6dFGS gJ172134.2-544315
Observation
| Spectrum ID | 370411405_sp2 |
|---|---|
| Alt name | g1721342-544315 |
| z | 0.0621 |
| RA, Dec | 260.3925, -54.7209 |
| MJD | 60899.4 |
| SNR/Å B/R | 10.6/21.0 |
| 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 | -0.10 ± 0.29 |
| log L5100,AGN | 43.25 ± 0.06 |
| log HβBr/[O III] | <-0.14 |
| log ML5100/M☉ | — |
| log MHα/M☉ | 7.34 ± 0.03 |
| log MHβ/M☉ | — |
| log M[O III]/M☉ | — |
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 | 39.98 ± 0.21 | 329 ± 63 | 161 ± 32 | 1.94 ± 0.81 |
| Hγ Broad | — | — | — | — |
| [O III] 4364 | 40.01 ± 0.16 | 326 ± 63 | 138 ± 25 | 2.19 ± 0.51 |
| He II Narrow | 39.43 ± 0.43 | 326 ± 63 | 138 ± 25 | 0.65 ± 0.51 |
| He II Broad | — | — | — | — |
| Hβ Narrow | 40.32 ± 0.08 | 329 ± 63 | 162 ± 32 | 5.32 ± 0.87 |
| Hβ Broad | <40.70 | — | — | — |
| [O III] 5007 | 40.84 ± 0.03 | 329 ± 63 | 162 ± 32 | 18.73 ± 0.96 |
| He I Narrow | 39.50 ± 0.28 | 326 ± 63 | 138 ± 25 | 1.17 ± 0.48 |
| He I Broad | 40.66 ± 0.08 | 3883 ± 63 | 1649 ± 25 | 17.09 ± 1.67 |
| [O I] 6300 | 39.70 ± 0.17 | 326 ± 63 | 138 ± 25 | 2.12 ± 0.48 |
| Hα Narrow | 40.94 ± 0.01 | 326 ± 63 | 138 ± 25 | 39.80 ± 0.64 |
| Hα Broad | 41.51 ± 0.02 | 3671 ± 93 | 1526 ± 49 | 149.79 ± 2.49 |
| [N II] 6585 | 40.77 ± 0.02 | 326 ± 63 | 138 ± 25 | 27.08 ± 0.63 |
| [S II] 6718 | 40.35 ± 0.04 | 326 ± 63 | 138 ± 25 | 10.74 ± 0.60 |
| [S II] 6732 | 40.21 ± 0.06 | 326 ± 63 | 138 ± 25 | 7.90 ± 0.61 |
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 | 3.88 |
|---|---|
| Hβ Broad SNR | 0.81 |
| Hγ Broad SNR | 0.00 |
| AGN frac | 0.42 |
| Host frac | 0.58 |
| log L5100,Host | 43.39 |
| Fe II/Hβ | — |
| Fe II/[O III] | — |
Quality flags
spurious_hab/hbb | 0.0/1 |
|---|---|
l5100 | 1 |
balmer | 2 |
balmer_snr | 2 |
hb_width | 2 |
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.