2MASS J20271922-4033352
Observation
| Spectrum ID | 487345163_sp1 |
|---|---|
| Alt name | g2027192-403336 |
| z | 0.0790 |
| RA, Dec | 306.8301, -40.5598 |
| MJD | 60082.73 |
| SNR/Å B/R | 14.3/20.5 |
| Obs Airmass | 1.05 |
| SMSS ID | 487345163 |
| Closest SMSS | 14.09'', 487345166 |
| SMSS Mean r6"ap | 16.8 ± 0.0 |
| 2MASS Kext | 13.2 ± 0.1 |
AGN Properties
| Spectrum Type | Sy 1.5 |
|---|---|
| Quality Flag | good |
| AGN reference | 6dFGS |
| MW E(B−V) | 0.037 |
| Power law αν | -0.26 ± 0.18 |
| log L5100,AGN | 43.53 ± 0.03 |
| log HβBr/[O III] | -0.13 ± 0.29 |
| log ML5100/M☉ | 7.75 ± 0.04 |
| log MHα/M☉ | 7.41 ± 0.02 |
| log MHβ/M☉ | 7.55 ± 0.15 |
| log M[O III]/M☉ | 7.76 ± 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 | 40.05 ± 0.16 | 301 ± 63 | 132 ± 26 | 1.29 ± 0.42 |
| Hγ Broad | 40.72 ± 0.09 | 1730 ± 310 | 677 ± 85 | 5.85 ± 0.66 |
| [O III] 4364 | 40.09 ± 0.12 | 297 ± 63 | 126 ± 25 | 1.41 ± 0.25 |
| He II Narrow | 40.06 ± 0.12 | 297 ± 63 | 126 ± 25 | 1.49 ± 0.32 |
| He II Broad | — | — | — | — |
| Hβ Narrow | 40.53 ± 0.04 | 301 ± 63 | 132 ± 26 | 4.68 ± 0.49 |
| Hβ Broad | 41.27 +0.55−0.03 | 3349 ± 144 | 1244 ± 57 | 25.47 ± 0.92 |
| [O III] 5007 | 41.40 ± 0.01 | 301 ± 63 | 133 ± 26 | 36.53 ± 0.59 |
| He I Narrow | 39.51 ± 0.26 | 297 ± 63 | 126 ± 25 | 0.63 ± 0.25 |
| He I Broad | 40.80 ± 0.07 | 4372 ± 238 | 1856 ± 101 | 12.31 ± 1.04 |
| [O I] 6300 | 39.99 ± 0.08 | 297 ± 63 | 126 ± 25 | 2.13 ± 0.26 |
| Hα Narrow | 41.13 ± 0.01 | 297 ± 63 | 126 ± 25 | 31.35 ± 0.37 |
| Hα Broad | 42.00 ± 0.01 | 2838 ± 73 | 1466 ± 34 | 235.36 ± 1.93 |
| [N II] 6585 | 40.89 ± 0.01 | 297 ± 63 | 126 ± 25 | 18.49 ± 0.36 |
| [S II] 6718 | 40.52 ± 0.04 | 297 ± 63 | 126 ± 25 | 8.05 ± 0.54 |
| [S II] 6732 | 40.50 ± 0.03 | 297 ± 63 | 126 ± 25 | 7.72 ± 0.45 |
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 | 13.66 |
|---|---|
| Hβ Broad SNR | 3.47 |
| Hγ Broad SNR | 2.10 |
| AGN frac | 0.62 |
| Host frac | 0.38 |
| log L5100,Host | 43.31 |
| Fe II/Hβ | — |
| Fe II/[O III] | — |
Quality flags
spurious_hab/hbb | 0.0/1 |
|---|---|
l5100 | 0 |
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.