LEDA 628614
Observation
| Spectrum ID | 17516885_sp1 |
|---|---|
| Alt name | g0400407-370506 |
| z | 0.0512 |
| RA, Dec | 60.1697, -37.0851 |
| MJD | 59904.65 |
| SNR/Å B/R | 12.0/26.2 |
| Obs Airmass | 1.07 |
| SMSS ID | 17516885 |
| Closest SMSS | 14.66'', 17516886 |
| SMSS Mean r6"ap | 16.4 ± 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) | 0.004 |
| Power law αν | -0.38 ± 0.20 |
| log L5100,AGN | 42.89 ± 0.04 |
| log HβBr/[O III] | 0.29 ± 0.02 |
| log ML5100/M☉ | 7.71 ± 0.10 |
| log MHα/M☉ | 7.13 ± 0.04 |
| log MHβ/M☉ | 7.79 ± 0.10 |
| log M[O III]/M☉ | 7.79 ± 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 | 39.30 ± 0.35 | 275 ± 63 | 356 ± 28 | 1.03 ± 0.93 |
| Hγ Broad | 40.76 ± 0.05 | 3444 ± 756 | 1546 ± 70 | 29.69 ± 1.82 |
| [O III] 4364 | 39.37 ± 0.24 | 259 ± 63 | 109 ± 25 | 1.22 ± 0.41 |
| He II Narrow | 39.32 ± 0.21 | 259 ± 63 | 109 ± 25 | 1.21 ± 0.40 |
| He II Broad | 40.67 ± 0.06 | 7998 ± 94 | 3397 ± 39 | 26.80 ± 2.27 |
| Hβ Narrow | 39.99 ± 0.08 | 275 ± 63 | 357 ± 28 | 6.06 ± 0.94 |
| Hβ Broad | 41.26 ± 0.02 | 4415 ± 492 | 2088 ± 50 | 111.12 ± 2.07 |
| [O III] 5007 | 40.97 ± 0.01 | 275 ± 63 | 357 ± 28 | 60.22 ± 1.01 |
| He I Narrow | 39.16 ± 0.16 | 259 ± 63 | 109 ± 25 | 1.21 ± 0.27 |
| He I Broad | 40.51 ± 0.05 | 7100 ± 98 | 3015 ± 41 | 27.14 ± 1.54 |
| [O I] 6300 | 39.32 ± 0.10 | 259 ± 63 | 109 ± 25 | 1.94 ± 0.29 |
| Hα Narrow | 40.38 ± 0.02 | 259 ± 63 | 109 ± 25 | 24.25 ± 0.44 |
| Hα Broad | 41.64 ± 0.01 | 2632 ± 100 | 1548 ± 25 | 436.77 ± 1.60 |
| [N II] 6585 | 40.18 ± 0.02 | 259 ± 63 | 109 ± 25 | 15.18 ± 0.40 |
| [S II] 6718 | 39.84 ± 0.03 | 259 ± 63 | 109 ± 25 | 7.15 ± 0.35 |
| [S II] 6732 | 39.66 ± 0.05 | 259 ± 63 | 109 ± 25 | 4.72 ± 0.35 |
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 | 17.26 |
|---|---|
| Hβ Broad SNR | 6.82 |
| Hγ Broad SNR | 3.19 |
| AGN frac | 0.43 |
| Host frac | 0.57 |
| log L5100,Host | 43.01 |
| Fe II/Hβ | 0.53 |
| Fe II/[O III] | 1.03 |
Quality flags
spurious_hab/hbb | 0.0/0 |
|---|---|
l5100 | 1 |
balmer | 0 |
balmer_snr | 0 |
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.