LEDA 584623
Observation
| Spectrum ID | 1608495_sp1 |
|---|---|
| Alt name | g2244464-403541 |
| z | 0.0664 |
| RA, Dec | 341.1935, -40.5947 |
| MJD | 60171.59 |
| SNR/Å B/R | 13.4/25.0 |
| Obs Airmass | 1.04 |
| SMSS ID | 1608495 |
| Closest SMSS | 7.59'', 2002730871 |
| SMSS Mean r6"ap | 16.6 ± 0.1 |
| 2MASS Kext | 12.7 ± 0.1 |
AGN Properties
| Spectrum Type | Sy 1.5 |
|---|---|
| Quality Flag | good |
| AGN reference | 6dFGS |
| MW E(B−V) | 0.013 |
| Power law αν | -1.96 ± 0.04 |
| log L5100,AGN | 42.92 ± 0.03 |
| log HβBr/[O III] | 0.15 ± 0.34 |
| log ML5100/M☉ | 7.67 ± 0.03 |
| log MHα/M☉ | 6.70 ± 0.05 |
| log MHβ/M☉ | 7.45 ± 0.17 |
| log M[O III]/M☉ | 7.49 ± 0.05 |
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 ± 0.40 | 350 ± 63 | 193 ± 46 | 1.19 ± 1.09 |
| Hγ Broad | 40.15 ± 0.14 | 1373 ± 193 | 554 ± 110 | 7.47 ± 1.54 |
| [O III] 4364 | 39.70 ± 0.15 | 346 ± 63 | 146 ± 25 | 3.07 ± 0.63 |
| He II Narrow | 39.54 ± 0.19 | 346 ± 63 | 146 ± 25 | 2.11 ± 0.60 |
| He II Broad | — | — | — | — |
| Hβ Narrow | 40.02 ± 0.08 | 350 ± 63 | 194 ± 46 | 6.27 ± 1.03 |
| Hβ Broad | 40.66 +0.61−0.07 | 4097 ± 26 | 1520 ± 25 | 27.82 ± 1.99 |
| [O III] 5007 | 40.50 ± 0.03 | 350 ± 63 | 194 ± 46 | 19.34 ± 1.07 |
| He I Narrow | — | — | — | — |
| He I Broad | 39.57 ± 0.29 | 1909 ± 63 | 810 ± 25 | 2.27 ± 0.91 |
| [O I] 6300 | — | — | — | — |
| Hα Narrow | 40.32 ± 0.04 | 346 ± 63 | 146 ± 25 | 12.98 ± 0.42 |
| Hα Broad | 41.38 ± 0.01 | 1924 ± 106 | 1346 ± 25 | 149.94 ± 1.53 |
| [N II] 6585 | 40.20 ± 0.03 | 346 ± 63 | 146 ± 25 | 9.90 ± 0.40 |
| [S II] 6718 | 39.87 ± 0.06 | 346 ± 63 | 146 ± 25 | 4.65 ± 0.39 |
| [S II] 6732 | 40.04 ± 0.04 | 346 ± 63 | 146 ± 25 | 6.89 ± 0.40 |
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 | 9.39 |
|---|---|
| Hβ Broad SNR | 1.61 |
| Hγ Broad SNR | 1.54 |
| AGN frac | 0.34 |
| Host frac | 0.66 |
| log L5100,Host | 43.21 |
| Fe II/Hβ | — |
| Fe II/[O III] | — |
Quality flags
spurious_hab/hbb | 0.0/1 |
|---|---|
l5100 | 1 |
balmer | 1 |
balmer_snr | 2 |
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.