | 42.01 ± 0.01 | 3158 ± 65 | 1363 ± 27 | 564.58 ± 2.23 |
| [N II] 6585 | 40.59 ± 0.02 | 235 ± 63 | 99 ± 25 | 21.39 ± 0.43 |
| [S II] 6718 | 40.28 ± 0.02 | 235 ± 63 | 99 ± 25 | 10.81 ± 0.37 |
| [S II] 6732 | 40.19 ± 0.03 | 235 ± 63 | 99 ± 25 | 8.80 ± 0.38 |
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 | 23.30 |
|---|---|
| Hβ Broad SNR | 5.71 |
| Hγ Broad SNR | 2.65 |
| AGN frac | 0.51 |
| Host frac | 0.49 |
| log L5100,Host | 43.11 |
| Fe II/Hβ | — |
| Fe II/[O III] | — |
Quality flags
spurious_hab/hbb | 0.0/1 |
|---|---|
l5100 | 0 |
balmer | 0 |
balmer_snr | 1 |
hb_width | 0 |
balmer_width | 1 |
Hα mass estimates from Cho+2023. Remaining mass estimates from R–L relations in Wang & Woo 2024 and zero-points from Amrutha+2026.