IRAS 16433-1118
Observation
| Spectrum ID | 192952618_sp1 |
|---|---|
| Alt name | g1646104-112404 |
| z | 0.0734 |
| RA, Dec | 251.5433, -11.4012 |
| MJD | 59725.63 |
| SNR/Å B/R | 8.5/13.0 |
| Obs Airmass | 1.07 |
| SMSS ID | 192952618 |
| Closest SMSS | 12.30'', 192952617 |
| SMSS Mean r6"ap | 16.0 ± 0.0 |
| 2MASS Kext | nan ± nan |
AGN Properties
| Spectrum Type | Sy 1.5 |
|---|---|
| Quality Flag | good |
| AGN reference | 6dFGS |
| MW E(B−V) | 0.500 |
| Power law αν | -1.17 ± 0.04 |
| log L5100,AGN | 44.65 ± 0.01 |
| log HβBr/[O III] | 0.02 ± 0.03 |
| log ML5100/M☉ | 7.65 ± 0.02 |
| log MHα/M☉ | 7.78 ± 0.05 |
| log MHβ/M☉ | 7.51 ± 0.02 |
| log M[O III]/M☉ | 7.69 ± 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 | 41.16 ± 0.37 | 540 ± 68 | 331 ± 29 | 1.44 ± 0.52 |
| Hγ Broad | 41.59 ± 0.19 | 1203 ± 64 | 432 ± 25 | 3.24 ± 0.65 |
| [O III] 4364 | 40.57 ± 0.34 | 124 ± 62 | 51 ± 25 | 0.37 ± 0.20 |
| He II Narrow | 40.49 ± 0.38 | 124 ± 62 | 51 ± 25 | 0.33 ± 0.18 |
| He II Broad | 41.06 ± 0.33 | 1182 ± 63 | 502 ± 25 | 1.24 ± 0.58 |
| Hβ Narrow | 41.24 ± 0.29 | 540 ± 68 | 331 ± 29 | 1.88 ± 0.51 |
| Hβ Broad | 42.45 ± 0.03 | 1716 ± 28 | 616 ± 25 | 31.21 ± 0.76 |
| [O III] 5007 | 42.44 ± 0.02 | 540 ± 68 | 331 ± 29 | 30.72 ± 0.56 |
| He I Narrow | 40.27 ± 0.39 | 124 ± 62 | 51 ± 25 | 0.24 ± 0.13 |
| He I Broad | 40.80 ± 0.31 | 1187 ± 63 | 504 ± 25 | 0.81 ± 0.37 |
| [O I] 6300 | 40.44 ± 0.24 | 124 ± 62 | 51 ± 25 | 0.38 ± 0.12 |
| Hα Narrow | 41.09 ± 0.09 | 124 ± 62 | 51 ± 25 | 1.71 ± 0.20 |
| Hα Broad | 43.14 ± 0.01 | 1957 ± 69 | 736 ± 25 | 195.16 ± 0.70 |
| [N II] 6585 | 40.84 ± 0.14 | 124 ± 62 | 51 ± 25 | 0.98 ± 0.16 |
| [S II] 6718 | 40.85 ± 0.12 | 124 ± 62 | 51 ± 25 | 1.00 ± 0.13 |
| [S II] 6732 | 40.81 ± 0.13 | 124 ± 62 | 51 ± 25 | 0.91 ± 0.17 |
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 | 24.59 |
|---|---|
| Hβ Broad SNR | 7.93 |
| Hγ Broad SNR | 1.73 |
| AGN frac | 1.00 |
| Host frac | 0.00 |
| log L5100,Host | 42.29 |
| Fe II/Hβ | 2.24 |
| Fe II/[O III] | 2.33 |
Quality flags
spurious_hab/hbb | 0.0/0 |
|---|---|
l5100 | 0 |
balmer | 0 |
balmer_snr | 1 |
hb_width | 0 |
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.