6dFGS gJ172134.2-544315
Observation
| Spectrum ID | 370411405_sp1 |
|---|---|
| Alt name | g1721342-544315 |
| z | 0.0621 |
| RA, Dec | 260.3925, -54.7209 |
| MJD | 59019.55 |
| SNR/Å B/R | 14.5/30.4 |
| Obs Airmass | 1.09 |
| SMSS ID | 370411405 |
| Closest SMSS | 1.58'', 2540816648 |
| SMSS Mean r6"ap | nan ± nan |
| 2MASS Kext | 12.3 ± 0.1 |
AGN Properties
| Spectrum Type | Sy 1.5 |
|---|---|
| Quality Flag | good |
| AGN reference | 6dFGS |
| MW E(B−V) | 0.163 |
| Power law αν | -0.64 ± 0.12 |
| log L5100,AGN | 43.41 ± 0.02 |
| log HβBr/[O III] | -0.05 ± 0.08 |
| log ML5100/M☉ | 7.72 ± 0.09 |
| log MHα/M☉ | 7.50 ± 0.03 |
| log MHβ/M☉ | 7.35 ± 0.11 |
| log M[O III]/M☉ | 7.49 ± 0.10 |
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 | 39.52 ± 0.36 | 294 ± 63 | 142 ± 29 | 0.51 ± 0.42 |
| Hγ Broad | — | — | — | — |
| [O III] 4364 | 39.79 ± 0.21 | 296 ± 62 | 124 ± 25 | 0.98 ± 0.28 |
| He II Narrow | 39.29 ± 0.44 | 296 ± 62 | 124 ± 25 | 0.34 ± 0.26 |
| He II Broad | 39.92 ± 0.32 | 1576 ± 62 | 669 ± 25 | 1.46 ± 0.64 |
| Hβ Narrow | 40.31 ± 0.07 | 294 ± 63 | 142 ± 29 | 3.75 ± 0.45 |
| Hβ Broad | 40.78 ± 0.08 | 3420 ± 369 | 1296 ± 37 | 10.81 ± 1.03 |
| [O III] 5007 | 40.83 ± 0.02 | 294 ± 63 | 142 ± 29 | 12.75 ± 0.50 |
| He I Narrow | 39.27 ± 0.37 | 296 ± 62 | 124 ± 25 | 0.44 ± 0.19 |
| He I Broad | 39.98 ± 0.16 | 1179 ± 62 | 500 ± 25 | 2.29 ± 0.40 |
| [O I] 6300 | 39.85 ± 0.09 | 296 ± 62 | 124 ± 25 | 1.86 ± 0.22 |
| Hα Narrow | 40.94 ± 0.01 | 296 ± 62 | 124 ± 25 | 24.37 ± 0.30 |
| Hα Broad | 41.49 ± 0.01 | 4502 ± 129 | 1713 ± 25 | 85.30 ± 1.05 |
| [N II] 6585 | 40.81 ± 0.01 | 296 ± 62 | 124 ± 25 | 18.23 ± 0.27 |
| [S II] 6718 | 40.35 ± 0.03 | 296 ± 62 | 124 ± 25 | 6.47 ± 0.26 |
| [S II] 6732 | 40.28 ± 0.04 | 296 ± 62 | 124 ± 25 | 5.45 ± 0.26 |
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 | 4.33 |
|---|---|
| Hβ Broad SNR | 1.53 |
| Hγ Broad SNR | 0.89 |
| AGN frac | 0.52 |
| Host frac | 0.48 |
| log L5100,Host | 43.38 |
| Fe II/Hβ | 1.19 |
| Fe II/[O III] | 1.05 |
Quality flags
spurious_hab/hbb | 0.0/0 |
|---|---|
l5100 | 0 |
balmer | 1 |
balmer_snr | 2 |
hb_width | 0 |
balmer_width | 2 |
Hα mass estimates from Cho+2023. Remaining mass estimates from R–L relations in Wang & Woo 2024 and zero-points from Amrutha+2026.