IRAS 12074-4619
Observation
| Spectrum ID | 321253823_sp1 |
|---|---|
| Alt name | g1210040-463627 |
| z | 0.0315 |
| RA, Dec | 182.5169, -46.6075 |
| MJD | 59434.36 |
| SNR/Å B/R | 16.5/35.7 |
| Obs Airmass | 1.36 |
| SMSS ID | 321253823 |
| Closest SMSS | 8.60'', 2477003903 |
| SMSS Mean r6"ap | 15.6 ± 0.0 |
| 2MASS Kext | 11.0 ± 0.1 |
AGN Properties
| Spectrum Type | Sy 1.5 |
|---|---|
| Quality Flag | good |
| AGN reference | 6dFGS |
| MW E(B−V) | 0.103 |
| Power law αν | -1.37 ± 0.17 |
| log L5100,AGN | 43.05 ± 0.02 |
| log HβBr/[O III] | -0.18 ± 0.23 |
| log ML5100/M☉ | 7.45 ± 0.03 |
| log MHα/M☉ | 7.22 ± 0.02 |
| log MHβ/M☉ | 7.35 ± 0.12 |
| log M[O III]/M☉ | 7.57 ± 0.02 |
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 | — | — | — | — |
| Hγ Broad | 40.61 ± 0.06 | 2470 ± 90 | 926 ± 32 | 16.23 ± 1.10 |
| [O III] 4364 | 39.45 ± 0.26 | 388 ± 63 | 164 ± 25 | 1.16 ± 0.41 |
| He II Narrow | 39.59 ± 0.15 | 388 ± 63 | 164 ± 25 | 1.66 ± 0.36 |
| He II Broad | — | — | — | — |
| Hβ Narrow | 40.06 ± 0.09 | 449 ± 63 | 399 ± 27 | 5.07 ± 0.63 |
| Hβ Broad | 41.04 +0.43−0.02 | 2989 ± 48 | 1096 ± 26 | 48.59 ± 1.00 |
| [O III] 5007 | 41.23 ± 0.01 | 449 ± 63 | 399 ± 27 | 75.72 ± 0.67 |
| He I Narrow | 39.23 ± 0.17 | 388 ± 63 | 164 ± 25 | 0.83 ± 0.19 |
| He I Broad | 40.68 ± 0.03 | 5107 ± 126 | 2169 ± 53 | 23.68 ± 0.75 |
| [O I] 6300 | 39.84 ± 0.04 | 388 ± 63 | 164 ± 25 | 3.55 ± 0.21 |
| Hα Narrow | 40.34 ± 0.03 | 388 ± 63 | 164 ± 25 | 11.69 ± 0.27 |
| Hα Broad | 41.75 ± 0.01 | 2693 ± 66 | 1046 ± 25 | 300.96 ± 0.69 |
| [N II] 6585 | 40.71 ± 0.01 | 388 ± 63 | 164 ± 25 | 27.47 ± 0.26 |
| [S II] 6718 | 40.13 ± 0.02 | 388 ± 63 | 164 ± 25 | 7.24 ± 0.24 |
| [S II] 6732 | 40.15 ± 0.02 | 388 ± 63 | 164 ± 25 | 7.71 ± 0.24 |
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 | 27.26 |
|---|---|
| Hβ Broad SNR | 6.60 |
| Hγ Broad SNR | 3.27 |
| AGN frac | 0.48 |
| Host frac | 0.52 |
| log L5100,Host | 43.09 |
| Fe II/Hβ | — |
| Fe II/[O III] | — |
Quality flags
spurious_hab/hbb | 0.0/2 |
|---|---|
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.