IRAS F21318-2739
Observation
| Spectrum ID | 1162188_sp1 |
|---|---|
| Alt name | XSS J2134-2720 |
| z | 0.0669 |
| RA, Dec | 323.6881, -27.4321 |
| MJD | 60909.54 |
| SNR/Å B/R | 11.4/23.5 |
| Obs Airmass | 1.01 |
| SMSS ID | 1162188 |
| Closest SMSS | 4.79'', 2001882089 |
| SMSS Mean r6"ap | 15.9 ± 0.2 |
| 2MASS Kext | 11.5 ± 0.0 |
AGN Properties
| Spectrum Type | Sy 1.8 |
|---|---|
| Quality Flag | good |
| AGN reference | B+2006 |
| MW E(B−V) | 0.030 |
| Power law αν | -1.95 ± 0.04 |
| log L5100,AGN | 43.41 ± 0.02 |
| log HβBr/[O III] | -0.53 ± 0.24 |
| log ML5100/M☉ | 7.36 ± 0.03 |
| log MHα/M☉ | 7.50 ± 0.03 |
| log MHβ/M☉ | 7.32 ± 0.13 |
| log M[O III]/M☉ | 7.73 ± 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 | 40.53 ± 0.09 | 326 ± 63 | 196 ± 25 | 6.76 ± 0.72 |
| Hγ Broad | 41.15 ± 0.05 | 2110 ± 388 | 934 ± 83 | 27.49 ± 1.65 |
| [O III] 4364 | 40.18 ± 0.13 | 284 ± 63 | 119 ± 25 | 2.97 ± 0.48 |
| He II Narrow | 40.32 ± 0.07 | 284 ± 63 | 119 ± 25 | 4.08 ± 0.45 |
| He II Broad | — | — | — | — |
| Hβ Narrow | 40.97 ± 0.03 | 326 ± 63 | 196 ± 25 | 18.36 ± 0.65 |
| Hβ Broad | 41.50 +0.47−0.02 | 2272 ± 82 | 861 ± 37 | 62.15 ± 1.28 |
| [O III] 5007 | 42.03 ± 0.01 | 326 ± 63 | 196 ± 25 | 210.20 ± 0.79 |
| He I Narrow | 40.23 ± 0.05 | 284 ± 63 | 119 ± 25 | 3.37 ± 0.26 |
| He I Broad | 41.15 ± 0.04 | 5107 ± 205 | 2169 ± 87 | 28.58 ± 1.16 |
| [O I] 6300 | 40.48 ± 0.03 | 284 ± 63 | 119 ± 25 | 5.99 ± 0.26 |
| Hα Narrow | 41.35 ± 0.01 | 284 ± 63 | 119 ± 25 | 44.49 ± 0.45 |
| Hα Broad | 42.43 ± 0.01 | 2332 ± 64 | 1083 ± 25 | 538.41 ± 1.53 |
| [N II] 6585 | 41.25 ± 0.01 | 284 ± 63 | 119 ± 25 | 35.41 ± 0.39 |
| [S II] 6718 | 40.89 ± 0.01 | 284 ± 63 | 119 ± 25 | 15.43 ± 0.30 |
| [S II] 6732 | 40.79 ± 0.02 | 284 ± 63 | 119 ± 25 | 12.37 ± 0.31 |
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 | 41.03 |
|---|---|
| Hβ Broad SNR | 7.64 |
| Hγ Broad SNR | 3.60 |
| AGN frac | 0.50 |
| Host frac | 0.50 |
| log L5100,Host | 43.41 |
| Fe II/Hβ | — |
| Fe II/[O III] | — |
Quality flags
spurious_hab/hbb | 0.0/1 |
|---|---|
l5100 | 1 |
balmer | 0 |
balmer_snr | 0 |
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.