IRAS 12288-4741
Observation
| Spectrum ID | 321338426_sp1 |
|---|---|
| Alt name | g1231372-475802 |
| z | 0.0280 |
| RA, Dec | 187.9048, -47.9672 |
| MJD | 61093.51 |
| SNR/Å B/R | 7.0/11.8 |
| Obs Airmass | 1.52 |
| SMSS ID | 321338426 |
| Closest SMSS | 7.88'', 2477131167 |
| SMSS Mean r6"ap | 15.2 ± 0.1 |
| 2MASS Kext | 11.0 ± 0.1 |
AGN Properties
| Spectrum Type | Sy 1.5 |
|---|---|
| Quality Flag | good |
| AGN reference | 6dFGS |
| MW E(B−V) | 0.088 |
| Power law αν | 0.36 ± 0.12 |
| log L5100,AGN | 42.70 ± 0.02 |
| log HβBr/[O III] | -0.18 ± 0.03 |
| log ML5100/M☉ | 7.14 ± 0.07 |
| log MHα/M☉ | 6.86 ± 0.04 |
| log MHβ/M☉ | 7.03 ± 0.08 |
| log M[O III]/M☉ | 7.23 ± 0.07 |
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 | 39.83 ± 0.08 | 241 ± 63 | 135 ± 25 | 4.70 ± 0.55 |
| Hγ Broad | 39.82 ± 0.18 | 1360 ± 98 | 509 ± 37 | 3.70 ± 1.02 |
| [O III] 4364 | — | — | — | — |
| He II Narrow | 39.07 ± 0.25 | 200 ± 63 | 84 ± 25 | 0.97 ± 0.35 |
| He II Broad | 40.10 ± 0.12 | 4287 ± 146 | 1821 ± 61 | 10.49 ± 1.74 |
| Hβ Narrow | 40.00 ± 0.04 | 241 ± 63 | 135 ± 25 | 8.98 ± 0.53 |
| Hβ Broad | 40.68 ± 0.03 | 2484 ± 182 | 1117 ± 55 | 43.22 ± 1.59 |
| [O III] 5007 | 40.86 ± 0.01 | 241 ± 63 | 135 ± 25 | 70.42 ± 0.59 |
| He I Narrow | 39.25 ± 0.09 | 200 ± 63 | 84 ± 25 | 2.54 ± 0.35 |
| He I Broad | 40.21 ± 0.05 | 3283 ± 144 | 1394 ± 60 | 23.02 ± 1.55 |
| [O I] 6300 | 39.24 ± 0.09 | 200 ± 63 | 84 ± 25 | 2.93 ± 0.41 |
| Hα Narrow | 40.58 ± 0.01 | 200 ± 63 | 84 ± 25 | 69.30 ± 0.60 |
| Hα Broad | 41.35 ± 0.01 | 2380 ± 67 | 1055 ± 31 | 409.41 ± 2.57 |
| [N II] 6585 | 40.36 ± 0.01 | 200 ± 63 | 84 ± 25 | 42.65 ± 0.56 |
| [S II] 6718 | 39.88 ± 0.02 | 200 ± 63 | 84 ± 25 | 14.75 ± 0.51 |
| [S II] 6732 | 39.76 ± 0.03 | 200 ± 63 | 84 ± 25 | 11.23 ± 0.51 |
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 | 14.23 |
|---|---|
| Hβ Broad SNR | 3.98 |
| Hγ Broad SNR | 1.19 |
| AGN frac | 0.65 |
| Host frac | 0.35 |
| log L5100,Host | 42.44 |
| Fe II/Hβ | 0.20 |
| Fe II/[O III] | 0.13 |
Quality flags
spurious_hab/hbb | 0.0/0 |
|---|---|
l5100 | 2 |
balmer | 0 |
balmer_snr | 1 |
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.