6dFGS gJ155703.2-074134
Observation
| Spectrum ID | 169906444_sp1 |
|---|---|
| Alt name | g1557032-074134 |
| z | 0.0816 |
| RA, Dec | 239.2633, -7.6927 |
| MJD | 60077.68 |
| SNR/Å B/R | 6.8/9.3 |
| Obs Airmass | 1.19 |
| SMSS ID | 169906444 |
| Closest SMSS | None (< 15") |
| SMSS Mean r6"ap | 16.3 ± 0.0 |
| 2MASS Kext | 12.8 ± 0.1 |
AGN Properties
| Spectrum Type | Sy 1.0 |
|---|---|
| Quality Flag | good |
| AGN reference | 6dFGS |
| MW E(B−V) | 0.151 |
| Power law αν | -0.03 ± 0.20 |
| log L5100,AGN | 43.53 ± 0.03 |
| log HβBr/[O III] | 0.80 ± 0.03 |
| log ML5100/M☉ | 8.21 ± 0.10 |
| log MHα/M☉ | 7.46 ± 0.02 |
| log MHβ/M☉ | 8.35 ± 0.10 |
| log M[O III]/M☉ | 8.12 ± 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 | 40.33 ± 0.18 | 349 ± 64 | 137 ± 25 | 2.38 ± 0.44 |
| Hγ Broad | 40.69 ± 0.16 | 1343 ± 113 | 514 ± 39 | 4.49 ± 0.97 |
| [O III] 4364 | 40.10 ± 0.21 | 265 ± 63 | 112 ± 25 | 1.41 ± 0.42 |
| He II Narrow | 39.75 ± 0.35 | 265 ± 63 | 112 ± 25 | 0.73 ± 0.43 |
| He II Broad | 41.22 ± 0.09 | 8591 ± 66 | 3648 ± 27 | 21.41 ± 2.62 |
| Hβ Narrow | 40.54 ± 0.09 | 349 ± 64 | 137 ± 25 | 4.82 ± 0.49 |
| Hβ Broad | 42.02 ± 0.02 | 5662 ± 600 | 4458 ± 85 | 145.83 ± 3.95 |
| [O III] 5007 | 41.22 ± 0.02 | 349 ± 64 | 137 ± 25 | 24.08 ± 0.58 |
| He I Narrow | 39.44 ± 0.42 | 265 ± 63 | 112 ± 25 | 0.56 ± 0.44 |
| He I Broad | 40.88 ± 0.08 | 3057 ± 71 | 1298 ± 29 | 15.11 ± 1.62 |
| [O I] 6300 | 39.87 ± 0.19 | 265 ± 63 | 112 ± 25 | 1.72 ± 0.48 |
| Hα Narrow | 41.13 ± 0.02 | 265 ± 63 | 112 ± 25 | 34.00 ± 0.60 |
| Hα Broad | 41.95 ± 0.01 | 3101 ± 81 | 1147 ± 25 | 223.98 ± 2.13 |
| [N II] 6585 | 41.00 ± 0.02 | 265 ± 63 | 112 ± 25 | 24.88 ± 0.60 |
| [S II] 6718 | 40.49 ± 0.05 | 265 ± 63 | 112 ± 25 | 8.09 ± 0.73 |
| [S II] 6732 | 40.34 ± 0.08 | 265 ± 63 | 112 ± 25 | 5.73 ± 0.77 |
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 | 7.51 |
|---|---|
| Hβ Broad SNR | 4.15 |
| Hγ Broad SNR | 1.40 |
| AGN frac | 0.77 |
| Host frac | 0.23 |
| log L5100,Host | 43.00 |
| Fe II/Hβ | 0.33 |
| Fe II/[O III] | 2.08 |
Quality flags
spurious_hab/hbb | 0.0/0 |
|---|---|
l5100 | 0 |
balmer | 2 |
balmer_snr | 1 |
hb_width | 2 |
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.