2MASS J21572316-3123064
Observation
| Spectrum ID | 1215002_sp1 |
|---|---|
| Alt name | g2157232-312307 |
| z | 0.0851 |
| RA, Dec | 329.3465, -31.3851 |
| MJD | 59440.63 |
| SNR/Å B/R | 14.1/24.4 |
| Obs Airmass | 1.01 |
| SMSS ID | 1215002 |
| Closest SMSS | None (< 15") |
| SMSS Mean r6"ap | 16.8 ± 0.0 |
| 2MASS Kext | nan ± nan |
AGN Properties
| Spectrum Type | Sy 1.2 |
|---|---|
| Quality Flag | good |
| AGN reference | 6dFGS |
| MW E(B−V) | 0.021 |
| Power law αν | -0.57 ± 0.13 |
| log L5100,AGN | 43.62 ± 0.02 |
| log HβBr/[O III] | 0.39 ± 0.02 |
| log ML5100/M☉ | 7.22 ± 0.04 |
| log MHα/M☉ | 6.94 ± 0.04 |
| log MHβ/M☉ | 7.22 ± 0.04 |
| log M[O III]/M☉ | 7.19 ± 0.04 |
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 | 40.17 ± 0.19 | 385 ± 63 | 205 ± 26 | 1.45 ± 0.32 |
| Hγ Broad | 41.12 ± 0.04 | 1602 ± 122 | 587 ± 42 | 12.66 ± 0.61 |
| [O III] 4364 | 40.00 ± 0.19 | 378 ± 63 | 160 ± 25 | 0.98 ± 0.27 |
| He II Narrow | 39.77 ± 0.31 | 378 ± 63 | 160 ± 25 | 0.64 ± 0.27 |
| He II Broad | 40.31 ± 0.21 | 1696 ± 120 | 720 ± 50 | 2.19 ± 0.57 |
| Hβ Narrow | 40.73 ± 0.06 | 385 ± 63 | 205 ± 26 | 6.19 ± 0.34 |
| Hβ Broad | 41.79 ± 0.01 | 1741 ± 67 | 993 ± 40 | 69.80 ± 1.03 |
| [O III] 5007 | 41.40 ± 0.01 | 385 ± 63 | 205 ± 26 | 29.54 ± 0.38 |
| He I Narrow | 39.99 ± 0.10 | 378 ± 63 | 160 ± 25 | 1.48 ± 0.20 |
| He I Broad | 40.96 ± 0.03 | 3294 ± 108 | 1399 ± 45 | 13.71 ± 0.60 |
| [O I] 6300 | 39.94 ± 0.10 | 378 ± 63 | 160 ± 25 | 1.45 ± 0.22 |
| Hα Narrow | 41.27 ± 0.01 | 378 ± 63 | 160 ± 25 | 32.76 ± 0.31 |
| Hα Broad | 42.29 ± 0.01 | 1346 ± 63 | 762 ± 25 | 343.57 ± 0.89 |
| [N II] 6585 | 41.17 ± 0.01 | 378 ± 63 | 160 ± 25 | 26.10 ± 0.28 |
| [S II] 6718 | 40.81 ± 0.02 | 378 ± 63 | 160 ± 25 | 11.59 ± 0.32 |
| [S II] 6732 | 40.66 ± 0.02 | 378 ± 63 | 160 ± 25 | 8.41 ± 0.29 |
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 | 51.70 |
|---|---|
| Hβ Broad SNR | 16.54 |
| Hγ Broad SNR | 5.57 |
| AGN frac | 0.72 |
| Host frac | 0.28 |
| log L5100,Host | 43.21 |
| Fe II/Hβ | 1.14 |
| Fe II/[O III] | 2.82 |
Quality flags
spurious_hab/hbb | 0.0/0 |
|---|---|
l5100 | 0 |
balmer | 0 |
balmer_snr | 0 |
hb_width | 1 |
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.